Machine randomly reboots for no reason

[Laura Czajkowski]

Binary package hint: xorg

Since doing upgrades about three weeks ago, the machine will randomly reboot itself when doing nothing in particular so very hard to reproduce. It goes to boot up screen and then login and back to normal. Nothing sets it off, and it never happens after I do an update/upgrade.

ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: xorg 1:7.6+4ubuntu3.1
ProcVersionSignature: Ubuntu 2.6.38-9.43-generic 2.6.38.4
Uname: Linux 2.6.38-9-generic i686
Architecture: i386
CompizPlugins: [core,bailer,detection,composite,opengl,decor,mousepoll,vpswitch,regex,animation,snap,expo,move,compiztoolbox,place,grid,imgpng,gnomecompat,wall,ezoom,workarounds,staticswitcher,resize,fade,unitymtgrabhandles,scale,session,unityshell]
CompositorRunning: compiz
Date: Thu May 26 08:33:10 2011
DistUpgraded: Log time: 2011-03-13 16:25:44.197870
DistroCodename: natty
DistroVariant: ubuntu
DkmsStatus:
 virtualbox-ose, 4.0.4, 2.6.38-8-generic, i686: installed
 virtualbox-ose, 4.0.4, 2.6.38-9-generic, i686: installed
GraphicsCard:
 Intel Corporation Mobile GM965/GL960 Integrated Graphics Controller (primary) [8086:2a02] (rev 03) (prog-if 00 [VGA controller])
   Subsystem: Toshiba America Info Systems Device [1179:ff40]
   Subsystem: Toshiba America Info Systems Device [1179:ff40]
MachineType: TOSHIBA Equium L40
ProcEnviron:
 LANGUAGE=en_IE:en
 PATH=(custom, user)
 LANG=en_IE.UTF-8
 SHELL=/bin/bash
ProcKernelCmdLine: root=UUID=893cc2ab-a560-4113-8e60-f234d787b29f ro quiet splash
Renderer: Unknown
SourcePackage: xorg
UpgradeStatus: Upgraded to natty on 2011-03-13 (73 days ago)
dmi.bios.date: 05/14/2008
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: V2.00
dmi.board.asset.tag: To Be Filled By O.E.M.
dmi.board.name: Equium L40
dmi.board.vendor: TOSHIBA
dmi.board.version: 1.0
dmi.chassis.type: 10
dmi.chassis.vendor: TOSHIBA
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrV2.00:bd05/14/2008:svnTOSHIBA:pnEquiumL40:pvrPSL49E-00C005KS:rvnTOSHIBA:rnEquiumL40:rvr1.0:cvnTOSHIBA:ct10:cvr:
dmi.product.name: Equium L40
dmi.product.version: PSL49E-00C005KS
dmi.sys.vendor: TOSHIBA
version.compiz: compiz N/A
version.libdrm2: libdrm2 2.4.23-1ubuntu6
version.libgl1-mesa-dri: libgl1-mesa-dri 7.10.2-0ubuntu2
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 7.10.2-0ubuntu2
version.xserver-xorg: xserver-xorg 1:7.6+4ubuntu3.1
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:6.14.0-0ubuntu4
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.14.0-4ubuntu7.1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:0.0.16+git20110107+b795ca6e-0ubuntu7

[Laura Czajkowski (czajkowski)]

adding old log also as was suggested on irc

[Jean-Baptiste Lallement (jibel)]

Thanks for your report.

This looks like a X segfault:
[ 1061.200] 0: /usr/bin/X (xorg_backtrace+0x3b) [0x80eab2b]
[ 1061.200] 1: /usr/bin/X (0x8048000+0x5fad8) [0x80a7ad8]
[ 1061.200] 2: (vdso) (__kernel_rt_sigreturn+0x0) [0x11940c]
[ 1061.200] 3: /usr/bin/X (_CallCallbacks+0x3e) [0x8074e1e]
[ 1061.200] 4: /usr/bin/X (WriteToClient+0x267) [0x80a7617]
[ 1061.200] 5: /usr/lib/xorg/modules/extensions/libdri2.so (ProcDRI2WaitMSCReply+0x62) [0x1cdbf2]
[ 1061.200] 6: /usr/lib/xorg/modules/extensions/libdri2.so (DRI2WaitMSCComplete+0x75) [0x1cbfc5]
[ 1061.227] 7: /usr/lib/xorg/modules/drivers/intel_drv.so (0x26e000+0x226bc) [0x2906bc]
[ 1061.227] 8: /usr/lib/xorg/modules/drivers/intel_drv.so (0x26e000+0x87d2) [0x2767d2]
[ 1061.227] 9: /lib/i386-linux-gnu/libdrm.so.2 (drmHandleEvent+0xf5) [0x1c7665]
[ 1061.227] 10: /usr/lib/xorg/modules/drivers/intel_drv.so (0x26e000+0x7937) [0x275937]
[ 1061.227] 11: /usr/bin/X (WakeupHandler+0x52) [0x8074602]
[ 1061.227] 12: /usr/bin/X (WaitForSomething+0x1ba) [0x80a1f4a]
[ 1061.227] 13: /usr/bin/X (0x8048000+0x27f1e) [0x806ff1e]
[ 1061.227] 14: /usr/bin/X (0x8048000+0x1a81c) [0x806281c]
[ 1061.227] 15: /lib/i386-linux-gnu/libc.so.6 (__libc_start_main+0xe7) [0x5ace37]
[ 1061.227] 16: /usr/bin/X (0x8048000+0x1a411) [0x8062411]
[ 1061.227] Segmentation fault at address 0xb6b7a008
[ 1061.227]
Caught signal 11 (Segmentation fault). Server aborting

Could you provide a full backtrace following the instructions at https://wiki.ubuntu.com/X/Backtracing ?