Xorg crashed with SIGSEGV in XIGetDeviceProperty()

[Alexander Sack]

X11 crashes randomly and quite often for me on precise ... this is a x220 thinkpad. doesnt matter whether I run unity 2d or unity proper.

ProblemType: Crash
DistroRelease: Ubuntu 12.04
Package: xserver-xorg-core 2:1.11.4-0ubuntu3
ProcVersionSignature: Ubuntu 3.2.0-16.25-generic 3.2.6
Uname: Linux 3.2.0-16-generic i686
.tmp.unity.support.test.0:

ApportVersion: 1.92-0ubuntu1
Architecture: i386
CompizPlugins: [core,bailer,detection,composite,opengl,decor,mousepoll,vpswitch,regex,animation,snap,expo,move,compiztoolbox,place,grid,imgpng,gnomecompat,wall,ezoom,workarounds,resize,fade,unitymtgrabhandles,scale,session,unityshell]
CompositorRunning: None
CrashCounter: 1
Date: Tue Feb 21 13:29:46 2012
DistUpgraded: Log time: 2012-02-17 12:55:09.460574
DistroCodename: precise
DistroVariant: ubuntu
ExecutablePath: /usr/bin/Xorg
ExecutableTimestamp: 1329178154
ExtraDebuggingInterest: Yes, whatever it takes to get this fixed in Ubuntu
GraphicsCard:
 Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller [8086:0126] (rev 09) (prog-if 00 [VGA controller])
   Subsystem: Lenovo Device [17aa:21da]
MachineType: LENOVO 4286CTO
ProcCmdline: /usr/bin/X :1 -auth /var/run/lightdm/root/:1 -nolisten tcp vt7 -novtswitch
ProcCwd: /etc/X11
ProcEnviron:

ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-16-generic root=UUID=092c7391-4af6-423f-8498-5a03021b8bb7 ro quiet splash pcie_aspm=force i915.i915_enable_rc6=1 vt.handoff=7
SegvAnalysis:
 Segfault happened at: 0x54b4a8 <XIChangeDeviceProperty+440>: mov 0x8(%esi),%eax
 PC (0x0054b4a8) ok
 source "0x8(%esi)" (0x00000009) not located in a known VMA region (needed readable region)!
 destination "%eax" ok
SegvReason: reading NULL VMA
Signal: 11
SourcePackage: xorg-server
StacktraceTop:
 XIGetDeviceProperty ()
 ?? ()
 ?? ()
 ?? ()
 ?? ()
Title: Xorg crashed with SIGSEGV in XIGetDeviceProperty()
UpgradeStatus: Upgraded to precise on 2012-02-17 (4 days ago)
UserGroups:

dmi.bios.date: 05/18/2011
dmi.bios.vendor: LENOVO
dmi.bios.version: 8DET46WW (1.16 )
dmi.board.asset.tag: Not Available
dmi.board.name: 4286CTO
dmi.board.vendor: LENOVO
dmi.board.version: Not Available
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Not Available
dmi.modalias: dmi:bvnLENOVO:bvr8DET46WW(1.16):bd05/18/2011:svnLENOVO:pn4286CTO:pvrThinkPadX220:rvnLENOVO:rn4286CTO:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.name: 4286CTO
dmi.product.version: ThinkPad X220
dmi.sys.vendor: LENOVO
version.compiz: compiz 1:0.9.7.0~bzr2995-0ubuntu4
version.libdrm2: libdrm2 2.4.30-1ubuntu1
version.libgl1-mesa-dri: libgl1-mesa-dri 8.0~rc2-0ubuntu5
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 8.0~rc2-0ubuntu5
version.xserver-xorg-core: xserver-xorg-core 2:1.11.4-0ubuntu3
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.6.99.901+git20120126-0ubuntu2
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:6.14.99~git20111219.aacbd629-0ubuntu2
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.17.0-1ubuntu4
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:0.0.16+git20111201+b5534a1-1build2

[Apport retracing service (apport)]

StacktraceTop:
 XIGetDeviceProperty (dev=0x22559ed0, property=275, value=0xbfd318ac) at ../../Xi/xiproperty.c:852
 get_property (dev=<optimized out>, property=275, type=19, offset=0, length=1, bytes_after=0xbfd31954, type_return=0xbfd3195c, format=0xbfd3194c, nitems=0xbfd31950, length_return=0xbfd31948, data=0xbfd31958, delete=<optimized out>, client=<optimized out>) at ../../Xi/xiproperty.c:290
 get_property (data=0xbfd31958, length_return=0xbfd31948, nitems=0xbfd31950, format=0xbfd3194c, type_return=0xbfd3195c, bytes_after=0xbfd31954, length=1, offset=0, delete=0 '\000', type=19, property=275, dev=0x22559ed0, client=<optimized out>) at ../../Xi/xiproperty.c:272
 ProcXGetDeviceProperty (client=0x225be9e0) at ../../Xi/xiproperty.c:991
 ProcIDispatch (client=0x225be9e0) at ../../Xi/extinit.c:415