compiz crashed with SIGSEGV in g_source_unref()

[Martin Pool]

Binary package hint: compiz

may be dupe of bug 740897?

ProblemType: Crash
DistroRelease: Ubuntu 11.04
Package: compiz-core 1:0.9.4git20110322-0ubuntu5
ProcVersionSignature: Ubuntu 2.6.38-8.41-generic 2.6.38.2
Uname: Linux 2.6.38-8-generic x86_64
Architecture: amd64
CompizPlugins: [core,bailer,detection,composite,opengl,decor,mousepoll,vpswitch,regex,animation,snap,expo,move,compiztoolbox,place,gnomecompat,wall,ezoom,workarounds,staticswitcher,resize,fade,scale,session,unityshell]
CompositorRunning: compiz
DRM.card0.DVI.D.1:
 status: connected
 enabled: enabled
 dpms: On
 modes: 1920x1200 1600x1200 1680x1050 1280x1024 1280x1024 1152x864 1024x768 1024x768 800x600 800x600 640x480 640x480 720x400
 edid-base64: AP///////wAQrDCgUzE0MBMTAQOAOiR46un1rFEwtCURUFSlSwCBgKlAcU+zAAEBAQEBAQEBKDyAoHCwI0AwIDYARmwhAAAaAAAA/wBSSzUxNDk1ODA0MVMKAAAA/ABERUxMIDI3MDlXCiAgAAAA/QA4TB5TEQAKICAgICAgAHU=
DRM.card0.VGA.1:
 status: disconnected
 enabled: disabled
 dpms: On
 modes:
 edid-base64:
Date: Wed Apr 6 13:51:41 2011
DistUpgraded: Log time: 2010-12-21 12:35:39.044742
DistroCodename: natty
DistroVariant: ubuntu
EcryptfsInUse: Yes
ExecutablePath: /usr/bin/compiz
GraphicsCard:
 ATI Technologies Inc RS880 [Radeon HD 4290] [1002:9714] (prog-if 00 [VGA controller])
   Subsystem: Giga-byte Technology Device [1458:d000]
MachineType: Gigabyte Technology Co., Ltd. GA-890GPA-UD3H
ProcCmdline: compiz
ProcEnviron:
 LANGUAGE=en_AU:en
 LANG=en_AU.UTF-8
 SHELL=/bin/zsh
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-2.6.38-8-generic root=/dev/mapper/vg_main-natty_64 ro clock=hpet quiet splash rootdelay=10 vt.handoff=7
ProcVersionSignature_: Ubuntu 2.6.38-8.41-generic 2.6.38.2
Renderer: Unknown
SegvAnalysis:
 Segfault happened at: 0x7f0587232f45 <g_source_unref+5>: mov 0x20(%rdi),%rsi
 PC (0x7f0587232f45) ok
 source "0x20(%rdi)" (0x100000021) not located in a known VMA region (needed readable region)!
 destination "%rsi" ok
SegvReason: reading unknown VMA
Signal: 11
SourcePackage: compiz
StacktraceTop:
 g_source_unref () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
 PrivateScreen::~PrivateScreen() ()
 PrivateScreen::~PrivateScreen() ()
 CompScreen::~CompScreen() ()
 CompScreen::~CompScreen() ()
Title: compiz crashed with SIGSEGV in g_source_unref()
UpgradeStatus: Upgraded to natty on 2010-12-21 (106 days ago)
UserGroups: adm admin audio cdrom dialout libvirtd lpadmin plugdev pulse pulse-access sambashare
XorgConf:
 Section "Device"
  Identifier "Configured Video Device"
  Option "SWCursor" "on"
 EndSection
dmi.bios.date: 05/04/2010
dmi.bios.vendor: Award Software International, Inc.
dmi.bios.version: F7c
dmi.board.name: GA-890GPA-UD3H
dmi.board.vendor: Gigabyte Technology Co., Ltd.
dmi.board.version: x.x
dmi.chassis.type: 3
dmi.chassis.vendor: Gigabyte Technology Co., Ltd.
dmi.modalias: dmi:bvnAwardSoftwareInternational,Inc.:bvrF7c:bd05/04/2010:svnGigabyteTechnologyCo.,Ltd.:pnGA-890GPA-UD3H:pvr:rvnGigabyteTechnologyCo.,Ltd.:rnGA-890GPA-UD3H:rvrx.x:cvnGigabyteTechnologyCo.,Ltd.:ct3:cvr:
dmi.product.name: GA-890GPA-UD3H
dmi.sys.vendor: Gigabyte Technology Co., Ltd.
version.compiz: compiz 1:0.9.4git20110322-0ubuntu5
version.ia32-libs: ia32-libs 20090808ubuntu11
version.libdrm2: libdrm2 2.4.23-1ubuntu6
version.libgl1-mesa-dri: libgl1-mesa-dri 7.10.1-0ubuntu3
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 7.10.1-0ubuntu3
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 2:2.14.0-4ubuntu6
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 #740897, 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.