compiz crashed with SIGSEGV in pthread_mutex_lock()

[Léa GRIS]

Crash always some minutes after session opening. Occurs witn classic or unity desktop. By the way I still have compiz up when this happens, it still crash in pthread_mutex_lock(). The apport crash then pop proposing a report. There are several opened bugs listed with variants of pthread_mutex_lock or __pthread_mutex_lock() I see but none of them seems in the same conditions. I wonder if by the way it is not all the same issue with variable symptoms. Please someone can look at the possible merging with other reports?

ProblemType: Crash
DistroRelease: Ubuntu 11.04
Package: compiz-core 1:0.9.4+bzr20110606-0ubuntu1~natty2
ProcVersionSignature: Ubuntu 2.6.38-10.46-generic 2.6.38.7
Uname: Linux 2.6.38-10-generic i686
Architecture: i386
CompizPlugins: [core,bailer,composite,opengl,decor,mousepoll,snap,gnomecompat,workarounds,grid,place,session,wall,compiztoolbox,imgpng,expo,vpswitch,copytex,resize,regex,move,thumbnail,debugspew,ezoom,unitymtgrabhandles,staticswitcher,fade,scale,unityshell]
CompositorRunning: compiz
CrashCounter: 1
CurrentDmesg:
 [ 43.577541] EXT4-fs (sda1): re-mounted. Opts: errors=remount-ro,commit=0
 [ 204.822883] show_signal_msg: 15 callbacks suppressed
 [ 204.822891] compiz[2229]: segfault at 360008f ip 0071f33d sp bfd22fd4 error 4 in libpthread-2.13.so[717000+15000]
 [ 261.272219] compiz[2591]: segfault at 17b ip 00e6e33d sp bfba2894 error 4 in libpthread-2.13.so[e66000+15000]
Date: Fri Jul 8 08:32:27 2011
DistUpgraded: Log time: 2010-10-12 10:24:37.694935
DistroCodename: natty
DistroVariant: ubuntu
ExecutablePath: /usr/bin/compiz
GraphicsCard:
 ATI Technologies Inc RV280 [Radeon 9200] [1002:5961] (rev 01) (prog-if 00 [VGA controller])
   Subsystem: C.P. Technology Co. Ltd Device [148c:2062]
   Subsystem: C.P. Technology Co. Ltd Device [148c:2063]
InstallationMedia: Ubuntu 10.04.1 LTS "Lucid Lynx" - Release i386 (20100816.1)
InstallationMedia_: Ubuntu 10.04.1 LTS "Lucid Lynx" - Release i386 (20100816.1)
Lsusb:
 Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
 Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
 Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
 Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
 Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
MachineType: Dell Computer Corporation OptiPlex GX270
ProcCmdline: /usr/bin/compiz
ProcEnviron:
 LANGUAGE=fr_FR:fr:en_GB:en
 PATH=(custom, user)
 LANG=fr_FR.UTF-8
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.38-10-generic root=UUID=1ef49b68-6946-49fa-b20c-0b4a1280e0c9 ro quiet splash vt.handoff=7
ProcVersionSignature_: Ubuntu 2.6.38-10.46-generic 2.6.38.7
Renderer: Unknown
SegvAnalysis:
 Segfault happened at: 0x71f33d <pthread_mutex_lock+29>: mov 0xc(%esi),%edi
 PC (0x0071f33d) ok
 source "0xc(%esi)" (0x0360008f) not located in a known VMA region (needed readable region)!
 destination "%edi" ok
SegvReason: reading unknown VMA
Signal: 11
SourcePackage: compiz
StacktraceTop:
 pthread_mutex_lock () from /lib/i386-linux-gnu/libpthread.so.0
 ?? () 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() ()
Title: compiz crashed with SIGSEGV in pthread_mutex_lock()
UpgradeStatus: Upgraded to natty on 2011-03-25 (104 days ago)
UserGroups: adm admin audio cdrom dialout dip fax floppy fuse lpadmin netdev plugdev powerdev sambashare tape video
dmi.bios.date: 05/17/2004
dmi.bios.vendor: Dell Computer Corporation
dmi.bios.version: A04
dmi.board.name: 0U1325
dmi.board.vendor: Dell Computer Corp.
dmi.chassis.type: 6
dmi.chassis.vendor: Dell Computer Corporation
dmi.modalias: dmi:bvnDellComputerCorporation:bvrA04:bd05/17/2004:svnDellComputerCorporation:pnOptiPlexGX270:pvr:rvnDellComputerCorp.:rn0U1325:rvr:cvnDellComputerCorporation:ct6:cvr:
dmi.product.name: OptiPlex GX270
dmi.sys.vendor: Dell Computer Corporation
version.compiz: compiz 1:0.9.4+bzr20110606-0ubuntu1~natty2
version.libdrm2: libdrm2 2.4.23-1ubuntu6
version.libgl1-mesa-dri: libgl1-mesa-dri 7.10.2-0ubuntu2
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 7.10.2-0ubuntu2
version.xserver-xorg: xserver-xorg 1:7.6+4ubuntu3.1
version.xserver-xorg-video-ati: xserver-xorg-video-ati N/A
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.14.0-4ubuntu7.1
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 #755127, 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.