Crash in evdev module

[Sasa Paporovic]

[Problem]
X crashed:

Backtrace:
[ 12377.329] 0: /usr/bin/X (xorg_backtrace+0x26) [0x460566]
[ 12377.329] 1: /usr/bin/X (0x400000+0x64b6a) [0x464b6a]
[ 12377.329] 2: /lib/x86_64-linux-gnu/libpthread.so.0 (0x7f2845f51000+0x10060) [0x7f2845f61060]
[ 12377.329] 3: /usr/lib/xorg/modules/input/evdev_drv.so (0x7f283f5a4000+0x6ee9) [0x7f283f5aaee9]
[ 12377.329] 4: /usr/bin/X (WakeupHandler+0x5b) [0x433a6b]
[ 12377.329] 5: /usr/bin/X (WaitForSomething+0x1b6) [0x45e016]
[ 12377.329] 6: /usr/bin/X (0x400000+0x2f912) [0x42f912]
[ 12377.329] 7: /usr/bin/X (0x400000+0x232fe) [0x4232fe]
[ 12377.329] 8: /lib/x86_64-linux-gnu/libc.so.6 (__libc_start_main+0xed) [0x7f2844e7a30d]
[ 12377.329] 9: /usr/bin/X (0x400000+0x235ed) [0x4235ed]
[ 12377.329] Segmentation fault at address (nil)
[ 12377.329]
Caught signal 11 (Segmentation fault). Server aborting

[Original Report]
I was running several programs on unity desktop 5 on Ubuntu 12.04 (updated to 15.1.2012), also package installations.

There happends a automatically session logout , which I have not introduced, out of nothing.

I came back to the Ubuntu startslash for logging in automatically. A login in a unity session brings a new session on.

The gnome-system-monitor is still showing the programs running from the privious session, but I could not access them from my new logging in. So the old session seems to be running anywhere and anyhow.

That's a very bad behaviour. I have not saved my work and no chance to enter the running processes for that anymore, so dataloose is the consequence.
As special add: Package installation has not finished it's work, or better: I be not sure that it has done all installations with success.

Because I have had not made any updates/upgrades with this run I am optimistic that a newstart of the system does not break boot abilities, but think of this during an update/upgrade. -> The system may become broken.

I see this as critical bug.

Because of not knowing what happens exactly I have filed this against unity v5 with apport call, so you have all logs which gathered by apport.

When you have the need for further logs or doings, tell me.

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: unity 5.0.0-0ubuntu1
ProcVersionSignature: Ubuntu 3.2.0-8.15-generic 3.2.0
Uname: Linux 3.2.0-8-generic x86_64
.tmp.unity.support.test.0:

ApportVersion: 1.90-0ubuntu2
Architecture: amd64
CompizPlugins: [core,bailer,detection,composite,opengl,compiztoolbox,decor,move,grid,place,regex,gnomecompat,vpswitch,imgpng,session,unitymtgrabhandles,resize,animation,mousepoll,snap,wall,fade,workarounds,expo,ezoom,scale,unityshell]
CompositorRunning: compiz
Date: Sun Jan 15 15:17:29 2012
DistUpgraded: Log time: 2011-12-31 14:46:56.787767
DistroCodename: precise
DistroVariant: ubuntu
DkmsStatus:
 blcr, 0.8.2: added
 virtualbox, 4.1.8, 3.2.0-8-generic, x86_64: installed
GraphicsCard:
 ATI Technologies Inc RS780L [Radeon HD 3000] [1002:9616] (prog-if 00 [VGA controller])
   Subsystem: Micro-Star International Co., Ltd. Device [1462:7501]
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111012)
MachineType: MICRO-STAR INTERNATIONAL CO.,LTD MS-7596
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-8-generic root=UUID=c14f33f4-d5f6-44ae-b4fb-cb9538e347e5 ro crashkernel=384M-2G:64M,2G-:128M quiet splash vt.handoff=7
SourcePackage: unity
UpgradeStatus: Upgraded to precise on 2011-12-31 (14 days ago)
dmi.bios.date: 09/03/2010
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: V1.8
dmi.board.asset.tag: To Be Filled By O.E.M.
dmi.board.name: 760GM -E51 (MS-7596)
dmi.board.vendor: MICRO-STAR INTERNATIONAL CO.,LTD
dmi.board.version: 1.0
dmi.chassis.asset.tag: To Be Filled By O.E.M.
dmi.chassis.type: 3
dmi.chassis.vendor: MICRO-STAR INTERNATIONAL CO.,LTD
dmi.chassis.version: 1.0
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrV1.8:bd09/03/2010:svnMICRO-STARINTERNATIONALCO.,LTD:pnMS-7596:pvr1.0:rvnMICRO-STARINTERNATIONALCO.,LTD:rn760GM-E51(MS-7596):rvr1.0:cvnMICRO-STARINTERNATIONALCO.,LTD:ct3:cvr1.0:
dmi.product.name: MS-7596
dmi.product.version: 1.0
dmi.sys.vendor: MICRO-STAR INTERNATIONAL CO.,LTD
version.compiz: compiz 1:0.9.6+bzr20110929-0ubuntu8
version.ia32-libs: ia32-libs 20090808ubuntu33
version.libdrm2: libdrm2 2.4.30-1ubuntu1
version.libgl1-mesa-dri: libgl1-mesa-dri 7.11-0ubuntu4
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 7.11-0ubuntu4
version.xserver-xorg-core: xserver-xorg-core 2:1.10.4-1ubuntu6
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.6.0-1ubuntu13
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:6.14.99~git20110811.g93fc084-0ubuntu1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.15.901-1ubuntu4
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:0.0.16+git20111201+b5534a1-1

[Sasa Paporovic (melchiaros)]

I have just looked over the kernel log. There are no entries that differ from the normal system behaviour.

[Sasa Paporovic (melchiaros)]

After a system newstart I must run dpkg --configure -a to clean up the system configuration.

The installation process was interupted by the automatically logout.

[Bilal Akhtar (bilalakhtar)]

Looking at XorgLogOld.txt, this clearly seems to be an X server segfault:

Backtrace:
[ 12377.329] 0: /usr/bin/X (xorg_backtrace+0x26) [0x460566]
[ 12377.329] 1: /usr/bin/X (0x400000+0x64b6a) [0x464b6a]
[ 12377.329] 2: /lib/x86_64-linux-gnu/libpthread.so.0 (0x7f2845f51000+0x10060) [0x7f2845f61060]
[ 12377.329] 3: /usr/lib/xorg/modules/input/evdev_drv.so (0x7f283f5a4000+0x6ee9) [0x7f283f5aaee9]
[ 12377.329] 4: /usr/bin/X (WakeupHandler+0x5b) [0x433a6b]
[ 12377.329] 5: /usr/bin/X (WaitForSomething+0x1b6) [0x45e016]
[ 12377.329] 6: /usr/bin/X (0x400000+0x2f912) [0x42f912]
[ 12377.329] 7: /usr/bin/X (0x400000+0x232fe) [0x4232fe]
[ 12377.329] 8: /lib/x86_64-linux-gnu/libc.so.6 (__libc_start_main+0xed) [0x7f2844e7a30d]
[ 12377.329] 9: /usr/bin/X (0x400000+0x235ed) [0x4235ed]
[ 12377.329] Segmentation fault at address (nil)
[ 12377.329]
Caught signal 11 (Segmentation fault). Server aborting
[ 12377.329]
Please consult the The X.Org Foundation support
  at http://wiki.x.org
 for help.
[ 12377.329] Please also check the log file at "/var/log/Xorg.0.log" for additional information.

[Bryce Harrington (bryce)]

Please collect a full backtrace on this crash - see http://wiki.ubuntu.com/X/Backtracing for guidance.

[Sasa Paporovic (melchiaros)]

Can not do that. The crasher comes sometimes, not always.

[Bryce Harrington (bryce)]

Alright, well we can't investigate it without a better stacktrace so I'll close it. Feel free to reopen if you get a full backtrace.