Bug 5148

Summary:	no C2 state detected
Product:	ACPI	Reporter:	Daniel Nofftz (daniel)
Component:	Power-Processor	Assignee:	Venkatesh Pallipadi (venki)
Status:	REJECTED UNREPRODUCIBLE
Severity:	normal	CC:	acpi-bugzilla, bunk
Priority:	P2
Hardware:	i386
OS:	Linux
Kernel Version:	2.6.13	Subsystem:
Regression:	---	Bisected commit-id:
Attachments:	output from dmesg -s40000 output from dmidecode output from acpidump output from lspci -vv output from cat /proc/interrupts

Description Daniel Nofftz 2005-08-29 07:41:57 UTC

Most recent kernel where this bug did not occur: don't know
Distribution: Debian/unstable
Hardware Environment: Epox 8rda3+ (Nforce 2) Motherboard + Athlon XP 3200+
(Barton) + linux on a sata-hd connected to a sil 3112a port
Software Environment: Linux/2.6.13/Debian
Problem Description: The C2 idle state capability isn't detected anymore. It
defenetly worked with some older kernel but i can't say with which it stoped to
work, cause i didn't controlled it for some time. but it defenetly don't work
with 2.6.12.5, 2.6.13-rc6, 2.6.13-rc6-mm1 or 2.6.13.

Comment 1 Daniel Nofftz 2005-08-29 07:46:52 UTC

Created attachment 5798 [details]
output from dmesg -s40000

output from dmesg -s40000

Comment 2 Daniel Nofftz 2005-08-29 07:52:09 UTC

Created attachment 5799 [details]
output from dmidecode

Comment 3 Daniel Nofftz 2005-08-29 07:53:27 UTC

Created attachment 5800 [details]
output from acpidump

Comment 4 Daniel Nofftz 2005-08-29 07:54:51 UTC

Created attachment 5801 [details]
output from lspci -vv

Comment 5 Daniel Nofftz 2005-08-29 07:55:57 UTC

Created attachment 5802 [details]
output from cat /proc/interrupts

Comment 6 Venkatesh Pallipadi 2005-08-30 10:45:56 UTC

Does patch in bug #4485 help?

Comment 7 Daniel Nofftz 2005-08-30 11:49:55 UTC

i tried #4485 patch in post #9

it doesn't help ... sorry ...

Comment 8 Venkatesh Pallipadi 2005-08-31 17:49:58 UTC

It will help if you can give the kernel version where C2 states did work. Also 
the acpidump/disassembly from this system will help too.

Thanks.

Comment 9 Len Brown 2005-08-31 19:51:21 UTC

any difference if the processor module is loaded with nocst?
eg
modprobe processor nocst=1

Comment 10 Daniel Nofftz 2005-09-01 02:48:58 UTC

hmm ... ok 
the c2 state definetly worked some time. i am the author of the athlon
powersaving howto and i know that it worked ...
BUT: all kernels i checked this morning DIDN't detect the C2 state and i checked
every kernel i used back to 2.6.2 or so ... 

so it looks like there is another cause ... maybe a bios update ... or some
sunspots ... the problem is i can't flash back to an old bios to check, cause i
need the newest to use my sata drive ... 

any suggestions where i could look ?

Comment 11 Venkatesh Pallipadi 2006-03-25 06:25:51 UTC

I don't see either FADT or CST in acpi dump that you have attached. So, there is
no way for OS to find out about the C-state capability of this system. Probably
BIOS update is the issue. You will have to check with the BIOS provider.

Comment 12 Daniel Nofftz 2006-03-25 07:28:51 UTC

yes ... i also think its a bios issue ...
i puzzled a little bit with it last year, but came to no definite solution.
chistmas brought me a new amd64 system and so from my perspective we can close
this bug cause i don't have the athlon XP computer anymore.