System crashes randomly

[Pierre Rudloff]

Since I have updated libc this morning, my system crashes randomly (black screen with debug output).

ProblemType: Bug
DistroRelease: Ubuntu 11.10
Package: libc-bin 2.13-20ubuntu5.1
ProcVersionSignature: Ubuntu 3.0.0-16.29-generic 3.0.20
Uname: Linux 3.0.0-16-generic i686
ApportVersion: 1.23-0ubuntu4
Architecture: i386
Date: Fri Mar 9 12:42:26 2012
Dependencies:

SourcePackage: eglibc
UpgradeStatus: No upgrade log present (probably fresh install)
---
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
ApportVersion: 1.23-0ubuntu4
Architecture: i386
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: pierre 1572 F.... pulseaudio
                      pierre 1651 F.... xfce4-volumed
CRDA: Error: [Errno 2] Aucun fichier ou dossier de ce type
Card0.Amixer.info:
 Card hw:0 'Intel'/'HDA Intel at 0x50440000 irq 43'
   Mixer name : 'SigmaTel STAC9221 A1'
   Components : 'HDA:83847680,106b2200,00103401'
   Controls : 21
   Simple ctrls : 13
DistroRelease: Ubuntu 11.10
HibernationDevice: RESUME=UUID=64a9213e-1288-4cc7-a492-9c794cd144b1
MachineType: Apple Inc. MacBook2,1
Package: linux (not installed)
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.0.0-16-generic root=UUID=c2be4ec7-8fb8-4ddd-8435-3e42cd8992bb ro quiet splash vt.handoff=7
ProcVersionSignature: Ubuntu 3.0.0-16.29-generic 3.0.20
RelatedPackageVersions:
 linux-restricted-modules-3.0.0-16-generic N/A
 linux-backports-modules-3.0.0-16-generic N/A
 linux-firmware 1.60
Tags: oneiric
Uname: Linux 3.0.0-16-generic i686
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm admin cdrom dialout dip fax floppy fuse lpadmin mythtv plugdev sambashare tape video
dmi.bios.date: 06/27/07
dmi.bios.vendor: Apple Inc.
dmi.bios.version: MB21.88Z.00A5.B07.0706270922
dmi.board.asset.tag: Base Board Asset Tag
dmi.board.name: Mac-F4208CAA
dmi.board.vendor: Apple Inc.
dmi.board.version: PVT
dmi.chassis.asset.tag: Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: Apple Inc.
dmi.chassis.version: Mac-F4208CAA
dmi.modalias: dmi:bvnAppleInc.:bvrMB21.88Z.00A5.B07.0706270922:bd06/27/07:svnAppleInc.:pnMacBook2,1:pvr1.0:rvnAppleInc.:rnMac-F4208CAA:rvrPVT:cvnAppleInc.:ct10:cvrMac-F4208CAA:
dmi.product.name: MacBook2,1
dmi.product.version: 1.0
dmi.sys.vendor: Apple Inc.

[Steve Beattie (sbeattie)]

Hi Pierre,

In what way are things crashing? Do you have any crash reports in /var/crash? Are there any messages in /var/log/syslog that might give an indication what's going wrong?

Thanks!

[Marc Deslauriers (mdeslaur)]

What's written on the back screen? Can you take a picture of the text on the back screen when it's crashed?

[Pierre Rudloff (rudloff)]

I don't have anything in /var/crash and did not find anything related to it in /var/log/syslog.
It crashes suddenly when I am not doing anything in particular and outputs something about kthread.
I can try to note it down the next time it happens.

[Pierre Rudloff (rudloff)]

Here are pictures of two different crashes.

I can't be sure, but it seems to happen only when I am using Firefox or Thunderbird. (It did not crash for a few hours last night, while I was only using Pidgin, VLC and Rhythmbox; it crashes every ten minutes now that I am trying to read my e-mails and check my RSS feeds.)
Last time, it happened when I clicked the "Sync now" menu item in Firefox.

[Steve Beattie (sbeattie)]

Pierre, what you're seeing are kernel oops, adding a linux kernel task to the bug report. Can you confirm that you don't see these oops if you downgrade libc to the earlier version? e.g.

  apt-get install libc6=2.13-20ubuntu5 libc-bin=2.13-20ubuntu5

(You may need to add additonal packages to your apt-get install line, similarly formatted)

[Brad Figg (brad-figg)]

This bug is missing log files that will aid in diagnosing the problem. From a terminal window please run:

apport-collect 950775

and then change the status of the bug to 'Confirmed'.

If, due to the nature of the issue you have encountered, you are unable to run this command, please add a comment stating that fact and change the bug status to 'Confirmed'.

This change has been made by an automated script, maintained by the Ubuntu Kernel Team.

[Pierre Rudloff (rudloff)]

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[Pierre Rudloff (rudloff)]

I haven't had any oops since I downgraded libc two days ago so I think I can confirm it is caused by libc.

[penalvch (penalvch)]

Pierre Rudloff, thank you for reporting this bug and helping make Ubuntu better. With the newest eglibc installed, could you please attach all relevant information noted in: https://wiki.ubuntu.com/DebuggingKernelOops ?

[Launchpad Janitor (janitor)]

[Expired for eglibc (Ubuntu) because there has been no activity for 60 days.]

[Launchpad Janitor (janitor)]

[Expired for linux (Ubuntu) because there has been no activity for 60 days.]