unity-panel-service crashed with SIGSEGV in g_type_check_instance_cast()

[Brendan Donegan]

Was playing around with Universal Access settings in Gnome Control Panel. Turned screen reader on and was trying to change Contrast settings.

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ProblemType: Crash
DistroRelease: Ubuntu 11.10
Package: unity-services 4.2.0-0ubuntu2
ProcVersionSignature: Ubuntu 3.0.0-4.5-generic-pae 3.0.0-rc6
Uname: Linux 3.0.0-4-generic-pae i686
Architecture: i386
CompizPlugins: [core,bailer,detection,composite,opengl,decor,compiztoolbox,snap,gnomecompat,vpswitch,imgpng,grid,move,resize,unitymtgrabhandles,mousepoll,place,titleinfo,regex,text,shift,animation,wall,session,workarounds,expo,ezoom,staticswitcher,fade,scale,scaleaddon,unityshell]
CompositorRunning: compiz
CrashCounter: 1
Date: Wed Jul 13 15:50:13 2011
DistUpgraded: Log time: 2011-07-01 23:02:06.721149
DistroCodename: oneiric
DistroVariant: ubuntu
DkmsStatus:
 virtualbox, 4.0.10, 3.0.0-4-generic-pae, i686: installed
 virtualbox, 4.0.10, 3.0-2-generic-pae, i686: installed
 virtualbox, 4.0.10, 3.0-3-generic-pae, i686: installed
EcryptfsInUse: Yes
ExecutablePath: /usr/lib/unity/unity-panel-service
GraphicsCard:
 ATI Technologies Inc Mobility Radeon HD 3400 Series [1002:95c4] (prog-if 00 [VGA controller])
   Subsystem: Hewlett-Packard Company Device [103c:30dc]
MachineType: Hewlett-Packard HP EliteBook 6930p
PccardctlIdent:
 Socket 0:
   product info: "RICOH", "Bay8Controller", "", ""
   manfid: 0x0000, 0x0000
   function: 254 (unknown)
PccardctlStatus:
 Socket 0:
   3.3V 16-bit PC Card
   Subdevice 0 (function 0) bound to driver "pata_pcmcia"
ProcCmdline: /usr/lib/unity/unity-panel-service
ProcEnviron:
 SHELL=/bin/bash
 LANGUAGE=en_GB:en
 LANG=en_GB.UTF-8
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.0.0-4-generic-pae root=UUID=078a4db6-8235-4d26-83cf-e5e77b7e70f1 ro quiet splash pcie_aspm=force vt.handoff=7
Renderer: Unknown
SegvAnalysis:
 Segfault happened at: 0xb708d558 <g_type_check_instance_cast+56>: mov (%eax),%ebp
 PC (0xb708d558) ok
 source "(%eax)" (0x00000008) not located in a known VMA region (needed readable region)!
 destination "%ebp" ok
SegvReason: reading NULL VMA
Signal: 11
SourcePackage: unity
StacktraceTop:
 g_type_check_instance_cast () from /usr/lib/i386-linux-gnu/libgobject-2.0.so.0
 ?? () from /usr/lib/gtk-3.0/modules/libgail.so
 g_cclosure_marshal_VOID__PARAM () from /usr/lib/i386-linux-gnu/libgobject-2.0.so.0
 g_closure_invoke () from /usr/lib/i386-linux-gnu/libgobject-2.0.so.0
 ?? () from /usr/lib/i386-linux-gnu/libgobject-2.0.so.0
Title: unity-panel-service crashed with SIGSEGV in g_type_check_instance_cast()
UpgradeStatus: Upgraded to oneiric on 2011-07-08 (5 days ago)
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare
dmi.bios.date: 06/08/2010
dmi.bios.vendor: Hewlett-Packard
dmi.bios.version: 68PCD Ver. F.19
dmi.board.name: 30DC
dmi.board.vendor: Hewlett-Packard
dmi.board.version: KBC Version 87.2B
dmi.chassis.type: 10
dmi.chassis.vendor: Hewlett-Packard
dmi.modalias: dmi:bvnHewlett-Packard:bvr68PCDVer.F.19:bd06/08/2010:svnHewlett-Packard:pnHPEliteBook6930p:pvrF.19:rvnHewlett-Packard:rn30DC:rvrKBCVersion87.2B:cvnHewlett-Packard:ct10:cvr:
dmi.product.name: HP EliteBook 6930p
dmi.product.version: F.19
dmi.sys.vendor: Hewlett-Packard
version.compiz: compiz 1:0.9.4+bzr20110606-0ubuntu6
version.libdrm2: libdrm2 2.4.26-1ubuntu1
version.libgl1-mesa-dri: libgl1-mesa-dri 7.11~1-0ubuntu3
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 7.11~1-0ubuntu3
version.xserver-xorg: xserver-xorg 1:7.6+7ubuntu1
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:6.14.2-1ubuntu2
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.15.0-3ubuntu2
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:0.0.16+git20110411+8378443-1

[Apport retracing service (apport)]

Thank you for taking the time to report this crash and helping to make Ubuntu better. This particular crash has already been reported and is a duplicate of bug #810145, 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.