Bug 11785
| Summary: | boot hang - unless "nolapic" - Asus M3N, Asus M300N | ||
|---|---|---|---|
| Product: | ACPI | Reporter: | Tony White (tonywhite100) |
| Component: | Config-Other | Assignee: | acpi_acpica-core (acpi_acpica-core) |
| Status: | CLOSED DUPLICATE | ||
| Severity: | high | CC: | acpi-bugzilla |
| Priority: | P1 | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Kernel Version: | 2.6.23.1, 2.6.25.5, 2.6.27.1 | Subsystem: | |
| Regression: | --- | Bisected commit-id: | |
| Attachments: |
Output from acpidump in a text file
cpuinfo dmidecode output acpi=debug dmesg info log warnings log Newest bios version dmidecode output |
||
Will you please attach the output of acpidump? Will you please capture the screenshot when the system hangs without the "nolapic" boot option? Thanks. Created attachment 18388 [details]
Output from acpidump in a text file
As requested, Here's the output from acpidump in a text file.
Unforunately, I can't screenshot anything useful. From grub I get a black screen with no text and the system hangs. The system stays that way until the power button is held down to turn the system off. I have attached the output of acpidump as requested. If you can provide me with some sort of guide to the information you need, I can build a debug kernel and boot it if that would provide data that would enable you to fix this. Please advise. Thank you for responding to my bug report, Tony. I should also mention I have now compiled 2.6.27.2 and this problem is the same. Can you please try some old kernels, like 2.6.26/2.6.24...? We have a similar issue in Asus laptop several years ago, and the issue should already be fixed I've been experiencing this problem for over a year on the same machine without actually knowing how to report it to you guys. I have had the same problem with kernel-2.6.25.5 in OpenSuSe 11 and also kernel-2.6.23.1 in Fedora 8. It's not something I have been checking for because once you set nolapic in grub, The option gets carried over when a new kernel is installed. The system experiences this bug everytime I boot without nolapic without fail, With every kernel that I have booted on it and using every distribution I have tried (A few.) Would you like anymore info? I'd really like to help sort this, If possible, Please. please paste the output from $ cat /proc/cpuinfo (i expect it will show the apic bit set) This is a uni-processor box that has no IOAPIC. I'm curious why you're running a CONFIG_SMP kernel on it. It is possible that during its day, only uni-processor kernels would be installed on such a box (though today, some distros run SMP on everything) It used to be that Linux enabled the lapic by default, even if the BIOS disabled it. We fixed a lot of systems when we simply did what the BIOS told us to do and ignored a disabled LAPIC. Maybe this system has a BIOS that should disable the lapic, but doesn't? Please attach the output from dmidecode. detect_init_APIC() should be smart enough, and I see no evidence of "Local APIC disabled by BIOS -- reenabling." in your dmesg... btw. have you tried "nolapictimer"? This would use the lapic, but w/o its timer capability. apic=debug may also give us a clue Thanks Len, I will do as you have requested but I have uncovered something pretty horrible in all this mess, Which is pretty frustrating because I want Linux running on this machine. I went to the asus website and found that there were bios updates to be had. Great I thought, Lets try that. Flashed the bios with the most recent rom, Great. Booted my copy of Mandriva 2009. Massive slow down. It was about 5 minutes to get to x. vanilla 2.6.27.3 and everything was slow. Particularly udev. Re-installed tried again, Same thing slow, Right from boot. Both with and without nolapic resulted in a huge lag during anything. Tried other distributions, Tried with and without nolapic. Still the same. I tried loading the bios' default settings also, Still the same. Basically, The current version bios for this machine and it's previous revision all cause the kernel to run very low. I tried the version before current and it performed in the same way. The original bios version is not slow and just needs nolapic or will not boot. I was prudent enough to dump the bios before hand and have now restored the original rom to the bios, Which works perfectly as before but needing nolapic. So you guys need to know that this machine, m3n with it's latest bios version installed is not working properly at all. It will boot without nolapic but it will run real slow. I don't know what to do with it, If it wasn't such a useful tool, It would have gone out of the window. Len you are right that this machine has one processor with one core. If local apic is to do with smp then is it therefore correct that local apic is not required? If so, Yes, The version of the bios that runs with nolapic would seem to need it switching off or not turned on by the kernel to avoid a crash. As far as the CONFIG_SMP goes, It's a make oldconfig on the kernel that ships with Mandriva 2009, So I guess they turn lots of stuff on and I don't have a great idea what to turn on, So went for what was working already. I'll add attachments and stick with the old version of the bios that needs nolapic for now. Do you think that this is something I should talk to asus about? It's an old(ish) Laptop so I doubt that they will be that interested because windows runs fine with all the bios revisions. Could this possibly be anything to do with a certain mr gates and a rubbish secret acpi implementation that is deliberately designed to obstruct Linux, I wonder? What would need to be done to attempt to fix the latest bios revision slowdown? Created attachment 18521 [details]
cpuinfo
cat /proc/cpuinfo
Created attachment 18522 [details]
dmidecode output
nolapic timer resulted in same problem. No boot. acpi=debug returned nothing, Screen still blank. Should I create another bug report about the updated bios? noapic lets the system boot but then freezes. The last line it freezes is : Initializing Device/Processor/Thermal objects by executing _INI methods... Will you please add the boot option of "apic=debug nolapic" and attach the output of dmesg? Thanks. OK, Quick(ish) update : I have been able to build a kernel that will boot and run smoothly with both bios versions, The only thing I have yet to resolve is an alsa issue which is not relevant to this bug at all and I may be able to solve with an alsa recompile. I have been testing with linux-2.6.27.4 and have had many failures with this machine but right now I am in a workable environment using a build that seems good. Firstly, The first bios version, Which is the original bios version that came preloaded onto the machine, Which this bug is all about. That bios version will only boot and not hang if I do not enable : Local APIC Support on Uniprocessors in a build. However, I do not think that this setting is required at all, The kernel runs very smoothly without it set and does not fail to boot. I know the kernel should not fail to boot with this setting turned on but I would like to know if it is needed at all, I thought lapic was smp related? It seems a strange default option to me but I know little more that it does not work on this m3n. Now, Having created a working build, I then attempted to solve the problem with the massive speed slowdown with the latest bios revision installed. With Local APIC Support on Uniprocessors support built into the build, The system boots and runs very slowly using this bios revision, So disabled. When I turn on highmem support (4gb) The system hangs at udev a bit and then freezes at udev events. That's maybe not acpi but we don't know yet. I should not need to use highmem, The system has 1gb but the kernel spews out a message to turn it on in the dmseg. It's not going on in it's current incarnation. It does'nt play well here. So to sum up so far, I have a working build without Local APIC Support on Uniprocessors and Highmem Support built into the kernel. Please note that I have been using pure vanilla and not patch kludging anything. To follow this bug up with some more useful and meaningful data, I will build two kernels with full debug support, Boot with all the debug turned on and attach the dmesg.log(s) here. One that works and another one with both highmem (4gb) + Local APIC Support on Uniprocessors built in. I will test both bios versions, So 4 dmesg.log attachments. Maybe then it might be clear what's happening here. OK. Here's, Hopefully, Some meaningfull output. This data is against 2.6.27.4 now. I still have the same problem. The logs posted here are against the original bios that shipped with the machine not the updated bios version. The latest bios version provides even more complications and I will add a new report for that against 2.6.27.4 because I believe it to be different slightly to this issue. I hope that this information prooves useful in some way. Please see attached. Created attachment 18669 [details]
acpi=debug dmesg
acpi=debug dmesg
Created attachment 18670 [details]
info log
info log
Created attachment 18671 [details]
warnings log
warnings log
These messages from comment #18 suggest your slow-down may be related to MTRR bogosity: Nov 3 21:40:22 localhost kernel: WARNING: BIOS bug: CPU MTRRs don't cover all of memory, losing 7MB of RAM. Nov 3 21:40:22 localhost kernel: ------------[ cut here ]------------ Nov 3 21:40:22 localhost kernel: WARNING: at arch/x86/kernel/cpu/mtrr/main.c:1558 mtrr_trim_uncached_memory+0x366/0x381() Nov 3 21:40:22 localhost kernel: Modules linked in: Nov 3 21:40:22 localhost kernel: Pid: 0, comm: swapper Not tainted 2.6.27-desktop586-0.rc8.2mnb #1 Nov 3 21:40:22 localhost kernel: [<c0382b32>] ? printk+0x18/0x1e Nov 3 21:40:22 localhost kernel: [<c0131084>] warn_on_slowpath+0x54/0x80 Nov 3 21:40:22 localhost kernel: [<c0385323>] ? _spin_unlock_irqrestore+0x23/0x40 Nov 3 21:40:22 localhost kernel: [<c0131919>] ? release_console_sem+0x1b9/0x1d0 Nov 3 21:40:22 localhost kernel: [<c0131cf8>] ? vprintk+0x188/0x3f0 Nov 3 21:40:22 localhost kernel: [<c04c36f0>] ? e820_update_range_map+0x1bb/0x236 Nov 3 21:40:22 localhost kernel: [<c04c6daf>] mtrr_trim_uncached_memory+0x366/0x381 Nov 3 21:40:22 localhost kernel: [<c04c1746>] setup_arch+0x50c/0xaf6 Nov 3 21:40:22 localhost kernel: [<c0131919>] ? release_console_sem+0x1b9/0x1d0 Nov 3 21:40:22 localhost kernel: [<c014aa5a>] ? down_trylock+0x2a/0x40 Nov 3 21:40:22 localhost kernel: [<c0131cf8>] ? vprintk+0x188/0x3f0 Nov 3 21:40:22 localhost kernel: [<c04c405f>] ? __reserve_early+0x98/0x149 Nov 3 21:40:22 localhost kernel: [<c04ba4d8>] start_kernel+0x63/0x354 Nov 3 21:40:22 localhost kernel: [<c04ba10a>] ? reserve_ebda_region+0x69/0x7f Nov 3 21:40:22 localhost kernel: [<c04ba099>] __init_begin+0x99/0xa1 re: nolapic needed at this point, it seems that adding a DMI entry to diable the lapic on this box is the way to go. We'll need the dmidecode from the 2nd BIOS as well as the one above. "WARNING: BIOS bug: CPU MTRRs don't cover all of memory, losing 7MB of RAM." Doesn't appear anymore with the bios update, So Asus' problem and not the kernel but for anyone with this old bios version, It might be nice if it did, Just work. I'm a little more concerned about the new bugs found with the new bios though, As I have stopped using this old bios version because it is outdated by several years but it is the bios that the machine was shipped with. dmidecode from the newer bios attached, As requested. Created attachment 18874 [details]
Newest bios version dmidecode output
I believe this bug goes back to up this one.... and is cauched by memory caching problem. http://bugzilla.kernel.org/show_bug.cgi?id=6139 Thanks Mark, Yes! That is exactly it. Exactly the same problem, Lagging at boot and needing highmem turned off in the kernel configuration. So the memory caching problem is in the acpi bios and it's not the kernel's fault? I will try specifying mem= to the kernel to see if that makes a difference. hi, tony, any update? I can't test this old bios version any more, It's the old one but I assume it's the same memory problem. Please see : http://bugzilla.kernel.org/show_bug.cgi?id=11953 *** This bug has been marked as a duplicate of bug 11953 *** Tony, to answer your question... No, the Local APIC isn't extremely useful on a uni-processor. It does provide an additional timer, and that timer is efficient, but that timer tends to stop when the system is idle, making its use somewhat problematic on the old uniprocessor laptops. As you tested that the "nolapic_timer" wasn't able to replace "nolapic", the issue with the original BIOS was not related to that. One other thing that (would have) been useful to try on that old BIOS also would be nmi_watchdog=0 -- just in case your config had enabled it. But I see from bug 11953 that you are now building and booting with LAPIC support on the latest BIOS, so this bug can be closed. |
Latest working kernel version:linux-2.6.27.1 Earliest failing kernel version:All previous as far as I can remember. Distribution: Mandrvia 2009 Hardware Environment:Asus M300N (Also known as M3N) It's a laptop. The Asus sticker says M300N. Software Environment:glibc 2.8 Problem Description: I need to pass no lapic to the kernel in order to prevent a hang at boot. The kernel will not boot without this option supplied to it. Steps to reproduce:Boot a vanilla linux-2.6.27.1 using grub on this machine without passing nolapic to it. Other than that, The kernel runs very well guys, Nice job! Keep up the sterling work, You guys rock! I hope I have reported this in the right place. :) lspci : 00:00.0 Host bridge: Intel Corporation 82852/82855 GM/GME/PM/GMV Processor to I/O Controller (rev 02) 00:00.1 System peripheral: Intel Corporation 82852/82855 GM/GME/PM/GMV Processor to I/O Controller (rev 02) 00:00.3 System peripheral: Intel Corporation 82852/82855 GM/GME/PM/GMV Processor to I/O Controller (rev 02) 00:02.0 VGA compatible controller: Intel Corporation 82852/855GM Integrated Graphics Device (rev 02) 00:02.1 Display controller: Intel Corporation 82852/855GM Integrated Graphics Device (rev 02) 00:1d.0 USB Controller: Intel Corporation 82801DB/DBL/DBM (ICH4/ICH4-L/ICH4-M) USB UHCI Controller #1 (rev 03) 00:1d.1 USB Controller: Intel Corporation 82801DB/DBL/DBM (ICH4/ICH4-L/ICH4-M) USB UHCI Controller #2 (rev 03) 00:1d.2 USB Controller: Intel Corporation 82801DB/DBL/DBM (ICH4/ICH4-L/ICH4-M) USB UHCI Controller #3 (rev 03) 00:1d.7 USB Controller: Intel Corporation 82801DB/DBM (ICH4/ICH4-M) USB2 EHCI Controller (rev 03) 00:1e.0 PCI bridge: Intel Corporation 82801 Mobile PCI Bridge (rev 83) 00:1f.0 ISA bridge: Intel Corporation 82801DBM (ICH4-M) LPC Interface Bridge (rev 03) 00:1f.1 IDE interface: Intel Corporation 82801DBM (ICH4-M) IDE Controller (rev 03) 00:1f.5 Multimedia audio controller: Intel Corporation 82801DB/DBL/DBM (ICH4/ICH4-L/ICH4-M) AC'97 Audio Controller (rev 03) 00:1f.6 Modem: Intel Corporation 82801DB/DBL/DBM (ICH4/ICH4-L/ICH4-M) AC'97 Modem Controller (rev 03) 01:04.0 Network controller: Intel Corporation PRO/Wireless LAN 2100 3B Mini PCIAdapter (rev 04) 01:05.0 CardBus bridge: Ricoh Co Ltd RL5c475 (rev b8) 01:05.1 FireWire (IEEE 1394): Ricoh Co Ltd R5C551 IEEE 1394 Controller 01:08.0 Ethernet controller: Intel Corporation 82801DB PRO/100 VM (MOB) Ethernet Controller (rev 83) dmidecode : # dmidecode 2.9 SMBIOS 2.3 present. 37 structures occupying 1383 bytes. Table at 0x000F5610. Handle 0x0000, DMI type 0, 20 bytes BIOS Information Vendor: American Megatrends Inc. Version: 0202 Release Date: 04/18/2003 Address: 0xF0000 Runtime Size: 64 kB ROM Size: 512 kB Characteristics: ISA is supported PCI is supported PC Card (PCMCIA) is supported PNP is supported APM is supported BIOS is upgradeable BIOS shadowing is allowed ESCD support is available Boot from CD is supported Selectable boot is supported BIOS ROM is socketed EDD is supported 5.25"/360 KB floppy services are supported (int 13h) 5.25"/1.2 MB floppy services are supported (int 13h) 3.5"/720 KB floppy services are supported (int 13h) 3.5"/2.88 MB floppy services are supported (int 13h) Print screen service is supported (int 5h) 8042 keyboard services are supported (int 9h) Serial services are supported (int 14h) Printer services are supported (int 17h) CGA/mono video services are supported (int 10h) ACPI is supported USB legacy is supported AGP is supported LS-120 boot is supported ATAPI Zip drive boot is supported BIOS boot specification is supported Function key-initiated network boot is supported Handle 0x0001, DMI type 1, 25 bytes System Information Manufacturer: ASUSTeK Computer Inc. Product Name: M3N Version: 1.0 Serial Number: SSN12345678901234567 UUID: 00020003-0004-0005-0006-000700080009 Wake-up Type: Power Switch Handle 0x0002, DMI type 2, 8 bytes Base Board Information Manufacturer: ASUSTeK Computer Inc. Product Name: M3N Version: 1.0 Serial Number: BSN12345678901234567 Handle 0x0003, DMI type 3, 17 bytes Chassis Information Manufacturer: ASUSTeK Computer Inc. Type: Notebook Lock: Not Present Version: 1.0 Serial Number: CSN12345678901234567 Asset Tag: ATN12345678901234567 Boot-up State: Safe Power Supply State: Safe Thermal State: Other Security Status: Other OEM Information: 0x00000000 Handle 0x0004, DMI type 4, 35 bytes Processor Information Socket Designation: X1 Type: Central Processor Family: Unknown Manufacturer: Intel ID: 95 06 00 00 BF FB E9 A7 Version: Mobile Genuine Intel(R) processor 1600MHz Voltage: 1.5 V External Clock: 100 MHz Max Speed: 1600 MHz Current Speed: 1600 MHz Status: Populated, Enabled Upgrade: Unknown L1 Cache Handle: 0x0005 L2 Cache Handle: 0x0006 L3 Cache Handle: Not Provided Serial Number: PSN12345678901234567 Asset Tag: PATN1234567890123456 Part Number: PPN12345678901234567 Handle 0x0005, DMI type 7, 19 bytes Cache Information Socket Designation: L1-Cache Configuration: Enabled, Not Socketed, Level 1 Operational Mode: Varies With Memory Address Location: Internal Installed Size: 32 KB Maximum Size: 32 KB Supported SRAM Types: Pipeline Burst Installed SRAM Type: Pipeline Burst Speed: Unknown Error Correction Type: Single-bit ECC System Type: Data Associativity: 4-way Set-associative Handle 0x0006, DMI type 7, 19 bytes Cache Information Socket Designation: L2-cache Configuration: Enabled, Not Socketed, Level 2 Operational Mode: Varies With Memory Address Location: Internal Installed Size: 1024 KB Maximum Size: 1024 KB Supported SRAM Types: Pipeline Burst Installed SRAM Type: Pipeline Burst Speed: Unknown Error Correction Type: Single-bit ECC System Type: Unified Associativity: 4-way Set-associative Handle 0x0007, DMI type 5, 20 bytes Memory Controller Information Error Detecting Method: None Error Correcting Capabilities: None Supported Interleave: One-way Interleave Current Interleave: One-way Interleave Maximum Memory Module Size: 1024 MB Maximum Total Memory Size: 2048 MB Supported Speeds: 70 ns 60 ns 50 ns Supported Memory Types: DIMM SDRAM Memory Module Voltage: 3.3 V Associated Memory Slots: 2 0x0008 0x0009 Enabled Error Correcting Capabilities: None Handle 0x0008, DMI type 6, 12 bytes Memory Module Information Socket Designation: DIMM1 Bank Connections: 0 1 Current Speed: 10 ns Type: Standard DIMM SDRAM Installed Size: 512 MB (Single-bank Connection) Enabled Size: 512 MB (Single-bank Connection) Error Status: OK Handle 0x0009, DMI type 6, 12 bytes Memory Module Information Socket Designation: DIMM2 Bank Connections: 2 3 Current Speed: 10 ns Type: Standard DIMM SDRAM Installed Size: 512 MB (Single-bank Connection) Enabled Size: 512 MB (Single-bank Connection) Error Status: OK Handle 0x000A, DMI type 8, 9 bytes Port Connector Information Internal Reference Designator: J1A1 Internal Connector Type: None External Reference Designator: USB1 External Connector Type: Access Bus (USB) Port Type: USB Handle 0x000B, DMI type 8, 9 bytes Port Connector Information Internal Reference Designator: J1A1 Internal Connector Type: None External Reference Designator: USB2 External Connector Type: Access Bus (USB) Port Type: USB Handle 0x000C, DMI type 8, 9 bytes Port Connector Information Internal Reference Designator: J3A1 Internal Connector Type: None External Reference Designator: 1394 External Connector Type: IEEE 1394 Port Type: Firewire (IEEE P1394) Handle 0x000D, DMI type 8, 9 bytes Port Connector Information Internal Reference Designator: J4A1 Internal Connector Type: None External Reference Designator: MODEM External Connector Type: RJ-11 Port Type: Modem Port Handle 0x000E, DMI type 8, 9 bytes Port Connector Information Internal Reference Designator: J5A1 Internal Connector Type: None External Reference Designator: LAN External Connector Type: RJ-45 Port Type: Network Port Handle 0x000F, DMI type 8, 9 bytes Port Connector Information Internal Reference Designator: J6A1 Internal Connector Type: None External Reference Designator: Audio Mic In External Connector Type: Mini Jack (headphones) Port Type: Audio Port Handle 0x0010, DMI type 8, 9 bytes Port Connector Information Internal Reference Designator: J6A1 Internal Connector Type: None External Reference Designator: Audio Line In External Connector Type: Mini Jack (headphones) Port Type: Audio Port Handle 0x0011, DMI type 8, 9 bytes Port Connector Information Internal Reference Designator: J6A1 Internal Connector Type: None External Reference Designator: Audio Line Out External Connector Type: Mini Jack (headphones) Port Type: Audio Port Handle 0x0012, DMI type 8, 9 bytes Port Connector Information Internal Reference Designator: J9A1 Internal Connector Type: None External Reference Designator: Video External Connector Type: DB-15 female Port Type: Video Port Handle 0x0013, DMI type 8, 9 bytes Port Connector Information Internal Reference Designator: J10A1 Internal Connector Type: None External Reference Designator: Port Replicator External Connector Type: Proprietary Port Type: Other Handle 0x0014, DMI type 8, 9 bytes Port Connector Information Internal Reference Designator: J11A1 Internal Connector Type: None External Reference Designator: AIBOX External Connector Type: Proprietary Port Type: Other Handle 0x0015, DMI type 8, 9 bytes Port Connector Information Internal Reference Designator: J12A1 Internal Connector Type: None External Reference Designator: USB3 External Connector Type: Access Bus (USB) Port Type: USB Handle 0x0016, DMI type 9, 13 bytes System Slot Information Designation: MiniPCI Type: 32-bit PCI Current Usage: Available Length: Long ID: 1 Characteristics: 3.3 V is provided Opening is shared PME signal is supported Handle 0x0017, DMI type 10, 6 bytes On Board Device Information Type: Video Status: Enabled Description: AGP VGA controller Handle 0x0018, DMI type 10, 6 bytes On Board Device Information Type: Ethernet Status: Enabled Description: Ethernet controller Handle 0x0019, DMI type 10, 6 bytes On Board Device Information Type: Sound Status: Enabled Description: Audio controller Handle 0x001A, DMI type 10, 6 bytes On Board Device Information Type: Other Status: Enabled Description: Modem controller Handle 0x001B, DMI type 13, 22 bytes BIOS Language Information Installable Languages: 1 enUS Currently Installed Language: enUS Handle 0x001C, DMI type 15, 33 bytes System Event Log Area Length: 1008 bytes Header Start Offset: 0x1010 Header Length: 16 bytes Data Start Offset: 0x1020 Access Method: General-purpose non-volatile data functions Access Address: 0x0002 Status: Invalid, Not Full Change Token: 0x00000000 Header Format: Type 1 Supported Log Type Descriptors: 5 Descriptor 1: POST error Data Format 1: POST results bitmap Descriptor 2: Parity memory error Data Format 2: Multiple-event Descriptor 3: I/O channel block Data Format 3: Multiple-event Descriptor 4: Single-bit ECC memory error Data Format 4: Multiple-event Descriptor 5: Multi-bit ECC memory error Data Format 5: Multiple-event Handle 0x001D, DMI type 18, 23 bytes 32-bit Memory Error Information Type: Bad Read Granularity: Device Level Operation: Read Vendor Syndrome: Unknown Memory Array Address: Unknown Device Address: Unknown Resolution: Unknown Handle 0x001E, DMI type 16, 15 bytes Physical Memory Array Location: System Board Or Motherboard Use: System Memory Error Correction Type: None Maximum Capacity: 3 GB Error Information Handle: 0x001D Number Of Devices: 2 Handle 0x001F, DMI type 19, 15 bytes Memory Array Mapped Address Starting Address: 0x00000000000 Ending Address: 0x0FE000003FF Range Size: 1065353217 kB Physical Array Handle: 0x001E Partition Width: 0 Handle 0x0020, DMI type 17, 27 bytes Memory Device Array Handle: 0x001E Error Information Handle: 0x001D Total Width: 72 bits Data Width: 64 bits Size: 512 MB Form Factor: DIMM Set: None Locator: DIMM1 Bank Locator: BANK0 Type: SDRAM Type Detail: Synchronous Speed: Unknown Manufacturer: Manufacturer1 Serial Number: SerNum1 Asset Tag: AssetTagNum1 Part Number: PartNum1 Handle 0x0021, DMI type 20, 19 bytes Memory Device Mapped Address Starting Address: 0x00000000000 Ending Address: 0x000200003FF Range Size: 524289 kB Physical Device Handle: 0x0020 Memory Array Mapped Address Handle: 0x001F Partition Row Position: 1 Interleaved Data Depth: 1 Handle 0x0022, DMI type 17, 27 bytes Memory Device Array Handle: 0x001E Error Information Handle: 0x001D Total Width: 72 bits Data Width: 64 bits Size: 512 MB Form Factor: DIMM Set: None Locator: DIMM2 Bank Locator: BANK1 Type: SDRAM Type Detail: Synchronous Speed: Unknown Manufacturer: Manufacturer2 Serial Number: SerNum2 Asset Tag: AssetTagNum2 Part Number: PartNum2 Handle 0x0023, DMI type 20, 19 bytes Memory Device Mapped Address Starting Address: 0x00020000000 Ending Address: 0x000400003FF Range Size: 524289 kB Physical Device Handle: 0x0022 Memory Array Mapped Address Handle: 0x001F Partition Row Position: 1 Interleaved Data Depth: 1 Handle 0x0024, DMI type 127, 4 bytes End Of Table Some stuff that was in the syslog : Oct 19 02:08:53 m3000n kernel: Linux version 2.6.27.1-pentium-m (tony@m3000n) (gcc version 4.3.2 (GCC) ) #1 SMP Fri Oct 17 03:54:18 BST 2008 Oct 19 02:08:53 m3000n kernel: PAT WC disabled due to known CPU erratum. Oct 19 02:08:53 m3000n kernel: BIOS-provided physical RAM map: Oct 19 02:08:53 m3000n kernel: BIOS-e820: 0000000000000000 - 000000000009fc00 (usable) Oct 19 02:08:53 m3000n kernel: BIOS-e820: 000000000009fc00 - 00000000000a0000 (reserved) Oct 19 02:08:53 m3000n kernel: BIOS-e820: 00000000000e0000 - 0000000000100000 (reserved) Oct 19 02:08:53 m3000n kernel: BIOS-e820: 0000000000100000 - 000000003f740000 (usable) Oct 19 02:08:53 m3000n kernel: BIOS-e820: 000000003f740000 - 000000003f750000 (ACPI data) Oct 19 02:08:53 m3000n kernel: BIOS-e820: 000000003f750000 - 000000003f800000 (ACPI NVS) Oct 19 02:08:53 m3000n kernel: last_pfn = 0x3f740 max_arch_pfn = 0x100000 Oct 19 02:08:53 m3000n kernel: WARNING: BIOS bug: CPU MTRRs don't cover all of memory, losing 7MB of RAM. Oct 19 02:08:53 m3000n kernel: ------------[ cut here ]------------ Oct 19 02:08:53 m3000n kernel: WARNING: at /opt/build/linux-2.6.27.1/arch/x86/kernel/cpu/mtrr/main.c:1558 mtrr_trim_uncached_memory+0x36e/0x389() Oct 19 02:08:53 m3000n kernel: Modules linked in: Oct 19 02:08:53 m3000n kernel: Pid: 0, comm: swapper Not tainted 2.6.27.1-pentium-m #1 Oct 19 02:08:53 m3000n kernel: [<c0366dc6>] ? printk+0x18/0x1a Oct 19 02:08:53 m3000n kernel: [<c01300e4>] warn_on_slowpath+0x54/0x80 Oct 19 02:08:53 m3000n kernel: [<c0369553>] ? _spin_unlock_irqrestore+0x23/0x40 Oct 19 02:08:53 m3000n kernel: [<c0130979>] ? release_console_sem+0x1b9/0x1d0 Oct 19 02:08:53 m3000n kernel: [<c0130d40>] ? vprintk+0x170/0x370 Oct 19 02:08:53 m3000n kernel: [<c049d60a>] ? e820_update_range_map+0x1bb/0x236 Oct 19 02:08:53 m3000n kernel: [<c04a0c65>] mtrr_trim_uncached_memory+0x36e/0x389 Oct 19 02:08:53 m3000n kernel: [<c049d107>] ? e820_end_pfn+0xa0/0xbc Oct 19 02:08:53 m3000n crond[2295]: (CRON) STARTUP (4.3) Oct 19 02:08:54 m3000n kernel: [<c049b686>] setup_arch+0x50c/0xaf6 Oct 19 02:08:54 m3000n kernel: [<c0130979>] ? release_console_sem+0x1b9/0x1d0 Oct 19 02:08:54 m3000n kernel: [<c014925a>] ? down_trylock+0x2a/0x40 Oct 19 02:08:54 m3000n kernel: [<c0130d40>] ? vprintk+0x170/0x370 Oct 19 02:08:54 m3000n kernel: [<c049df7c>] ? __reserve_early+0x95/0x138 Oct 19 02:08:54 m3000n kernel: [<c049df7c>] ? __reserve_early+0x95/0x138 Oct 19 02:08:54 m3000n kernel: [<c049463b>] start_kernel+0x63/0x349 Oct 19 02:08:54 m3000n kernel: [<c049410a>] ? reserve_ebda_region+0x69/0x7f Oct 19 02:08:54 m3000n kernel: [<c0494099>] __init_begin+0x99/0xa1 Oct 19 02:08:54 m3000n kernel: ======================= Oct 19 02:08:54 m3000n kernel: ---[ end trace 4eaa2a86a8e2da22 ]--- Oct 19 02:08:54 m3000n kernel: update e820 for mtrr Oct 19 02:08:54 m3000n kernel: modified physical RAM map: Oct 19 02:08:54 m3000n kernel: modified: 0000000000000000 - 000000000009fc00 (usable) Oct 19 02:08:54 m3000n kernel: modified: 000000000009fc00 - 00000000000a0000 (reserved) Oct 19 02:08:54 m3000n kernel: modified: 00000000000e0000 - 0000000000100000 (reserved) Oct 19 02:08:54 m3000n kernel: modified: 0000000000100000 - 000000003f000000 (usable) Oct 19 02:08:54 m3000n kernel: modified: 000000003f000000 - 000000003f740000 (reserved) Oct 19 02:08:54 m3000n kernel: modified: 000000003f740000 - 000000003f750000 (ACPI data) Oct 19 02:08:54 m3000n kernel: modified: 000000003f750000 - 000000003f800000 (ACPI NVS) Oct 19 02:08:54 m3000n kernel: last_pfn = 0x3f000 max_arch_pfn = 0x100000 Oct 19 02:08:54 m3000n kernel: kernel direct mapping tables up to 38000000 @ 7000-c000 Oct 19 02:08:54 m3000n kernel: RAMDISK: 37c37000 - 37fef95e Oct 19 02:08:54 m3000n kernel: DMI 2.3 present. Oct 19 02:08:54 m3000n kernel: ACPI: RSDP 000F4B70, 0014 (r0 ACPIAM) Oct 19 02:08:54 m3000n kernel: ACPI: RSDT 3F740000, 002C (r1 A M I OEMRSDT 4000318 MSFT 97) Oct 19 02:08:54 m3000n kernel: ACPI: FACP 3F740200, 0081 (r2 A M I OEMFACP 4000318 MSFT 97) Oct 19 02:08:54 m3000n kernel: ACPI: DSDT 3F740300, 72E8 (r1 0ABBD 0ABBD001 1 MSFT 100000D) Oct 19 02:08:54 m3000n kernel: ACPI: FACS 3F750000, 0040 Oct 19 02:08:54 m3000n kernel: ACPI: OEMB 3F750040, 004D (r1 A M I OEMBIOS 4000318 MSFT 97) Oct 19 02:08:54 m3000n kernel: 112MB HIGHMEM available. Oct 19 02:08:54 m3000n kernel: 896MB LOWMEM available. Oct 19 02:08:54 m3000n kernel: mapped low ram: 0 - 38000000 Oct 19 02:08:54 m3000n kernel: low ram: 00000000 - 38000000 Oct 19 02:08:54 m3000n kernel: bootmap 00008000 - 0000f000 Oct 19 02:08:54 m3000n kernel: (9 early reservations) ==> bootmem [0000000000 - 0038000000] Oct 19 02:08:54 m3000n kernel: #0 [0000000000 - 0000001000] BIOS data page ==> [0000000000 - 0000001000] Oct 19 02:08:54 m3000n kernel: #1 [0000001000 - 0000002000] EX TRAMPOLINE ==> [0000001000 - 0000002000] Oct 19 02:08:54 m3000n kernel: #2 [0000006000 - 0000007000] TRAMPOLINE ==> [0000006000 - 0000007000] Oct 19 02:08:54 m3000n kernel: #3 [0000100000 - 0000544b20] TEXT DATA BSS ==> [0000100000 - 0000544b20] Oct 19 02:08:54 m3000n kernel: #4 [0037c37000 - 0037fef95e] RAMDISK ==> [0037c37000 - 0037fef95e] Oct 19 02:08:54 m3000n kernel: #5 [0000545000 - 0000548000] INIT_PG_TABLE ==> [0000545000 - 0000548000] Oct 19 02:08:54 m3000n kernel: #6 [000009fc00 - 0000100000] BIOS reserved ==> [000009fc00 - 0000100000] Oct 19 02:08:54 m3000n kernel: #7 [0000007000 - 0000008000] PGTABLE ==> [0000007000 - 0000008000] Oct 19 02:08:54 m3000n kernel: #8 [0000008000 - 000000f000] BOOTMAP ==> [0000008000 - 000000f000] Oct 19 02:08:54 m3000n kernel: Zone PFN ranges: Oct 19 02:08:54 m3000n kernel: DMA 0x00000000 -> 0x00001000 Oct 19 02:08:54 m3000n kernel: Normal 0x00001000 -> 0x00038000 Oct 19 02:08:54 m3000n kernel: HighMem 0x00038000 -> 0x0003f000 Oct 19 02:08:54 m3000n kernel: Movable zone start PFN for each node Oct 19 02:08:54 m3000n kernel: early_node_map[2] active PFN ranges Oct 19 02:08:54 m3000n kernel: 0: 0x00000000 -> 0x0000009f Oct 19 02:08:54 m3000n kernel: 0: 0x00000100 -> 0x0003f000 Oct 19 02:08:54 m3000n kernel: On node 0 totalpages: 257951 Oct 19 02:08:54 m3000n kernel: free_area_init_node: node 0, pgdat c0476300, node_mem_map c1000000 Oct 19 02:08:54 m3000n kernel: DMA zone: 3967 pages, LIFO batch:0 Oct 19 02:08:54 m3000n kernel: Normal zone: 223520 pages, LIFO batch:31 Oct 19 02:08:54 m3000n kernel: HighMem zone: 28448 pages, LIFO batch:7 Oct 19 02:08:54 m3000n kernel: ACPI: PM-Timer IO Port: 0xe408 Oct 19 02:08:54 m3000n kernel: SMP: Allowing 1 CPUs, 0 hotplug CPUs Oct 19 02:08:54 m3000n kernel: mapped APIC to ffffb000 (017e4000) Oct 19 02:08:54 m3000n kernel: PM: Registered nosave memory: 000000000009f000 - 00000000000a0000 Oct 19 02:08:54 m3000n kernel: PM: Registered nosave memory: 00000000000a0000 - 00000000000e0000 Oct 19 02:08:54 m3000n kernel: PM: Registered nosave memory: 00000000000e0000 - 0000000000100000 Oct 19 02:08:54 m3000n kernel: Allocating PCI resources starting at 40000000 (gap: 3f800000:c0800000) Oct 19 02:08:54 m3000n kernel: PERCPU: Allocating 40988 bytes of per cpu data Oct 19 02:08:54 m3000n kernel: NR_CPUS: 32, nr_cpu_ids: 1, nr_node_ids 1 Oct 19 02:08:54 m3000n kernel: Built 1 zonelists in Zone order, mobility grouping on. Total pages: 255935 Oct 19 02:08:54 m3000n kernel: Kernel command line: BOOT_IMAGE=2.6.27.1-pentium-m root=UUID=ea9115e4-8d53-468f-9319-e6ccf05af06b nolapic resume=UUID=60ab13c9-1e55-4a3b-91f1-91a767578d51 splash=silent vga=791 Oct 19 02:08:54 m3000n kernel: Enabling fast FPU save and restore... done. Oct 19 02:08:54 m3000n kernel: Enabling unmasked SIMD FPU exception support... done. Oct 19 02:08:54 m3000n kernel: Initializing CPU#0 Oct 19 02:08:54 m3000n kernel: PID hash table entries: 4096 (order: 12, 16384 bytes) Oct 19 02:08:54 m3000n kernel: TSC: PIT calibration confirmed by PMTIMER. Oct 19 02:08:54 m3000n kernel: TSC: using PMTIMER calibration value Oct 19 02:08:54 m3000n kernel: Detected 1600.045 MHz processor. Oct 19 02:08:54 m3000n kernel: Console: colour dummy device 80x25 Oct 19 02:08:54 m3000n kernel: console [tty0] enabled Oct 19 02:08:54 m3000n kernel: Dentry cache hash table entries: 131072 (order: 7, 524288 bytes) Oct 19 02:08:54 m3000n kernel: Inode-cache hash table entries: 65536 (order: 6, 262144 bytes) Oct 19 02:08:54 m3000n kernel: Memory: 1014316k/1032192k available (2473k kernel code, 17148k reserved, 1158k data, 336k init, 114688k highmem) Oct 19 02:08:54 m3000n kernel: virtual kernel memory layout: Oct 19 02:08:54 m3000n kernel: fixmap : 0xffe18000 - 0xfffff000 (1948 kB) Oct 19 02:08:54 m3000n kernel: pkmap : 0xff800000 - 0xffc00000 (4096 kB) Oct 19 02:08:54 m3000n kernel: vmalloc : 0xf8800000 - 0xff7fe000 ( 111 MB) Oct 19 02:08:54 m3000n kernel: lowmem : 0xc0000000 - 0xf8000000 ( 896 MB) Oct 19 02:08:54 m3000n kernel: .init : 0xc0494000 - 0xc04e8000 ( 336 kB) Oct 19 02:08:54 m3000n kernel: .data : 0xc036a696 - 0xc048c1a0 (1158 kB) Oct 19 02:08:54 m3000n kernel: .text : 0xc0100000 - 0xc036a696 (2473 kB) Oct 19 02:08:54 m3000n kernel: Checking if this processor honours the WP bit even in supervisor mode...Ok. Oct 19 02:08:54 m3000n kernel: CPA: page pool initialized 1 of 1 pages preallocated Oct 19 02:08:54 m3000n kernel: SLUB: Genslabs=12, HWalign=64, Order=0-3, MinObjects=0, CPUs=1, Nodes=1 Oct 19 02:08:54 m3000n kernel: Calibrating delay loop (skipped), value calculated using timer frequency.. 3200.09 BogoMIPS (lpj=1600045) Oct 19 02:08:54 m3000n kernel: Security Framework initialized Oct 19 02:08:54 m3000n kernel: Mount-cache hash table entries: 512 Oct 19 02:08:54 m3000n kernel: CPU: L1 I cache: 32K, L1 D cache: 32K Oct 19 02:08:54 m3000n kernel: CPU: L2 cache: 1024K Oct 19 02:08:54 m3000n kernel: Intel machine check architecture supported. Oct 19 02:08:54 m3000n kernel: Intel machine check reporting enabled on CPU#0. Oct 19 02:08:54 m3000n kernel: Checking 'hlt' instruction... OK. Oct 19 02:08:54 m3000n kernel: SMP alternatives: switching to UP code Oct 19 02:08:54 m3000n kernel: Freeing SMP alternatives: 12k freed Oct 19 02:08:54 m3000n kernel: ACPI: Core revision 20080609 Oct 19 02:08:54 m3000n kernel: ACPI: setting ELCR to 0200 (from 0830) Oct 19 02:08:54 m3000n kernel: weird, boot CPU (#0) not listedby the BIOS. Oct 19 02:08:54 m3000n kernel: SMP motherboard not detected. Oct 19 02:08:54 m3000n kernel: Local APIC not detected. Using dummy APIC emulation. Oct 19 02:08:54 m3000n kernel: SMP disabled Oct 19 02:08:54 m3000n kernel: Brought up 1 CPUs Oct 19 02:08:54 m3000n kernel: Total of 1 processors activated (3200.09 BogoMIPS). Oct 19 02:08:54 m3000n kernel: CPU0 attaching sched-domain: Oct 19 02:08:54 m3000n kernel: domain 0: span 0 level CPU Oct 19 02:08:54 m3000n kernel: groups: 0 Oct 19 02:08:54 m3000n kernel: net_namespace: 792 bytes Oct 19 02:08:54 m3000n kernel: Booting paravirtualized kernel on bare hardware Oct 19 02:08:54 m3000n kernel: NET: Registered protocol family 16 Oct 19 02:08:54 m3000n kernel: ACPI: bus type pci registered Oct 19 02:08:54 m3000n kernel: PCI: Using configuration type 1 for base access Oct 19 02:08:54 m3000n kernel: ACPI: EC: Look up EC in DSDT Oct 19 02:08:54 m3000n kernel: ACPI: EC: non-query interrupt received, switching to interrupt mode Oct 19 02:08:54 m3000n kernel: ACPI: Interpreter enabled Oct 19 02:08:54 m3000n kernel: ACPI: (supports S0 S1 S3 S4 S5) Oct 19 02:08:54 m3000n kernel: ACPI: Using PIC for interrupt routing Oct 19 02:08:54 m3000n kernel: ACPI: EC: GPE = 0x1c, I/O: command/status = 0x66, data = 0x62 Oct 19 02:08:54 m3000n kernel: ACPI: EC: driver started in interrupt mode Oct 19 02:08:54 m3000n kernel: ACPI: PCI Root Bridge [PCI0] (0000:00)