Bug 11541 - boot hang unless "mtrr=off", caused by commit b1f6278d77c1f2f669346fc2bb48012b5e9495a- Asus M51TR notebook
boot hang unless "mtrr=off", caused by commit b1f6278d77c1f2f669346fc2bb48012...
Status: RESOLVED CODE_FIX
Product: Memory Management
Classification: Unclassified
Component: MTTR
All Linux
: P1 high
Assigned To: herrmann.der.user
:
: 11714 11737 12352 (view as bug list)
Depends on:
Blocks: 56331
  Show dependency treegraph
 
Reported: 2008-09-11 09:33 UTC by Jakub Liput
Modified: 2013-04-09 06:23 UTC (History)
11 users (show)

See Also:
Kernel Version: 2.6.24.5, 2.6.27-rc5, 2.6.26.5
Tree: Mainline
Regression: Yes


Attachments
acpidump - kernel 2.6.27-rc6 (acpi=off) (198.44 KB, application/octet-stream)
2008-09-12 04:53 UTC, Jakub Liput
Details
Photo of a screen where Linux freezes (106.77 KB, image/jpeg)
2008-09-13 02:40 UTC, Jakub Liput
Details
try the custom DSDT (382.07 KB, patch)
2008-09-15 22:51 UTC, ykzhao
Details | Diff
screenshot #2 (148.36 KB, image/jpeg)
2008-09-16 06:05 UTC, Jakub Liput
Details
dmesg from 2.6.21.7 with ACPI (43.46 KB, application/octet-stream)
2008-09-17 07:40 UTC, Jakub Liput
Details
new four screenshots, where system hangs (with DSDT) (278.59 KB, image/jpeg)
2008-09-17 07:54 UTC, Jakub Liput
Details
debug patch: EC device is initialized after evaluating the _INI object (1.40 KB, patch)
2008-09-27 19:23 UTC, ykzhao
Details | Diff
Ignore the _INI object in course of ACPI initialization (757 bytes, patch)
2008-10-24 00:46 UTC, ykzhao
Details | Diff
dmesg of PC-BSD install cd on M51Ta (11.31 KB, application/octet-stream)
2008-10-28 11:18 UTC, Daniele Benucci
Details
git-bissect log m51ta (2.19 KB, application/octet-stream)
2008-11-29 13:00 UTC, Ondrej Kozina
Details
dsdt.txt (201.20 KB, text/plain)
2008-12-30 08:01 UTC, Anton
Details
ASUS M51Ta - lspci (2.60 KB, text/plain)
2009-01-05 03:55 UTC, Vadim Plessky
Details
ASUS M51Ta ( AMD Turion Ultra CPU, RS780 Host Bridge) - dmidecode (12.02 KB, text/plain)
2009-01-05 04:01 UTC, Vadim Plessky
Details
ASUS M51Ta ( AMD Turion Ultra, RS780 HB) - Fedora 10 dmesg output with ACPI=OFF (39.23 KB, text/plain)
2009-01-05 04:06 UTC, Vadim Plessky
Details
acpidump for ASUS M51Ta (AMD Turion Ultra) (227.93 KB, text/plain)
2009-01-06 04:04 UTC, Vadim Plessky
Details
DMESG from Ubuntu 9.04 Alpha 2 (kernel 2.6.28) boot, option "maxcpus=1" (50.59 KB, text/plain)
2009-01-06 04:20 UTC, Vadim Plessky
Details
DSDT.DAT for ASUS M51Ta extracted with acpixtract utility from iASL package (47.12 KB, application/octet-stream)
2009-01-12 09:11 UTC, Vadim Plessky
Details
Fix mtrr debug/show boot parameter (786 bytes, patch)
2009-01-20 01:40 UTC, Thomas Renninger
Details | Diff
Instead of reverting the offending patch, you may want to add this one on top and boot with bootparam: disable_mtrr_save (1.15 KB, patch)
2009-01-21 04:48 UTC, Thomas Renninger
Details | Diff
dmesg (33.44 KB, text/plain)
2009-01-21 07:25 UTC, Ondrej Kozina
Details
[PATCH] x86: mtrr: don't modify RdDram/WrDram bits of fixed MTRRs (4.16 KB, patch)
2009-03-03 03:29 UTC, herrmann.der.user
Details | Diff
x86: powernow-k8: determine exact CPU frequency for HW Pstates (2.40 KB, patch)
2009-03-03 06:20 UTC, herrmann.der.user
Details | Diff
dmesg output for 2.6.29 kernel with patch 20412 (47.03 KB, text/plain)
2009-03-04 04:12 UTC, Paul
Details
debug patch to print fixed mtrr settings (1.93 KB, patch)
2009-03-04 07:05 UTC, herrmann.der.user
Details | Diff
dmesg output for 2.6.29 kernel with patch 20427 (52.58 KB, text/plain)
2009-03-04 10:55 UTC, Paul
Details

Description Jakub Liput 2008-09-11 09:33:20 UTC
Latest working kernel version: 2.6.21.5 (maybe other, but not tested)

Earliest failing kernel version: 2.6.24.5 (maybe other, but not tested)

Distribution: Slackware

Hardware Environment: Asus M51TR-AP003C notebook:
CPU: AMD Turion X2 Ultra Dual-Core Mobile ZM-80 (2.1 GHz)
Chipset: AMD 780G (Puma platform)
RAM: 3GB
Hybrid Graphics: Mobility Radeon HD 3400 and Radeon HD 3200

Software Environment: standard Slackware 12.1 software

Problem Description:

Can't boot Linux with ACPI - kernel freezes.
Some system messages before system freezes:
(...)
ACPI: bus type pci registered
PCI: MCFG configuration 0: base e0000000 segment 0 buses 0 - 255
PCI: Not using MMConfig
PCI: PCI BIOS revision 3.00 entry at 0xf0031, last bus=8
PCI: Using configuration type 1 for base access
PCI: Using configuration type 1 for extended access
mtrr: your CPUs had inconsistent fixed MTRR settings
mtrr: propably your BIOS does not setup all CPUs.
mtrr: corrected configuration.
evgpeblk-0956 [00] ev_create_gpe_block    : GPE 00 to 1F [_GPE] 4 regs on int 0x9
ACPI: EC: EC description table is found, configuring boot EC
nssearch-0336 [00] ns-search-and-enter    : Found bad character(s) in name, repaired: [*_SB]
Completing Region/Field/Buffer/Package initialization: ....................................................................................
Initialized 50/50 Regions 17/17 Fields 32/32 Buffers 45/45 Packages (1494 inodes)
Initializing Device/Processor/Thermal objects by executing _INI methods:...

And here system stops.

Linux can boot normally with "acpi=off" option, but there is a warning message in dmesg:

powernow-k8: Your BIOS does not provide ACPI _PSS objects in a way that Linux understands. Please report this to the Linux ACPI maintainers and complain to your BIOS vendor.

My AMI BIOS version is from July 2008.

Steps to reproduce:
Launch 2.6.26.x or 2.6.27-rcx kernel with ACPI on Asus M51TR notebook.
Comment 1 ykzhao 2008-09-11 17:39:02 UTC
Will you please add the following boot options and see whether the system can be booted normally?
   a. idle=poll
   b. nolapic_timer
   c. processor.max_cstate=1 ( Had better compile the processor as the built-in kenrel module. Please set CONFIG_ACPI_PROCESSOR=y in kernel configuration.)
   d. nohz=off (Disable tickless-feature)


   It will be great if you can attach the output of acpidump.
   Thanks.
   
Comment 2 Jakub Liput 2008-09-12 04:53:39 UTC
Created attachment 17747 [details]
acpidump - kernel 2.6.27-rc6 (acpi=off)

Executed on Linux 2.6.27-rc5 with "acpi=off" boot option.
Comment 3 Jakub Liput 2008-09-12 04:56:23 UTC
(In reply to comment #1)
> Will you please add the following boot options and see whether the system can
> be booted normally?
>    a. idle=poll
>    b. nolapic_timer
>    c. processor.max_cstate=1 ( Had better compile the processor as the built-in
> kenrel module. Please set CONFIG_ACPI_PROCESSOR=y in kernel configuration.)
>    d. nohz=off (Disable tickless-feature)
> 
> 
>    It will be great if you can attach the output of acpidump.
>    Thanks.
> 
> 

Unfortunately kernel doesn't boot with any of these options...
Only with "acpi=off".
I've attached acpidump in previous message.
Comment 4 ykzhao 2008-09-12 08:10:04 UTC
Will you please add the boot option of "initcall_debug" and capture the picture of the screen when the system hangs?
thanks.
Comment 5 Jakub Liput 2008-09-13 02:40:11 UTC
Created attachment 17759 [details]
Photo of a screen where Linux freezes

Photo of a screen where Linux freezes. (Linux 2.6.27-rc5)
(I didn't know the other way of capture this screen. Sorry if there is a better one :) )
Comment 6 ykzhao 2008-09-15 22:51:19 UTC
Created attachment 17798 [details]
try the custom DSDT

Will you please try the attached DSDT and see whether the system still hangs?
How to use the custom DSDT can be found in:
http://www.lesswatts.org/projects/acpi/faq.php

In the attached DSDT the GETD method won't be called again in the _INI object of VGA device. 
   From the DSDT it seems that the system will trigger SMI operation in the GETD method.
   

Thansk
Comment 7 Jakub Liput 2008-09-16 06:05:12 UTC
Created attachment 17805 [details]
screenshot #2

Thanks for this DSDT - it solved some problems, but unfortunately kernel still hangs - this time in another place.
I've attached screenshots from Linux 2.6.27-rc6 with "initcall_debug" and without.
As You can see, system freezes after "io scheduler cfq..." - I've tried to compile Linux without CFQ and other IO Schedulers, but it still doesn't work.
When I boot system without ACPI, it works. After "io scheduler cfq registered (default)" next three lines are:
pci 0000:02:00.0 Boot video device
pcieport-driver 0000:00:02.0: setting latency timer to 64
pcieport-driver 0000:00:02.0 found MSI capability
(...)
Comment 8 Len Brown 2008-09-16 15:02:29 UTC
please attach the dmesg -s64000 from the latest kernel that boots
with ACPI enabled.

It would be helpful if if you could isolate which exact release
broke this laptop, or ideal if you can git bisect which
commit caused the regression.
Comment 9 ykzhao 2008-09-16 18:42:45 UTC
Hi, Jakub
   Will you please add the following boot option and see whether the system will hangs? The custom DSDT is still required and the boot option of "initcall_debug" is always added.
   a. nolapic_timer
   b. idle=poll
   c. processor.max_cstate=1
   d. nohz=off(disable Tickless feature)

   If the system still hangs, please attach the screen picture for every boot option.
   thanks.
Comment 10 Jakub Liput 2008-09-17 07:40:07 UTC
Created attachment 17838 [details]
dmesg from 2.6.21.7 with ACPI

I've testes some kernels and:
- the lastest version that runs with ACPI is 2.6.21.7 (tested with and without DSDT modifications)
- the earliest version that doesn't run with ACPI is 2.6.22-rc1

I've attached dmesg from 2.6.21.7 (without DSDT modification).
Comment 11 Jakub Liput 2008-09-17 07:54:25 UTC
Created attachment 17839 [details]
new four screenshots, where system hangs (with DSDT)

Hi, Yakui

Unfortunately system still hangs. I've attached four screenshots (created with various options).
Comment 12 ykzhao 2008-09-27 02:18:48 UTC
Hi, Jakub
    Sorry for the late response.
    From the log in comment #10 the 2.6.21.7 kernel can be booted with ACPI. After  checking the ACPI table I find that the ECDT table is incorrect.
    >Namepath : \\_SB.PCI0.SBRG.EC0
    In fact the namepath should be \_SB.PCI0.SBRG.EC0.
    Because of the above error the EC device is not initialized before evaluating the _INI object on the 2.6.21.7 kernel.
    But from the 2.6.22-rc1 kernel the EC device will be initialized before evaluating the _INI object as there exists the ECDT table.
    
    I don't know why the system is broken by initializing EC device before evaluating the _INI object. 
    Maybe it is related with the BIOS.
Comment 13 ykzhao 2008-09-27 02:31:48 UTC
Hi, Jakub
    From the attached screenshots it seems that the system hangs in the function of pci_init, in which some quirks function will be called for the corresponding PCI device.
    I also can't understand why the PCI quirk function is related with the EC initialization order. In kernel 2.6.21.7 the EC device is initialized after evaluating _INI object. But from the kernel 2.6.22-rc1 the EC device is initialized on your laptop before evaluating the _INI object. (In the _INI object of VGA Device the SMI is triggered).
    
    From the screenshot in comment #5 we can know that the system will hang in evaluating the _INI object after the initializing EC device.
    Maybe this is related with BIOS.
    Please confirm whether the system can be fixed by upgrading BIOS.
    thanks.
    
    
Comment 14 ykzhao 2008-09-27 02:39:53 UTC
Hi, Jakub
    From the attached screenshots in comment #11 it seems that the system hangs in the function of pci_init after the custom DSDT is used, in which some quirks function will be called for the corresponding PCI device. (In the custom DSDT the _INI object of VGA device is skipped.)
    I also can't understand why the PCI quirk function is related with the EC
initialization order. In kernel 2.6.21.7 the EC device is initialized after
evaluating _INI object. But from the kernel 2.6.22-rc1 the EC device is
initialized on your laptop before evaluating the _INI object. (In the _INI
object of VGA Device the SMI is triggered).

    From the screenshot in comment #5 we can know that the system will hang in
evaluating the _INI object after the initializing EC device.(the custom DSDT table is not used).

    Maybe this is related with BIOS.
    Please confirm whether the system can be fixed by upgrading BIOS.
    thanks.
Comment 15 ykzhao 2008-09-27 19:23:30 UTC
Created attachment 18086 [details]
debug patch: EC device is initialized after evaluating the _INI object

In the 2.6.21.7 kernel the EC device is initialized after evaluating the _INI object, the system can be booted normally.
    Will you please try this debug patch on the latest kernel and see whether the system can be booted?
    In this debug patch the EC device is forced to be initialized after evaluating the _INI object.
    Thanks.
Comment 16 Jakub Liput 2008-10-03 13:37:50 UTC
Hello,
Sorry for a late reply, but these days I've got problems with internet connection.
Thanks for a patch, but unfortunately it doesn't fix the bug. I tried compiling both 
with custom DSDT. There are messages from the screen, where system hangs (these days I also don't have a digital camera):

with custom DSDT:

calling init_udf_fs+0xx/0x49
initcall init_udf_fs+0x0/0x49 returned 0 after 0 msecs
calling ipc_init+0x0/0x1c
mgmni has been set to 1731
initcall ipc_init+0x0/0x1c returned 0 after 0 msecs
calling ipc_sysctl_init+0x0/0xd
initcall ipc_sysctl_init+0x0/0xd returned 0 after 0 msecs
calling init_mqueue_fs+0x0/0xa5
initcall init_mqueue_fs+0x0/0xa5 returned 0 after 0 msecs
calling noop_init+0x0/0xd
io scheduler noop registered
initcall noop_init+0x0/0xd returned 0 after 0 msecs
calling as_init+0x0/0xd
io scheduler deadline registered
initcall deadline_init+0x0/0xd returned 0 after 0 msecs
calling cfq_init+0x0/0x84
io scheduler cfq registered (default)
initcall cfq_init+0x0/0x84 returned 0 after 0 msecs
calling percpu_counter_startup+0x0/0xd
initcall percpu_counter_startup+0x0/0xd returned 0 after 0 msecs
calling pci_init+0x0/0x28
_

without custom DSDT:

calling param_sysfs_init+0x0/0x147
initcall param_sysfs_init+0x0/0x147 returned 0 after 11 msecs
calling pm_sysrq_init+0x0/0x12
initcall pm_sysrq_init+0x0/0x12 returned 0 after 0 msecs
calling readahead_init+0x0/0x29
initcall readahead_init+0x0/0x29 returned 0 after 0 msecs
calling init_bio+0x0/0xa0
initcall init_bio+0x0/0xa0 returned 0 after 0 msecs
calling blk_settings_init+0x0/0x19
initcall blk_settings_init+0x0/0x19 returned 0 after 0 msecs
calling blk_ioc_init+0x0/0x22
initcall blk_ioc_init+0x0/0x22 returned 0 after 0 msecs
calling genhd_device_init+0x0/0x3d
initcall genhd_device_init+0x0/0x3d returned 0 after 0 msecs
calling pci_slot_init+0x0/0x37
initcall pci_slot_init+0x0/0x37 returned 0 after 0 msecs
calling fbmem_init+0x0/0x74
initcall fbmem_init+0x0/0x74 returned 0 after 0 msecs
calling acpi_init+0x0/0x220
evgpeblk-0957 [00] ev_create_gpe_block   : GPE 00 to 1F [_GPE] 4 regs on int 0x9
Completing Region/Field/Buffer/Package initialization:..........................
................................................................................
........................................
Initialized 50/50 Regions 17/17 Fields 32/32 Buffers 45/45 Packages (1494 nodes)
Initializing Device/Processor/Thermal objects by executing _INI methods:..._

Unfortunately, there is no BIOS update available - on Asus website there is only BIOS 204, which I already have.
Comment 17 Reinier Lamers 2008-10-15 01:04:19 UTC
I am experiencing this problem too. Is there any info that you still need?
Comment 18 Daniele Benucci 2008-10-20 00:42:06 UTC
I am experiencing this problem too on a M51Ta notebook (AFAIK same hardware but HD3650 video card). Yesterday I noticed that 207 bios has been released for M51Tr (unfortunately not for M51Ta, even though I think it should be the same code...). Has anyone tried if this update solves the problem?
Comment 19 Jakub Liput 2008-10-23 10:48:43 UTC
Hello.
I've tried new BIOS (207) on my M51Tr, but unfortunately it doesn't solve the problem.
Comment 20 ykzhao 2008-10-24 00:46:46 UTC
Created attachment 18423 [details]
Ignore the _INI object in course of ACPI initialization

Will you please try the debug patch and see whether the problem still exists?
Thanks.
Comment 21 Daniele Benucci 2008-10-28 11:18:19 UTC
Created attachment 18481 [details]
dmesg of PC-BSD install cd on M51Ta

I tried, just for curiosity, to boot my M51Ta with PC-BSD 7.0.1 install cd and (surprisingly?) it works with ACPI support.
I don't know if this info can be useful to solve this bug in Linux, but I'm attaching the output of dmesg hoping that it could be.
(btw I didn't test with an installed PC-BSD too both because of lack of a free partition to install and of the video card not supported by the graphical installer)
Comment 22 Jakub Liput 2008-10-28 15:18:38 UTC
(In reply to comment #20)

> Will you please try the debug patch and see whether the problem still exists?
> Thanks.

Thanks for patch, but unfortunately it still doesn't fix the bug (compiled with Linux 2.6.27.3).
My dmesg seems to be the same, as the last dmesg that I attached (with ACPI):

(...)
calling init_udf_fs+0xx/0x49
initcall init_udf_fs+0x0/0x49 returned 0 after 0 msecs
calling ipc_init+0x0/0x1c
mgmni has been set to 1731
initcall ipc_init+0x0/0x1c returned 0 after 0 msecs
calling ipc_sysctl_init+0x0/0xd
initcall ipc_sysctl_init+0x0/0xd returned 0 after 0 msecs
calling init_mqueue_fs+0x0/0xa5
initcall init_mqueue_fs+0x0/0xa5 returned 0 after 0 msecs
calling noop_init+0x0/0xd
io scheduler noop registered
initcall noop_init+0x0/0xd returned 0 after 0 msecs
calling as_init+0x0/0xd
io scheduler deadline registered
initcall deadline_init+0x0/0xd returned 0 after 0 msecs
calling cfq_init+0x0/0x84
io scheduler cfq registered (default)
initcall cfq_init+0x0/0x84 returned 0 after 0 msecs
calling percpu_counter_startup+0x0/0xd
initcall percpu_counter_startup+0x0/0xd returned 0 after 0 msecs
calling pci_init+0x0/0x28
Comment 23 Zhang Rui 2008-11-25 18:52:38 UTC
*** Bug 11737 has been marked as a duplicate of this bug. ***
Comment 24 Zhang Rui 2008-11-25 18:57:29 UTC
the problem doesn't exist in 2.6.21.7.
the problem exists in 2.6.22-rc1.
can anybody try to use git-bisect to find out the commit that introduces this bug please?

how to use git-bisect can be found at:
http://www.lesswatts.org/projects/acpi/debug.php
Comment 25 snacksou 2008-11-28 10:37:30 UTC
Hello,

i have the same laptop (asus m51tr) and i think i've the same problem. Without acpi=off, kernel freeze at (sorry, i'm new on this website, i don't how to create an "attachment" so let me give you my picture on my webspace):
http://snacksou33.free.fr/28112008161.jpg

Whatever the option (idle=pool, nolapic_timer, processor.name_cstate=1, nohz=off), it still freeze. I'm with 2.6.26-1-amd64 kernel. I didn't find any dsdt for this laptop.

So, is there a fix for this problem now, or....?

My apologize for my english, it's not my foreign language...

Thks.
Comment 26 Len Brown 2008-11-28 15:44:41 UTC
please try booting with "pci=nommconf"
Comment 27 slavo 2008-11-28 16:59:05 UTC
thanks, but on M51Ta does ot work ... :(
Comment 28 snacksou 2008-11-29 05:28:59 UTC
neither on mine. Still freeze on the same instruction...
Comment 29 Ondrej Kozina 2008-11-29 12:58:17 UTC
(In reply to comment #24)
> the problem doesn't exist in 2.6.21.7.
> the problem exists in 2.6.22-rc1.
> can anybody try to use git-bisect to find out the commit that introduces this
> bug please?
> 
> how to use git-bisect can be found at:
> http://www.lesswatts.org/projects/acpi/debug.php
> 

Hello,

I suppose this is the commit, which has broken ACPI on M51Ta
[2b1f6278d77c1f2f669346fc2bb48012b5e9495a]

Comment 30 Ondrej Kozina 2008-11-29 13:00:35 UTC
Created attachment 19075 [details]
git-bissect log m51ta

git-bisect log
Comment 31 snacksou 2008-11-30 13:35:14 UTC
Hello,

i've tried with nosmp and nolapic options ans then i can boot. But i've got only one cpu and i think that my battery is not so powerfull as before (less autonomy) which is useless for a laptop :(
Comment 32 Len Brown 2008-11-30 19:41:21 UTC
Ondrej, thanks for the bisect.
If b1f6278d77c1f2f669346fc2bb48012b5e9495a is at fault,
then this is an MTRR related issue.  Does your system
boot a kernel built with CONFIG_MTRR=n?
Comment 33 Ondrej Kozina 2008-12-01 11:09:53 UTC
confirmed. I can boot kernel with acpi when kernel is compiled with CONFIG_MTRR=n. Should i post some further debug info?
Comment 34 snacksou 2008-12-01 15:22:46 UTC
also confirm that with CONFIG_MTRR=n and kernel 2.6.27.7 on a asus m51tr it works great :) both cpu, automatic halt, ect... Thanks a lot for this fix ;-)

See you.
Comment 35 ykzhao 2008-12-02 00:15:53 UTC
Thanks for the test and confirmation.

It seems that the system can work well w/o ACPI enabled if CONFIG_MTTR is disabled in kernel configuration. So it will be assigned to the MTTR category of memory management.
Comment 36 Zhang Rui 2008-12-02 00:28:11 UTC
don't know if this is on Rafael's regression list.
cc Rafael.
Comment 37 Anton 2008-12-30 07:51:22 UTC
/usr/src/linux-2.6.28-gentoo/arch/x86/kernel/cpu/mtrr/generic.c:218:	mtrr_state.have_fixed = 0;/*rba(lo >> 8) & 1;rba*/

aton ~ # cat /proc/mtrr
reg00: base=0x000000000 (    0MB), size= 1024MB, count=1: write-back
reg01: base=0x040000000 ( 1024MB), size=  512MB, count=1: write-back
reg02: base=0x060000000 ( 1536MB), size=  256MB, count=1: write-back


#################### /proc/acpi/video/VGA/LCDD/EDID
<not supported>
#################### /proc/acpi/video/VGA/LCDD/brightness
levels: 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
current: 0
#################### /proc/acpi/video/VGA/LCDD/state
state: 0x1f
query: 0x01
#################### /proc/acpi/video/VGA/LCDD/info
device_id: 0x0110
type: UNKNOWN
known by bios: no
#################### /proc/acpi/video/VGA/DVID/EDID
<not supported>
#################### /proc/acpi/video/VGA/DVID/brightness
<not supported>
#################### /proc/acpi/video/VGA/DVID/state
state: 0x1d
query: 0x00
#################### /proc/acpi/video/VGA/DVID/info
device_id: 0x0210
type: UNKNOWN
known by bios: no
#################### /proc/acpi/video/VGA/CRTD/EDID
<not supported>
#################### /proc/acpi/video/VGA/CRTD/brightness
<not supported>
#################### /proc/acpi/video/VGA/CRTD/state
state: 0x1d
query: 0x00
#################### /proc/acpi/video/VGA/CRTD/info
device_id: 0x0100
type: UNKNOWN
known by bios: no
#################### /proc/acpi/video/VGA/DOS
DOS setting: <0>
#################### /proc/acpi/video/VGA/POST
<not supported>
#################### /proc/acpi/video/VGA/POST_info
<not supported>
#################### /proc/acpi/video/VGA/ROM
#################### /proc/acpi/video/VGA/info
Switching heads: yes
Video ROM: no
Device to be POSTed on boot: no
#################### /proc/acpi/wakeup
Device S-state Status Sysfs node
SBAZ S4 disabled pci:0000:00:14.2
UHC1 S4 disabled pci:0000:00:12.0
UHC2 S4 disabled pci:0000:00:12.1
UHC3 S4 disabled pci:0000:00:12.2
USB4 S4 disabled pci:0000:00:13.0
UHC5 S4 disabled pci:0000:00:13.1
UHC6 S4 disabled pci:0000:00:13.2
UHC7 S4 disabled pci:0000:00:14.5
PCE4 S4 disabled pci:0000:00:04.0
PCE5 S4 disabled pci:0000:00:05.0
GLAN S4 disabled pci:0000:04:00.0
PCE6 S4 disabled pci:0000:00:06.0
PCE2 S4 disabled pci:0000:00:02.0
P0PC S4 disabled pci:0000:00:14.4
PWRB S4 *enabled
SLPB S4 *enabled
#################### /proc/acpi/sleep
S0 S3 S4 S5
#################### /proc/acpi/thermal_zone/THRM/polling_frequency
<polling disabled>
#################### /proc/acpi/thermal_zone/THRM/cooling_mode
0 - Active; 1 - Passive
#################### /proc/acpi/thermal_zone/THRM/trip_points
critical (S5): 108 C
passive: 105 C: tc1=2 tc2=10 tsp=100 devices=P001 P002
#################### /proc/acpi/thermal_zone/THRM/temperature
temperature: 59 C
#################### /proc/acpi/thermal_zone/THRM/state
state: ok
#################### /proc/acpi/processor/P002/power
active state: C0
max_cstate: C8
bus master activity: 00000000
maximum allowed latency: 2000000000 usec
#################### /proc/acpi/processor/P002/limit
<not supported>
#################### /proc/acpi/processor/P002/throttling
<not supported>
#################### /proc/acpi/processor/P002/info
processor id: 1
acpi id: 2
bus mastering control: yes
power management: no
throttling control: no
limit interface: no
#################### /proc/acpi/processor/P001/power
active state: C0
max_cstate: C8
bus master activity: 00000000
maximum allowed latency: 2000000000 usec
C1: type[C1] promotion[--] demotion[--] latency[000] usage[00000000] duration[00000000000000000000]
#################### /proc/acpi/processor/P001/limit
active limit: P0:T0
user limit: P0:T0
thermal limit: P0:T0
#################### /proc/acpi/processor/P001/throttling
state count: 8
active state: T0
state available: T0 to T7
*T0: 100%
T1: 87%
T2: 75%
T3: 62%
T4: 50%
T5: 37%
T6: 25%
T7: 12%
#################### /proc/acpi/processor/P001/info
processor id: 0
acpi id: 1
bus mastering control: yes
power management: no
throttling control: yes
limit interface: yes
#################### /proc/acpi/button/lid/LID/state
state: open
#################### /proc/acpi/button/lid/LID/info
type: Lid Switch
#################### /proc/acpi/button/sleep/SLPB/info
type: Sleep Button (CM)
#################### /proc/acpi/button/power/PWRB/info
type: Power Button (CM)
#################### /proc/acpi/button/power/PWRF/info
type: Power Button (FF)
#################### /proc/acpi/battery/BAT0/alarm
alarm: unsupported
#################### /proc/acpi/battery/BAT0/state
present: yes
capacity state: ok
charging state: charged
present rate: 0 mW
remaining capacity: 47344 mWh
present voltage: 12403 mV
#################### /proc/acpi/battery/BAT0/info
present: yes
design capacity: 52800 mWh
last full capacity: 48345 mWh
battery technology: rechargeable
design voltage: 11100 mV
design capacity warning: 5280 mWh
design capacity low: 1584 mWh
capacity granularity 1: 528 mWh
capacity granularity 2: 528 mWh
model number: F3---24
serial number:
battery type: LIon
OEM info: ASUSTEK
#################### /proc/acpi/ac_adapter/AC0/state
state: on-line
#################### /proc/acpi/event
cat: /proc/acpi/event: Device or resource busy
#################### /proc/acpi/fadt
#################### /proc/acpi/dsdt
ANVI pASMIh`
1SMBB zh
1SMBW zh
SMBK zh
ECRW zh
BS_A [
TOPM ROMS MG1B MG1L MG2B MG2L
HPTA CPB0 CPB1 CPB2 CPB3 ASSB
AAXB SMIF
MG3B MG3L MH1B MH1L
Windows 2000
Windows 2001
Windows 2001 SP1
Windows 2001 SP2
Windows 2001.1
Windows 2001.1 SP1
Windows 2006
Microsoft Windows NT
Microsoft WindowsME: Millennium Edition
@0MI__ MD__
HI__ HD__
@&MCI_ MCD_ [
H PCE4
SCAP SCTL
N _PS0
K _PS0
SWHD p
O CBS0
XCFG ['MUTE
XCFG piXCFG['MUTE
XCFG {XCFGja}aiXCFG['MUTE
SBRV WBOV
RPIN {h
SWTC pUKER`p
L RBEP
@ WBEP
A ECAV
RFOV p
RBOV p
(DCPS pGPWS`
ISMI phSMCM
ASMI phALPRp
RAMB AVOL
FADR FSIZ
DBR1 DBR2 DBR3 DBR4 LCDV LCDR
BIPA RTCW
ALPR PSTN
GNBF HDDF
Windows 2001
Windows 2001 SP1
Windows 2001 SP2
Windows 2006
Microsoft Windows
Microsoft WindowsME: Millennium Edition
Microsoft Windows NT
GGCC BATShp^/
"CHGS p/
BLK1 BLK2 BLK3 BLK4 BLK5 BLK6 BLK7 BLK8 p^^/
BSMI phBIPAISMI
BLK1 BLK2 BLK3 BLK4 BLK5 BLK6 BLK7 BLK8
LDI0 LDI1 p
THRI THR1 p
NMFN p
ODPI ODPC
ODPM {ODPM
MDL1 MDL2 MDL3 MDL4 p
BDL1 BDL2 BDL3 BDL4 p
EDL1 EDL2 EDL3 EDL4 p
LDI0 LDI1 p
-DCPS p/
PRJW p
!OWLD phWRSTph/
SBTL /
#################### /proc/acpi/info
version: 20080926
#################### /proc/acpi/embedded_controller/EC0/info
gpe: 0x0e
ports: 0x66, 0x62
use global lock: no
Comment 38 Anton 2008-12-30 08:01:19 UTC
Created attachment 19546 [details]
dsdt.txt

aton ~ # hexdump -C /proc/acpi/fadt
00000000  46 41 43 50 84 00 00 00  02 ad 30 38 32 39 30 38  |FACP......082908|
00000010  46 41 43 50 30 39 35 37  29 08 08 20 4d 53 46 54  |FACP0957).. MSFT|
00000020  97 00 00 00 00 e0 f9 6f  80 06 f9 6f 01 02 09 00  |.......o...o....|
00000030  b0 00 00 00 e1 1e 00 e2  00 08 00 00 00 00 00 00  |................|
00000040  04 08 00 00 00 00 00 00  ff 08 00 00 08 08 00 00  |................|
00000050  20 08 00 00 00 00 00 00  04 02 01 04 08 00 00 00  | ...............|
00000060  65 00 e9 03 00 04 10 00  01 03 0d 00 32 03 00 00  |e...........2...|
00000070  a5 c1 01 00 01 08 00 00  f9 0c 00 00 00 00 00 00  |................|
00000080  06 00 00 00                                       |....|
00000084
Comment 39 Vadim Plessky 2009-01-05 03:43:30 UTC
Hello,

I have ASUS M51Ta laptop with AMD Turion Ultra processor (ZM-84) - AMD Family 11h.
And I can confirm that this problem is present in 2.6.27.x kernel
Tested: Fedora 10, Mandriva 2009, OpenSuSE 11.1, Ubuntu 8.10

Filed corresponding bug reports:
https://bugzilla.redhat.com/show_bug.cgi?id=477978
https://qa.mandriva.com/show_bug.cgi?id=46639
https://bugzilla.novell.com/show_bug.cgi?id=462637

My understanding that "AMD Family 11h" is supported in Linux kernel 2.6.28.
And problem should be fixed by now.

Reference to Release Notes:

6. Tracing/Profiling

OProfile
    *  Add support for AMD Family 11h

Can someone confirm that problem has been fixed in kernel 2.6.28?
If yes - are there any plans to backport changes to kernel 2.6.27, as it used by latest versions of all major distributions?

Comment 40 Vadim Plessky 2009-01-05 03:47:58 UTC
Following bugs filed for OpenSuSE may be related to this:

1) System freeze after 10.3 -> 11.0 upgrade for ACPI conflict
https://bugzilla.novell.com/show_bug.cgi?id=411797

2) C1 state unsupported on modern AMD mobile CPUs
https://bugzilla.novell.com/show_bug.cgi?id=432809

3) AMD Sempron 3500/3600+ needs highres=off and nohz=off boot params
https://bugzilla.novell.com/show_bug.cgi?id=396220

Comment 41 Vadim Plessky 2009-01-05 03:55:32 UTC
Created attachment 19657 [details]
ASUS M51Ta - lspci

ASUS M51Ta - lspci output

* AMD Turion Ultra ZM-84
* RS780 Host Bridge
* Advanced Micro Devices [AMD] Family 11h HyperTransport Configuration (rev 40)
Comment 42 Vadim Plessky 2009-01-05 04:01:19 UTC
Created attachment 19658 [details]
ASUS M51Ta ( AMD Turion Ultra CPU, RS780 Host Bridge) - dmidecode


* AMD Turion Ultra (ZM-84) processor
* AMD RS780 Host Bridge
* Host bridge: Advanced Micro Devices [AMD] Family 11h HyperTransport Configuration (rev 40)
Comment 43 Vadim Plessky 2009-01-05 04:06:02 UTC
Created attachment 19659 [details]
ASUS M51Ta ( AMD Turion Ultra, RS780 HB) - Fedora 10 dmesg output with ACPI=OFF

ASUS M51Ta ( AMD Turion Ultra CPU, RS780 Host Bridge) - Fedora 10 dmesg output with ACPI=OFF

* AMD Turion Ultra (ZM-84) processor
* AMD RS780 Host Bridge
* Host bridge: Advanced Micro Devices [AMD] Family 11h HyperTransport
Configuration (rev 40)

With ACPI=OFF, system heats enermously.
Comment 44 Vadim Plessky 2009-01-06 03:52:43 UTC
I tested Ubuntu 9.04 Alpha 2 (kernel 2.6.28) on ASUS M51Ta laptop.
Despite it has kernel 2.6.28, which is supposed to support AMD Family 11h procesors, boot procedure hangs.

I forced parameter "maxcpus=1" and was able to boot after it.
ACPI was working, but processor was at 100% of CPU frequency 
(active state:  T0)

Here are dteails what was available after boot with 1 CPU:

#ls /proc/acpi
ac_adapter
battery
button
dsdt
embedded_controller
event
fadt
fan
info
power_resource
processor
sleep
thermal_zone
video
wakeup

# cat /proc/acpi/processor/P001/info
processor id:            0
acpi id:                 1
bus mastering control:   yes
power management:        no
throttling control:      yes
limit interface:         yes

# cat /proc/acpi/processor/P001/limit
active limit:            P0:T0
user limit:              P0:T0
thermal limit:           P0:T0

# cat /proc/acpi/processor/P001/power
active state:            C0
max_cstate:              C8
bus master activity:     00000000
maximum allowed latency: 2000000000 usec
states:
    C1:                  type[C1] promotion[--] demotion[--] latency[000] usage[00000000] duration[00000000000000000000]

# cat /proc/acpi/processor/P001/throttling
state count:             8
active state:            T0
state available: T0 to T7
states:
   *T0:                  100%
    T1:                  87%
    T2:                  75%
    T3:                  62%
    T4:                  50%
    T5:                  37%
    T6:                  25%
    T7:                  12%

Comment 45 Vadim Plessky 2009-01-06 04:04:17 UTC
Created attachment 19675 [details]
acpidump for ASUS M51Ta (AMD Turion Ultra)


ACPI dump has been made after booting with 2.6.28 kernel (Ubuntu 8.04 Alpha 2), option "maxcpus=1".

from /proc/cpuinfo:
processor	: 0
vendor_id	: AuthenticAMD
cpu family	: 17
power management: ts ttp tm stc 100mhzsteps hwpstate

CPU works at full frequency, and system heats - but less than with ACPI=off

# sensors
acpitz-virtual-0
Adapter: Virtual device
temp1:       +73.0В°C  (crit = +108.0В°C)
Comment 46 Vadim Plessky 2009-01-06 04:20:57 UTC
Created attachment 19676 [details]
DMESG from Ubuntu 9.04 Alpha 2 (kernel 2.6.28) boot, option "maxcpus=1"


from DMESG:

[    0.000000] BIOS EBDA/lowmem at: 0009fc00/0009fc00
[    0.000000] Initializing cgroup subsys cpuset
[    0.000000] Initializing cgroup subsys cpu
[    0.000000] Linux version 2.6.28-3-generic (buildd@palmer) (gcc version 4.3.3 20081210 (prerelease) (Ubuntu 4.3.2-2ubuntu8) ) #4-Ubuntu SMP Fri Dec 12 22:48:15 UTC 2008 (Ubuntu 2.6.28-3.4-generic)

...

[    0.000000] ACPI: RSDP 000FA3C0, 0014 (r0 ACPIAM)
[    0.000000] ACPI: RSDT AFF80000, 004C (r1 _ASUS_ Notebook 20080909 MSFT       97)
[    0.000000] ACPI: FACP AFF80200, 0084 (r2 090908 FACP1039 20080909 MSFT       97)
[    0.000000] ACPI: DSDT AFF80680, BC7E (r1  M51Ta M51Ta001        1 INTL 20051117)
[    0.000000] ACPI: FACS AFF8E000, 0040
[    0.000000] ACPI: APIC AFF80390, 005C (r1 090908 APIC1039 20080909 MSFT       97)
[    0.000000] ACPI: MCFG AFF80430, 003C (r1 090908 OEMMCFG  20080909 MSFT       97)
[    0.000000] ACPI: SLIC AFF80470, 0176 (r1 _ASUS_ Notebook 20080909 MSFT       97)
[    0.000000] ACPI: ECDT AFF80620, 0055 (r1 090908 OEMECDT  20080909 MSFT       97)
[    0.000000] ACPI: DBGP AFF803F0, 0034 (r1 090908 DBGP1039 20080909 MSFT       97)
[    0.000000] ACPI: BOOT AFF805F0, 0028 (r1 090908 BOOT1039 20080909 MSFT       97)
[    0.000000] ACPI: OEMB AFF8E040, 0071 (r1 090908 OEMB1039 20080909 MSFT       97)
[    0.000000] ACPI: HPET AFF8C300, 0038 (r1 090908 OEMHPET  20080909 MSFT       97)
[    0.000000] ACPI: SSDT AFF8C340, 0386 (r1 AMI    POWERNOW        1 AMD         1)
[    0.000000] ACPI: Local APIC address 0xfee00000

...

[    0.432001] ACPI: EC: EC description table is found, configuring boot EC
[    0.436657] ACPI: BIOS _OSI(Linux) query ignored
[    0.449340] ACPI: Interpreter enabled
[    0.449344] ACPI: (supports S0 S3 S4 S5)
[    0.449363] ACPI: Using IOAPIC for interrupt routing

...

[    1.887814] fuse init (API version 7.10)
[    1.989660] processor ACPI_CPU:00: registered as cooling_device0
[    1.989664] ACPI: Processor [P001] (supports 8 throttling states)
[    1.989716] processor ACPI_CPU:01: registered as cooling_device1
[    1.991474] ACPI: EC: non-query interrupt received, switching to interrupt mode
[    1.994688] thermal LNXTHERM:01: registered as thermal_zone0
[    1.996097] ACPI: Thermal Zone [THRM] (71 C)

...

[   96.704020] ACPI: Power Button (FF) [PWRF]
[   96.704151] input: Power Button (CM) as /devices/LNXSYSTM:00/device:00/PNP0C0C:00/input/input4
[   96.720042] ACPI: Power Button (CM) [PWRB]
[   96.720125] input: Sleep Button (CM) as /devices/LNXSYSTM:00/device:00/PNP0C0E:00/input/input5
[   96.736047] ACPI: Sleep Button (CM) [SLPB]
[   96.736154] input: Lid Switch as /devices/LNXSYSTM:00/device:00/PNP0C0D:00/input/input6
[   96.738589] ACPI: Lid Switch [LID]
[   96.801855] asus-laptop: Asus Laptop Support version 0.42
[   96.805245] asus-laptop:   M51Ta model detected
[   96.843516] asus-laptop: Brightness ignored, must be controlled by ACPI video driver
[   96.843568] Registered led device: asus::mail
[   97.104049] usb 6-2: new full speed USB device using ohci_hcd and address 3
[   97.278579] usb 6-2: configuration #1 chosen from 1 choice
[   97.318573] ACPI: AC Adapter [AC0] (on-line)
[   97.491998] ACPI: Battery Slot [BAT0] (battery present)
[   97.617063] acpi device:06: registered as cooling_device2
[   97.617226] input: Video Bus as /devices/LNXSYSTM:00/device:00/PNP0A03:00/device:02/device:03/input/input7
[   97.632042] ACPI: Video Device [VGA] (multi-head: yes  rom: no  post: no)

...

[  111.238166] ACPI: WMI: Mapper loaded
[  112.473484] powernow-k8: Found 1 AMD Turion(tm) X2 Ultra Dual-Core Mobile ZM-84 processors (1 cpu cores) (version 2.20.00)
[  112.473530] powernow-k8:    0 : pstate 0 (2300 MHz)
[  112.473532] powernow-k8:    1 : pstate 1 (1200 MHz)
[  112.473533] powernow-k8:    2 : pstate 2 (600 MHz)

Last section looks like strange- procesor has 8 power states
(state available: T0 to T7)

Is there powernow-k10 module available?
AMD Turion Ultra is from "AMD Family 11h" family of processors.
Comment 47 Yillkid 2009-01-08 18:40:17 UTC
(In reply to comment #12)
> Hi, Jakub
>     Sorry for the late response.
>     From the log in comment #10 the 2.6.21.7 kernel can be booted with ACPI.
> After  checking the ACPI table I find that the ECDT table is incorrect.
>     >Namepath : \\_SB.PCI0.SBRG.EC0
>     In fact the namepath should be \_SB.PCI0.SBRG.EC0.
>     Because of the above error the EC device is not initialized before
> evaluating the _INI object on the 2.6.21.7 kernel.
>     But from the 2.6.22-rc1 kernel the EC device will be initialized before
> evaluating the _INI object as there exists the ECDT table.
> 
>     I don't know why the system is broken by initializing EC device before
> evaluating the _INI object. 
>     Maybe it is related with the BIOS.
> 

Hi ykzhao :

There is no problem with ECDT,

You can find a example for "EC_ID" in ACPI spec. 30b / page 123

The example is "\\_SB.PCI0.ISA.EC" !

Linux kernel can not handle more than 1 backslash prefix ,but it is a Linux issue.

Refering the link, please :
http://www.acpica.org/bugzilla/show_bug.cgi?id=739
Comment 48 galek 2009-01-11 06:30:07 UTC
Old kernel is the solution.
.in debian net_install (2.6.18-6 - adm64) everything is ok (acpi,smp)- on asus M51TA.
but wifi drivers doesn't work, because  they are released on 2.6.27 up;/ (madwifi<2.6.27) on all new kernel's i still get bug with acpi/smp. i sugest - use older kernel ;))
sorry for my english by the way :))
Comment 49 Jakub Liput 2009-01-11 08:00:42 UTC
First: Thanks for the MTRR disabling solution!
Second: Excuse me for impatience, but if there is buggy commit found, is there a chance that this bug will be fixed in 2.6.28.x kernel series? (sure with MTRR support)

PS. Galek - this is not the solution, do You want to use the same version of kernel for years ;> ? On the other hand, there is MTRR support disabling solution, but everyone want to be able to use their favorite new versions of distributions out of box...
Comment 50 galek 2009-01-11 11:38:24 UTC
noooo. if your hardware is fully suprted by kernel you upgrade him for a new version? im not! i use 2.6.27 only for wifi support and a new ati drivers. for you, kernel upgrade is the challenge ?;) 
you heave right, probobly only solution is waiting for 2.6.28.x.
Work without smp or acpi makes me tired of doing this (@gentoo) ;/
Comment 51 Jakub Liput 2009-01-11 13:24:48 UTC
For me, new kernel means better hardware support, new features and sometimes better performance. Maybe You don't need to upgrade Your kernel, but it's not place for discussions like that. The point is better support for ACPI in our notebooks in new kernel releases.

Sorry for off topic.
Comment 52 Vadim Plessky 2009-01-12 09:11:03 UTC
Created attachment 19761 [details]
DSDT.DAT for ASUS M51Ta extracted with acpixtract utility from iASL package

Results of execution this DSDT.DAT in acpiexec (from iASL package)
Download:  http://www.acpica.org/downloads/

C:\Users\Vadim\Documents\ACPI\iasl-win-20081204>acpiexec dsdt.dat

Intel ACPI Component Architecture
AML Execution/Debug Utility version 20081204 [Dec  4 2008]

Loading Acpi table from file dsdt.dat
ACPI: RSDP @ 0x0044EEC0/0x0028 (v001 I_TEST)
ACPI: RSDT @ 0x001400F0/0x0040 (v000                 0x00000000      0x00000000)

ACPI: TEST @ 0x0044EF00/0x0024 (v001                 0x00000000      0x00000000)

ACPI: BAD! @ 0x0044EFC0/0x0024 (v001                 0x00000000      0x00000000)

ACPI: FACP @ 0x0044ECE0/0x00F4 (v003                 0x00000000      0x00000000)

ACPI: DSDT @ 0x007E0048/0xBC7E (v001  M51Ta M51Ta001 0x00000001 INTL 0x20051117)

ACPI: FACS @ 0x0044EDE0/0x0040
ACPI: TEST @ 0x0044EF00/0x0024 (v001                 0x00000000      0x00000000)

ACPI: SSDT @ 0x004437C0/0x0030 (v001  Intel     Many 0x00000001 INTL 0x20030424)

ACPI: SSDT @ 0x004437F0/0x0030 (v001  Intel     Many 0x00000001 INTL 0x20030424)

ACPI: OEM1 @ 0x00443850/0x0038 (v001  Intel     Many 0x00000001 INTL 0x20030918)

Parsing all Control Methods:
Table [DSDT](id 0001) - 1656 Objects with 77 Devices 536 Methods 64 Regions
Parsing all Control Methods:
Table [SSDT](id 0002) - 1 Objects with 0 Devices 1 Methods 0 Regions
Parsing all Control Methods:
Table [SSDT](id 0003) - 1 Objects with 0 Devices 1 Methods 0 Regions
 tbxface-0620 [02] TbLoadNamespace       : ACPI Tables successfully acquired
evgpeblk-1120 [04] EvCreateGpeBlock      : GPE 00 to 3F [_GPE] 8 regs on int 0x0

evgpeblk-1120 [04] EvCreateGpeBlock      : GPE 60 to 77 [_GPE] 3 regs on int 0x0

Completing Region/Field/Buffer/Package initialization:..........................
................................................................................
..................................................
Initialized 64/64 Regions 17/17 Fields 37/37 Buffers 38/38 Packages (1667 nodes)

Initializing Device/Processor/Thermal objects by executing _INI methods:......
Executed 6 _INI methods requiring 0 _STA executions (examined 82 objects)
evgpeblk-1223 [03] EvInitializeGpeBlock  : Found 5 Wake, Enabled 3 Runtime GPEs
in this block
evgpeblk-1223 [03] EvInitializeGpeBlock  : Found 0 Wake, Enabled 0 Runtime GPEs
in this block
-

***

So it looks DSDT table is ok. At least acpiexec can "execute" it.
I can add that system (ASUS M51Ta) boots with ACPI with FreeBSD. 
Therefor problem is indeed inside Linux kernel.

Hope it can be fixed soon.
Comment 53 galek 2009-01-12 12:00:37 UTC
in freebsd acpi is fully suported
-------------wiki/acpi
"Microsoft Windows 98 was the first operating system with full support for ACPI, with FreeBSD, the Linux kernel, NetBSD, OpenBSD and PC versions of Solaris all having at least some support for ACPI".
Freebsd & ASUS M51TA = missing 3d ATI ;/
sorry for my english ;/
Comment 54 Thomas Renninger 2009-01-19 02:01:53 UTC
Can you boot the machine MTRR compiled in, but with the offending git commit 2b1f6278d77c1f2f669346fc2bb48012b5e9495a reverted and add the boot param:
mtrr.show
and attach dmesg oupput, please.
Comment 55 Thomas Renninger 2009-01-20 01:40:39 UTC
Created attachment 19896 [details]
Fix mtrr debug/show boot parameter

The mtrr.show parameter is currently broken.
This patch has been send upstream.
Please do as described and also additionally add this patch:
  - remove the found, offending patch
  - add this patch
  - add boot param mtrr.show
This should make some reasonable debug info show up in dmesg.
Please attach dmesg output of the boot then.
Comment 56 Jakub Liput 2009-01-21 01:21:01 UTC
I'm trying to do this, but it's the first time I'm using GIT...

I downloaded the lastest git tree to some directory and I'm launching:

bash-3.1# git revert 2b1f6278d77c1f2f669346fc2bb48012b5e9495a
warning: too many files, skipping inexact rename detection
CONFLICT (delete/modify): arch/i386/kernel/cpu/mtrr/main.c deleted in HEAD and modified in 2b1f627... [PATCH] x86: Save the MTRRs of the BSP before booting an AP. Version 2b1f627... [PATCH] x86: Save the MTRRs of the BSP before booting an AP of arch/i386/kernel/cpu/mtrr/main.c left in tree.
CONFLICT (delete/modify): arch/i386/kernel/smpboot.c deleted in HEAD and modified in 2b1f627... [PATCH] x86: Save the MTRRs of the BSP before booting an AP. Version 2b1f627... [PATCH] x86: Save the MTRRs of the BSP before booting an AP of arch/i386/kernel/smpboot.c left in tree.
CONFLICT (delete/modify): arch/x86_64/kernel/smpboot.c deleted in HEAD and modified in 2b1f627... [PATCH] x86: Save the MTRRs of the BSP before booting an AP. Version 2b1f627... [PATCH] x86: Save the MTRRs of the BSP before booting an AP of arch/x86_64/kernel/smpboot.c left in tree.
CONFLICT (delete/modify): include/asm-i386/mtrr.h deleted in HEAD and modified in 2b1f627... [PATCH] x86: Save the MTRRs of the BSP before booting an AP. Version 2b1f627... [PATCH] x86: Save the MTRRs of the BSP before booting an AP of include/asm-i386/mtrr.h left in tree.
CONFLICT (delete/modify): include/asm-x86_64/mtrr.h deleted in HEAD and modified in 2b1f627... [PATCH] x86: Save the MTRRs of the BSP before booting an AP. Version 2b1f627... [PATCH] x86: Save the MTRRs of the BSP before booting an AP of include/asm-x86_64/mtrr.h left in tree.
Automatic revert failed.  After resolving the conflicts,
mark the corrected paths with 'git add <paths>' or 'git rm <paths>' and commit the result.

There are some error, so I think it's not working.
I can still search over internet for solution, but it will take some time. Could You help me doing this? Thanks in advance.
Sorry for my lack of skills.

PS. I consider, that some changes in files are causing this, but, as I mentioned before, I use GIT for a first time.
Comment 57 Thomas Renninger 2009-01-21 04:48:24 UTC
Created attachment 19921 [details]
Instead of reverting the offending patch, you may want to add this one on top and boot with bootparam: disable_mtrr_save

This also goes around the offending code.
Do not forget to add the mtrr debug param enhancement patch and also add mtrr.show, so that we get some additional info into the dmesg log.
Hope this one patches for latest git kernel, but it should.
Comment 58 Ondrej Kozina 2009-01-21 07:25:03 UTC
Created attachment 19927 [details]
dmesg

Dmesg from M51ta, patches mentioned have been applied

/proc/mtrr:
reg00: base=0x000000000 (    0MB), size= 2048MB, count=1: write-back
reg01: base=0x080000000 ( 2048MB), size=  512MB, count=1: write-back
reg02: base=0x0a0000000 ( 2560MB), size=  256MB, count=1: write-back
Comment 59 Vadim Plessky 2009-01-21 09:18:21 UTC
Hello Thomas,

I can test with my laptop (ASUS M51Ta) and get more MTRR debug info if you build required kernel for OpenSuSE 11.1

Does it make sense to test those options onIntel-based system, or MTRR is AMD-specific feature?
Same question - about older AMD systems (Turion 64 X2 - TL, TK processors - "Trinidad", "Tyler")
http://en.wikipedia.org/wiki/List_of_AMD_Turion_microprocessors

Comment 60 Vadim Plessky 2009-01-21 09:23:22 UTC
Regarding MTRR:

Memory Type Range Registers
http://en.wikipedia.org/wiki/Mtrr

Memory Type Range Registers (MTRRs) are a set of Processor Supplementary Capabilities control registers that provide system software with control of how accesses to memory ranges by the CPU are cached. It uses a set of programmable model-specific registers (MSRs) which are special registers provided by most modern CPUs.

Possible access modes to memory ranges can be:
    * uncached
    * write-through
    * write-combining
    * write-protect
    * write-back
. . .

Successor

Newer (primarily 64-bit) x86 CPU's support a more advanced technique called Page Attribute Tables that allow for per-table setting of these modes, instead of having a limited number of low-granularity registers to deal with modern memory sizes that can be as high as 8GB even on a laptop, and several times that amount on a desktop system.

Details on how MTRRs work in detail are described in the processor manuals from CPU vendors.

http://en.wikipedia.org/wiki/Page_Attribute_Table

The Page Attribute Table (also known as Page Allocation Table) is a Processor Supplementary Capability extension to the page table format of certain x86 and x86-64 microprocessors. Like Memory Type Range Registers (MTRRs), they allow for fine-grained control over how areas of memory are cached.

Unlike MTRRs, which provide the ability to manipulate the behavior of caching for a limited number of fixed physical address ranges, Page Attribute Tables allow for such behavior to be specified on a per-page basis, greatly increasing the ability of the operating system to select the most efficient behavior for any given task.

Comment 61 Thomas Renninger 2009-01-21 10:15:20 UTC
I am also not familiar with mtrr.
But as the code got introduced from one of our guys who unfortunately does not
work for SUSE anymore, I am looking deeper at this (also because I want to know more about the topic anyway and best learning is reading code and debugging).
I started reading a bit and looking at the code a bit.
I am rather busy right now, give me some days and I go through the output and
try to find out something.
Comment 62 Paul 2009-02-20 18:03:19 UTC
*** Bug 11714 has been marked as a duplicate of this bug. ***
Comment 63 Paul 2009-02-20 18:08:46 UTC
I have also been experiencing a kernel panic that can be suppressed either by using the acpi=ht boot parameter or by compiling without the MTRR code (CONFIG_MTRR=n) and have just closed bug #11714 as a duplicate of this one. 

Please let me know if there is any information I can provide that will help fix this.

Comment 64 Paul Wolfger 2009-03-02 07:45:02 UTC
BIOS 207 is now available for M51TA from http://www.asustreiber.de/downloads/file/1167-m51taas-207
I am running 2.6.29rc5 with MTRR=ON (!) and the notebook boots with acpi enabled! (without acpi=off, nolapic etc.) !
Nevertheless acpi does not seem to work properly: battery doesn't last for more than 1 hour. 

I don't know why this new bios is not available from the asus download page (yet).
Comment 65 Daniele Benucci 2009-03-02 10:48:09 UTC
(In reply to comment #64)
> BIOS 207 is now available for M51TA from
> http://www.asustreiber.de/downloads/file/1167-m51taas-207
> I am running 2.6.29rc5 with MTRR=ON (!) and the notebook boots with acpi
> enabled! (without acpi=off, nolapic etc.) !

I tried the above BIOS and works for me too without special boot parameters and with MTRR enabled, on kernel 2.6.27.

I experienced poor battery performance too, while using the laptop on battery in the past (with mtrr-disabled kernels). I suspect this may be due to some issue in handling the power state of the second video card, and in powernow-k8 not supporting (by now) voltage scaling but only frequency scaling.

Comment 66 Paul 2009-03-02 15:05:56 UTC
I tried with the latest version of the BIOS available for my motherboard (ASUS M3A-H/HDMI, version 1301) but unfortunately, I still get kernel panic unless I use acpi=ht or a kernel compiled without MTRR code.
Comment 67 Thomas Renninger 2009-03-03 02:48:43 UTC
> and in powernow-k8 not supporting (by now) voltage scaling but only frequency
> scaling.
Either powernow-k8 can do both, frequency and voltage scaling, or it does not work at all. Why do you think frequency scaling is broken? Can you provide dmesg output when loading the powernow-k8 driver.
Are you sure the battery lifetime regression comes from then new BIOS or could it be that it is related that you run a newer kernel now?

> some issue in handling the power state of the second video card
Hmm, mtrr and video card are more related, how this can influence power savings, I have no idea. Is there a changeset about the BIOS modifications? Is this a ATI card? Anyway running the latest binary graphics driver may improve things, Nvidia or ATI.
Comment 68 Daniele Benucci 2009-03-03 03:15:43 UTC
(In reply to comment #67)
> > and in powernow-k8 not supporting (by now) voltage scaling but only frequency
> > scaling.
> Either powernow-k8 can do both, frequency and voltage scaling, or it does not
> work at all. Why do you think frequency scaling is broken? Can you provide
> dmesg output when loading the powernow-k8 driver.

powernow-k8 works, but I think it doesn't support all of the hardware scaling features: e.g. minimum frequency in Linux is 600MHz while in Windows it is 550MHz (maybe northbridge scaling? maybe something related to voltage? I don't know, I'm no expert, just making some hypotheses)

Here is dmesg output for powernow-k8 module insertion
[   19.919509] powernow-k8: Found 1 AMD Turion(tm) X2 Ultra Dual-Core Mobile ZM-82 processors (2 cpu cores) (version 2.20.00)
[   19.919622] powernow-k8:    0 : pstate 0 (2200 MHz)
[   19.919700] powernow-k8:    1 : pstate 1 (1100 MHz)
[   19.919737] powernow-k8:    2 : pstate 2 (600 MHz)

> Are you sure the battery lifetime regression comes from then new BIOS or could
> it be that it is related that you run a newer kernel now?

There is no regression in battery lifetime: in Linux it always had been of about 1hr (with or without MTRRs). I think this is not related to BIOS or kernel version, but on how some hardware is managed (again, scaling working but at higher frequencies than in Windows and maybe second video card not deactivating while on battery)

> > some issue in handling the power state of the second video card
> Hmm, mtrr and video card are more related, how this can influence power
> savings, I have no idea.

This laptop has two video cards: an integrated Ati HD3200, intended to be used when on battery and a discrete HD3650 (HD3450 for M51Tr), intended to be used on AC. With Linux, at least by now, the integrated card is always used, but I don't know if the HD3650 chip is properly turned off or it drains power even if not used. This may be a reason for poor battery life issue.

> Is there a changeset about the BIOS modifications?

According to http://www.asustreiber.de/downloads/file/1167-m51taas-207 the changelog for bios 207 is:
* Fix the fan don't normal work after s3 resume in the power saving mode.
* Update external VGA VBIOS to BR030816.001 to fix 3D mark will hang with Hynix VRAM.

> Anyway running the latest binary graphics driver may improve things

I have not tested yet after the bios upgrade, but unfortunately recent fglrx releases either crash my Xorg or have other issues preventing me to use them (now I'm using the quite old fglrx 8.7 or radeon open-source driver depending on needing 3d acceleration or kernel-with-wireless-working). I'll try them again ASAP, as the bios changelog seems to update video bios too.
Comment 69 herrmann.der.user 2009-03-03 03:25:29 UTC
I suggest to change the Linux code to ignore RdMem/WrMem of fixed MTRR
registers and not to sync them between CPUs.

I've found this old thread

 http://lkml.org/lkml/2007/4/3/110

as a rationale of introducing the code which is causing the
problems described here. From this thread it seems that the
problematic system had the SYSCFG[MtrrFixDramModEn] bit set on
CPU0 but not on CPU1.
Thus the RdMem/WrMem bits were only reported on CPU0.

My assumption is that if SYSCFG[MtrrFixDramModEn] is cleared the
fixed MTRR contents will not differ on the CPUs. Linux won't try
to change the settings on CPU1 and the system boots normally --
hopefully ;-)
Comment 70 herrmann.der.user 2009-03-03 03:29:27 UTC
Created attachment 20412 [details]
[PATCH] x86: mtrr: don't modify RdDram/WrDram bits of fixed MTRRs

Patch is against Linus' git tree as of today (v2.6.29-rc6-305-g2450cf5).

Paul, can you verify whether this allows to boot your system even with CONFIG_MTRR=y.

Thomas, can you verify whether this doesn't break suspend/resume on the Ferrari
model(s) that Bernhard Kaindl mentioned in the old LKML thread.

Thanks!
Comment 71 herrmann.der.user 2009-03-03 03:49:38 UTC
WRT comment #68:

> powernow-k8 works, but I think it doesn't support all of the hardware scaling
>features: e.g. minimum frequency in Linux is 600MHz while in Windows it is
>550MHz
>Here is dmesg output for powernow-k8 module insertion
>[   19.919622] powernow-k8:    0 : pstate 0 (2200 MHz)
>[   19.919700] powernow-k8:    1 : pstate 1 (1100 MHz)
>[   19.919737] powernow-k8:    2 : pstate 2 (600 MHz)

Oops, this is most probably a bug in the powernow-k8 driver.

Here is what I get on a Turion Ultra using x86info

Pstate-0: fid=e, did=0, vid=24 (2200MHz) (current)
Pstate-1: fid=e, did=1, vid=30 (1100MHz)
Pstate-2: fid=e, did=2, vid=3c (550MHz)

On the same system powernow-k8 reports:
powernow-k8:    0 : pstate 0 (2200 MHz)
powernow-k8:    1 : pstate 1 (1100 MHz)
powernow-k8:    2 : pstate 2 (600 MHz)

I'll look at that.
Comment 72 Thomas Renninger 2009-03-03 04:12:08 UTC
> I have not tested yet after the bios upgrade, but unfortunately recent fglrx
> releases
The recent fglrx release should help a lot concerning battery life.
Comment 73 herrmann.der.user 2009-03-03 04:21:32 UTC
FYI, the 600MHz value for Pstate2 is from an ACPI table (containing
_PSS (Performance Supported States) objects). For each Pstate it contains
also the frequency, but the family 11h BKDG says about this value
"CoreFreq (MHz) = The CPU COF specified by MSRC001_00[6B:64][CpuFid]
rounded to the nearest 100 Mhz."

This is a rounded value and explains the observed difference. I think, the
powernow-k8 driver should determine the frequency from the Pstate MSR directly
and not from this ACPI table. (BTW, the tool x86info determines the frequencies
directly from the Pstate MSRs.)
Comment 74 Thomas Renninger 2009-03-03 04:47:57 UTC
> I think, the powernow-k8 driver should determine the frequency from the Pstate
> MSR directly and not from this ACPI table.
Hmm, I'd vote to keep taking the ACPI values. If the value is wrong you have a BIOS "bug". One of the basic ideas of ACPI is to stay HW independent. Intel and AMD HW of the last years are both using the same code which is good. You end up checking for several CPUIDs implementing different ways to obtain the values in some years.
On the other hand side the PowerNow! Windows driver seem to read the MSR to get the info (which is really bad!), so it's likely we see more broken BIOSes in this area. Hmm, we recently enhanced the powernow-k8 driver to take latency values from ACPI tables (exactly the same table) and Mark confirmed that the Windows driver is doing the same. I somehow cannot believe they don't trust the one value(s), but take the others. It would be great if you (maybe Mark knows details) could find out why Windows does not show the ACPI value. If it's reasonable we could make the change, but just do it because Windows shows other values sounds a bit hasty (maybe this is just a simple monitor tool not able to access ACPI tables not the Windows PowerNow! driver?).
Comment 75 Daniele Benucci 2009-03-03 05:29:23 UTC
(In reply to comment #74)
> > I think, the powernow-k8 driver should determine the frequency from the Pstate
> > MSR directly and not from this ACPI table.
> Hmm, I'd vote to keep taking the ACPI values. If the value is wrong you have a
> BIOS "bug". [...]
> On the other hand side the PowerNow! Windows driver seem to read the MSR to get
> the info (which is really bad!) [...]
> It would be great if you (maybe Mark knows
> details) could find out why Windows does not show the ACPI value. If it's
> reasonable we could make the change, but just do it because Windows shows other
> values sounds a bit hasty (maybe this is just a simple monitor tool not able to
> access ACPI tables not the Windows PowerNow! driver?).

The monitor tool is AMD Power Monitor, so I suppose it knows how to monitor the CPU... ;)
I agree that doing the change "because Windows shows other values" is nasty, but I think running a processor "out-of-spec" (or "constantly overclocked"), with subsequent thermal, power and noise problems is somewhat nastier...
Comment 76 herrmann.der.user 2009-03-03 06:11:31 UTC
Well, the HW is not overclocked or something like that under Linux.
The frequency/voltage settings for each Pstate are obtained from the
corresponding Pstate register when the Pstate is changed.

It is just that powernow-k8 reports wrong frequencies whenever a frequency
is rounded to 100 MHz, e.g. 550 MHz => ACPI reports 600 MHz and thus Linux
thinks CPU clock is 600 MHz instead of 550MHz),

Furthermore this involves that the corresponding frequencies in
/sys/devices/system/cpu/cpu0/cpufreq and the "cpu MHz" in /proc/cpuinfo are
incorrect.

Not sure what this means for time keeping if clocksource is TSC and
Pstate0 frequency were affected (say reporting 2100 Mhz instead of 2050 MHz).

In any case, I think we should fix this for sake of correct frequency reporting.
Comment 77 herrmann.der.user 2009-03-03 06:20:38 UTC
Created attachment 20413 [details]
x86: powernow-k8: determine exact CPU frequency for HW Pstates

(I know, this should be attached to and handled in a new bugzilla, but ...)

The frequency values reported by ACPI PSS objects are incorrect in some cases.
AMD Family 10h Processor BKDG says about CoreFreq (i.e. the frequency
as reported in the ACPI table)

"All CoreFreq values must be rounded to the nearest 100 MHz frequency
resulting in a maximum of 50 MHz frequency difference between the
reported CoreFreq and calculated CPU COF."

Patch is against Linus' git as of today (v2.6.29-rc6-305-g2450cf5).
Comment 78 Thomas Renninger 2009-03-03 06:48:36 UTC
> Furthermore this involves that the corresponding frequencies in
> /sys/devices/system/cpu/cpu0/cpufreq and the "cpu MHz" in /proc/cpuinfo are
> incorrect.
> In any case, I think we should fix this for sake of correct frequency
> reporting.
This is really ugly, but I tend to agree.
Comment 79 Paul 2009-03-03 14:18:47 UTC
(In reply to comment #70)
> Created an attachment (id=20412) [details]
> [PATCH] x86: mtrr: don't modify RdDram/WrDram bits of fixed MTRRs
> 
> Patch is against Linus' git tree as of today (v2.6.29-rc6-305-g2450cf5).
> 
> Paul, can you verify whether this allows to boot your system even with
> CONFIG_MTRR=y.

I can confirm that this patch allows me to boot with the MTRR code, without acpi=ht and without kernel panic. (I get a couple of messages about clearing bits flashing up at the beginning of the boot. It happened so fast I didn't catch the whole message.)

Please let me know if I should be trying any other patches.

Cheers, Paul
Comment 80 herrmann.der.user 2009-03-04 03:30:31 UTC
Paul, can you please provide the dmesg when booted with the patch.
I'd expect to see the message
"MTRR: CPU 0: SYSCFG[MtrrFixDramModEn] not cleared, clearing this bit"
at least once. But I like know how often this message shows up on your system.
Thanks.
Comment 81 Paul 2009-03-04 04:12:05 UTC
Created attachment 20425 [details]
dmesg output for 2.6.29 kernel with patch 20412

This dmesg output contains the following 3 lines:

[    0.000000] MTRR: CPU 0: SYSCFG[MtrrFixDramModEn] not cleared, clearing this bit
[    0.010000] MTRR: CPU 1: SYSCFG[MtrrFixDramModEn] not cleared, clearing this bit
[    0.010000] MTRR: CPU 2: SYSCFG[MtrrFixDramModEn] not cleared, clearing this bit

Paul
Comment 82 herrmann.der.user 2009-03-04 04:28:00 UTC
So your BIOS did not clear the bit on any CPU.
Furthermore I've found

[    0.460294] mtrr: your CPUs had inconsistent fixed MTRR settings
[    0.460294] mtrr: probably your BIOS does not setup all CPUs.
[    0.460294] mtrr: corrected configuration.

which means that memory (i.e. caching) type of some fixed memory ranges
still differs between CPUs and Linux synced the settings. But this time
without touching the RdMem/WrMem bits. I am curious how the fixed
MTRRs look like and will send a patch to collect this debug information.
Comment 83 herrmann.der.user 2009-03-04 07:05:13 UTC
Created attachment 20427 [details]
debug patch to print fixed mtrr settings

Paul, please apply this patch on top of the other one (attachement #20412) and
provide dmesg output after boot. Thanks!
Comment 84 Paul 2009-03-04 10:55:33 UTC
Created attachment 20429 [details]
dmesg output for 2.6.29 kernel with patch 20427
Comment 85 herrmann.der.user 2009-03-05 02:27:49 UTC
Thanks for that debug data.

This shows that, the mainline kernel w/o my patch (attachment #20412 [details])
is (potentially(*)) changing RdMem/WrMem bits on CPUs 1 and 2 from:

[    0.010000] MTRRfixed(268): 0x1818181818181818
[    0.010000] MTRRfixed(269): 0x1818181818181818
...
[    0.010000] MTRRfixed(26e): 0x1818181818181818
[    0.010000] MTRRfixed(26f): 0x1818181818181818

(i.e. reads and writes to the specified ranges are going to DRAM)
to (see first output for CPU 0):

[    0.000000] MTRRfixed(268): 0x1010101010101010
[    0.000000] MTRRfixed(269): 0x1010101010101010
...
[    0.000000] MTRRfixed(26e): 0x1515151515151515
[    0.000000] MTRRfixed(26f): 0x1515151515151515

This in turn means that reads got to DRAM but writes go to IO.
We just do not know what the BIOS has performed on CPU0 with
those RdMem/WrMem settings, maybe it is changing that later on.
But as we don't know it we shouldn't touch those bits.

(*) "potentially" because my debug patch did not show RdMem/WrMem bits
when fixed MTRR were set on CPU2 and CPU3.

Furthermore the mainline kernel w/ and w/o my patch
did change the memory type for following ranches on
CPUs 2 and 3:

[    0.010000] MTRRfixed(26e): 0x1818181818181818
[    0.010000] MTRRfixed(26f): 0x1818181818181818

which was type 0 (uncached) (when masking the RdMem/WrMem bits)
to

[    0.130000] MTRRfixed(26e): 0x0505050505050505
[    0.130000] MTRRfixed(26f): 0x0505050505050505

i.e. type 5 (write-protect).

If there are no objections I'll submit
"[PATCH] x86: mtrr: don't modify RdDram/WrDram bits of fixed MTRRs"
for upstream integration.
Comment 86 Paul 2009-03-05 13:50:10 UTC
It prevents my system from going straight into kernel panic without having to disable acpi or compile a custom kernel without MTRR - so I certainly have no objections. (However, I'm not qualified to comment on what effect this patch might have for other people, so you should probably make sure you're satisfied that no one else has any objections before proceeding.)
Comment 87 Thomas Renninger 2009-03-11 08:03:30 UTC
I can confirm that with Andreas' patch from comment #70, the Ferrari 1000 can still be suspend/resumed successfully. This was what the offending patch did fix -> thumbs up...
Comment 88 herrmann.der.user 2009-03-11 08:14:04 UTC
Ok, nice to hear.
I've just submitted the patch to x86 maintainers for upstream integration.
Thanks Thomas (and all others) for testing!
Comment 89 herrmann.der.user 2009-03-13 04:20:46 UTC
*** Bug 12352 has been marked as a duplicate of this bug. ***
Comment 90 herrmann.der.user 2009-03-13 04:26:30 UTC
Patch (equivalent to attachment #20412 [details]) to fix this issue is on its
way into mainline kernel.
(see http://marc.info/?l=linux-kernel&m=123693623703978)

I expect that the fix will be integrated into 2.6.29.1.
Comment 91 Jakub Liput 2009-06-05 19:11:45 UTC
Oh, I forgot to thank all of You, who help, very, very much! 

PS. I know, refreshing old thread is not compatibile with netiquette, but I'm very glad to see working kernel on my notebook ;)
Comment 92 Paul 2009-06-07 15:27:54 UTC
Just upgraded to Ubuntu Jaunty and got the latest kernel. It's working for me! Thank you.

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