Xorg crashed with SIGSEGV in XIGetDeviceProperty()

[Andy Whitcroft]

X froze and then lightdm restarted it. No obvious trigger.

ProblemType: Crash
DistroRelease: Ubuntu 12.10
Package: xserver-xorg-core 2:1.12.1.902-1ubuntu1
ProcVersionSignature: Ubuntu 3.5.0-5.5-generic 3.5.0-rc7
Uname: Linux 3.5.0-5-generic i686
.tmp.unity.support.test.0:

ApportVersion: 2.4-0ubuntu3
Architecture: i386
CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
CompositorRunning: compiz
Date: Thu Jul 19 13:37:37 2012
DistUpgraded: 2012-01-04 15:45:41,254 DEBUG enabling apt cron job
DistroCodename: quantal
DistroVariant: ubuntu
ExecutablePath: /usr/bin/Xorg
ExtraDebuggingInterest: Yes, even including gdb or git bisection work if needed
GraphicsCard:
 Intel Corporation Atom Processor D4xx/D5xx/N4xx/N5xx Integrated Graphics Controller [8086:a011] (prog-if 00 [VGA controller])
   Subsystem: Acer Incorporated [ALI] Device [1025:0349]
   Subsystem: Acer Incorporated [ALI] Device [1025:0349]
InstallationMedia: Ubuntu 10.04 LTS "Lucid Lynx" - Release i386 (20100429)
MachineType: Acer AO533
ProcCmdline: /usr/bin/X :0 -auth /var/run/lightdm/root/:0 -nolisten tcp vt7 -novtswitch -background none
ProcEnviron:

ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.5.0-5-generic root=UUID=10dbafb4-5a21-4665-88d4-2924132ca353 ro quiet splash "acpi_osi=!Windows 2009" initcall_debug log_buf_len=256K vt.handoff=7
SegvAnalysis:
 Segfault happened at: 0xb76906c8 <XIChangeDeviceProperty+408>: mov 0x8(%ebp),%eax
 PC (0xb76906c8) ok
 source "0x8(%ebp)" (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 quantal on 2012-01-04 (197 days ago)
UserGroups:

dmi.bios.date: 06/07/2010
dmi.bios.vendor: Acer
dmi.bios.version: V1.05
dmi.board.asset.tag: Base Board Asset Tag
dmi.board.name: AO533
dmi.board.vendor: Acer
dmi.board.version: V1.05
dmi.chassis.type: 10
dmi.chassis.vendor: Acer
dmi.chassis.version: V1.05
dmi.modalias: dmi:bvnAcer:bvrV1.05:bd06/07/2010:svnAcer:pnAO533:pvrV1.05:rvnAcer:rnAO533:rvrV1.05:cvnAcer:ct10:cvrV1.05:
dmi.product.name: AO533
dmi.product.version: V1.05
dmi.sys.vendor: Acer
version.compiz: compiz 1:0.9.8+bzr3249-0ubuntu2
version.libdrm2: libdrm2 2.4.37-0ubuntu2
version.libgl1-mesa-dri: libgl1-mesa-dri 8.0.3-0ubuntu1
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 8.0.3-0ubuntu1
version.xserver-xorg-core: xserver-xorg-core 2:1.12.1.902-1ubuntu1
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.7.0-0ubuntu2
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:6.14.99~really6.14.4-0ubuntu2
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.19.0-1ubuntu2
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.1-1build1

[Apport retracing service (apport)]

Thank you for taking the time to report this crash and helping to make this software better. This particular crash has already been reported and is a duplicate of bug #956071, so is being marked as such. Please look at the other bug report to see if there is any missing information that you can provide, or to see if there is a workaround for the bug. Additionally, any further discussion regarding the bug should occur in the other report. Please continue to report any other bugs you may find.