unity-window-decorator crashed with SIGSEGV in gdk_window_get_events()

[Kotusev]

Binary package hint: compiz

why my desktop should access /var/log/dmesg?

ProblemType: Crash
DistroRelease: Ubuntu 11.04
Package: compiz-gnome 1:0.9.4git20110322-0ubuntu5
ProcVersionSignature: Ubuntu 2.6.38-7.39-generic 2.6.38
Uname: Linux 2.6.38-7-generic x86_64
Architecture: amd64
CrashCounter: 1
CurrentDmesg: Error: command ['sh', '-c', 'dmesg | comm -13 --nocheck-order /var/log/dmesg -'] failed with exit code 1: comm: /var/log/dmesg: Permission denied
DRM.card0.VGA.1:
 status: connected
 enabled: enabled
 dpms: On
 modes: 1280x1024 1280x1024 1280x1024 1280x1024 1280x1024 1152x864 1024x768 1024x768 1024x768 832x624 800x600 800x600 800x600 800x600 640x480 640x480 640x480 640x480 720x400 640x350
 edid-base64: AP///////wAJ0Th2qAAAAAQNAQNsIht46sr2o1dHniMRT1S/74BxT4GQgYCBiwEBAQEBAQEBvDQAmFEAKkAwcBMAUg4RAAAe1QmAoCBeYxAQYFIIMOQQAAAaAAAA/QA4Sx9RDgAKICAgICAgAAAA/ABGUCA3NjcKICAgICAgAMg=
Date: Sat Mar 26 17:27:50 2011
DistUpgraded: Log time: 2011-03-21 15:28:50.439315
DistroCodename: natty
DistroVariant: ubuntu
ExecutablePath: /usr/bin/unity-window-decorator
GraphicsCard: nVidia Corporation G73 [GeForce 7600 GT] [10de:0391] (rev a1) (prog-if 00 [VGA controller])
MachineType: Unknow Unknow
ProcCmdline: /usr/bin/unity-window-decorator
ProcEnviron:
 LANGUAGE=en_US:en
 LANG=en_US.utf8
 SHELL=/bin/bash
ProcKernelCmdLine: initrd=/initrd.img-2.6.38-7-generic root=UUID=e35222de-f5ce-49ba-92a6-e5f466942289 ro console=tty0 BOOT_IMAGE=/vmlinuz-2.6.38-7-generic
ProcVersionSignature_: Ubuntu 2.6.38-7.39-generic 2.6.38
SegvAnalysis:
 Segfault happened at: 0x7fa6d09764ce <gdk_window_get_events+14>: mov (%rbx),%rdx
 PC (0x7fa6d09764ce) ok
 source "(%rbx)" (0xffffffffb8012240) not located in a known VMA region (needed readable region)!
 destination "%rdx" ok
SegvReason: reading unknown VMA
Signal: 11
SourcePackage: compiz
StacktraceTop:
 gdk_window_get_events () from /usr/lib/libgdk-x11-2.0.so.0
 event_fusernameter_func ()
 ?? () from /usr/lib/libgdk-x11-2.0.so.0
 ?? () from /usr/lib/libgdk-x11-2.0.so.0
 ?? () from /usr/lib/libgdk-x11-2.0.so.0
Title: unity-window-decorator crashed with SIGSEGV in gdk_window_get_events()
UpgradeStatus: Upgraded to natty on 2011-03-21 (5 days ago)
UserGroups: sudo
dmi.bios.date: 02/01/2008
dmi.bios.vendor: Award Software International, Inc.
dmi.bios.version: F2
dmi.board.name: RS780-SB700
dmi.board.version: Unknox
dmi.chassis.type: 3
dmi.chassis.vendor: Unknow
dmi.chassis.version: Unknow
dmi.modalias: dmi:bvnAwardSoftwareInternational,Inc.:bvrF2:bd02/01/2008:svnUnknow:pnUnknow:pvrUnknow:rvn:rnRS780-SB700:rvrUnknox:cvnUnknow:ct3:cvrUnknow:
dmi.product.name: Unknow
dmi.product.version: Unknow
dmi.sys.vendor: Unknow
version.compiz: compiz 1:0.9.4git20110322-0ubuntu5
version.libdrm2: libdrm2 2.4.23-1ubuntu5
version.libgl1-mesa-glx: libgl1-mesa-glx 7.10.1-0ubuntu3
version.xserver-xorg: xserver-xorg 1:7.6~3ubuntu11
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:6.14.0-0ubuntu4
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.14.0-4ubuntu4
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:0.0.16+git20110107+b795ca6e-0ubuntu6

[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 #725284, 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.