compiz crashed with SIGSEGV in g_source_unref()

[Zephcom]

Binary package hint: compiz

I entered 'unity' in a terminal window.

The screen flashed a few times and the crash report came up.

ProblemType: Crash
DistroRelease: Ubuntu 11.04
Package: compiz-core 1:0.9.4+bzr20110415-0ubuntu1
ProcVersionSignature: Ubuntu 2.6.38-8.42-generic 2.6.38.2
Uname: Linux 2.6.38-8-generic i686
Architecture: i386
CompizPlugins: [core,bailer,detection,composite,opengl,compiztoolbox,decor,regex,text,snap,gnomecompat,grid,move,imgpng,mousepoll,place,vpswitch,animation,resize,unitymtgrabhandles,wall,workarounds,session,expo,ezoom,staticswitcher,fade,scale,unityshell]
CompositorRunning: compiz
CrashCounter: 1
DRM.card0.VGA.1:
 status: connected
 enabled: enabled
 dpms: On
 modes: 1366x768 1280x1024 1280x960 1024x768 800x600 640x480 720x400
 edid-base64: AP///////wAOESYoAQEBAQQUAQNoKRd47u6Vo1RMmSYPUFShCACBQIGAAQEBAQEBAQEBAQEBZiFWqlEAHjBGjzMAmuYQAAAfAAAA/QAwTBhTDgAKICAgICAgAAAA/ABDb21wYXEgUTE4NTkKAAAA/wAzQ1EwMDQwVFMyCiAgAMc=
Date: Sat Apr 16 12:09:42 2011
DistUpgraded: Fresh install
DistroCodename: natty
DistroVariant: ubuntu
EcryptfsInUse: Yes
ExecutablePath: /usr/bin/compiz
GraphicsCard:
 nVidia Corporation G71 [GeForce 7300 GS] [10de:01df] (rev a1) (prog-if 00 [VGA controller])
   Subsystem: Device [196e:034e]
MachineType: HP Pavilion 061 EL473AA-ABA a1357c
ProcCmdline: compiz
ProcEnviron:
 LANGUAGE=en_US:en
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.38-8-generic root=UUID=0a2997cc-30dd-4b4d-8059-487aeaabd1e0 ro quiet splash vt.handoff=7
ProcVersionSignature_: Ubuntu 2.6.38-8.42-generic 2.6.38.2
Renderer: Unknown
SegvAnalysis:
 Segfault happened at: 0x3cbd99 <g_source_unref+25>: mov 0x10(%eax),%edx
 PC (0x003cbd99) ok
 source "0x10(%eax)" (0x0000021f) not located in a known VMA region (needed readable region)!
 destination "%edx" ok
SegvReason: reading NULL VMA
Signal: 11
SourcePackage: compiz
StacktraceTop:
 g_source_unref () from /lib/i386-linux-gnu/libglib-2.0.so.0
 Glib::Source::unreference() const () from /usr/lib/libglibmm-2.4.so.1
 PrivateScreen::~PrivateScreen() ()
 PrivateScreen::~PrivateScreen() ()
 CompScreen::~CompScreen() ()
Title: compiz crashed with SIGSEGV in g_source_unref()
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare
XsessionErrors:
 (<unknown>:1597): dee-WARNING **: Transaction from com.canonical.Unity.FilesPlace.SectionsModel is in the past. Ignoring transaction.
 (<unknown>:1597): dee-WARNING **: Transaction from com.canonical.Unity.FilesPlace.GroupsModel is in the past. Ignoring transaction.
 (exe:2154): Gdk-WARNING **: XID collision, trouble ahead
 (nautilus:1619): GConf-CRITICAL **: gconf_value_free: assertion `value != NULL' failed
 (nautilus:1619): GConf-CRITICAL **: gconf_value_free: assertion `value != NULL' failed
dmi.bios.date: 11/15/2005
dmi.bios.vendor: Phoenix Technologies, LTD
dmi.bios.version: 3.13
dmi.board.name: Amberine M
dmi.board.vendor: ASUSTek Computer INC.
dmi.board.version: 1.03
dmi.chassis.type: 3
dmi.chassis.version: 1111
dmi.modalias: dmi:bvnPhoenixTechnologies,LTD:bvr3.13:bd11/15/2005:svnHPPavilion061:pnEL473AA-ABAa1357c:pvr0ny1114RE101AMBEM00:rvnASUSTekComputerINC.:rnAmberineM:rvr1.03:cvn:ct3:cvr1111:
dmi.product.name: EL473AA-ABA a1357c
dmi.product.version: 0ny1114RE101AMBEM00
dmi.sys.vendor: HP Pavilion 061
version.compiz: compiz 1:0.9.4+bzr20110415-0ubuntu1
version.libdrm2: libdrm2 2.4.23-1ubuntu6
version.libgl1-mesa-dri: libgl1-mesa-dri 7.10.2-0ubuntu1
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental 7.10.2-0ubuntu1
version.libgl1-mesa-glx: libgl1-mesa-glx 7.10.2-0ubuntu1
version.xserver-xorg: xserver-xorg 1:7.6+4ubuntu3
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
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:0.0.16+git20110107+b795ca6e-0ubuntu7

[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 #759791, 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.