compiz crashed with SIGSEGV in pthread_mutex_lock()

[PresuntoRJ]

Binary package hint: compiz

kbisNotWorking...had2CopyAndPasteThisLetterByLetter...mayBeRelated

ProblemType: Crash
DistroRelease: Ubuntu 11.04
Package: compiz-core 1:0.9.4+bzr20110407-0ubuntu2
ProcVersionSignature: Ubuntu 2.6.38-8.41-generic-pae 2.6.38.2
Uname: Linux 2.6.38-8-generic-pae i686
Architecture: i386
CompizPlugins: [core,bailer,detection,composite,opengl,decor,mousepoll,vpswitch,regex,animation,snap,expo,move,compiztoolbox,place,grid,imgpng,gnomecompat,wall,ezoom,workarounds,staticswitcher,resize,fade,unitymtgrabhandles,scale,session,unityshell]
CompositorRunning: compiz
DRM.card0.LVDS.1:
 status: connected
 enabled: enabled
 dpms: On
 modes: 1280x800
 edid-base64: AP///////wBMozM2AAAAAAAPAQOAIRV4Cof1lFdPjCcnUFQAAAABAQEBAQEBAQEBAQEBAQEB7hoAgFAgEDAQMBMAS88QAAAZAAAADwAAAAAAAAAAACOHAmQCAAAA/gBTQU1TVU5HCiAgICAgAAAA/gBMVE4xNTRYMy1MMDYKAHA=
DRM.card0.VGA.1:
 status: disconnected
 enabled: disabled
 dpms: Off
 modes:
 edid-base64:
Date: Sun Apr 10 01:36:45 2011
DistUpgraded: Log time: 2011-04-09 18:13:48.268164
DistroCodename: natty
DistroVariant: ubuntu
DkmsStatus: virtualbox-ose, 4.0.4, 2.6.38-8-generic, i686: installed
EcryptfsInUse: Yes
ExecutablePath: /usr/bin/compiz
GraphicsCard:
 Intel Corporation Mobile GM965/GL960 Integrated Graphics Controller (primary) [8086:2a02] (rev 0c) (prog-if 00 [VGA controller])
   Subsystem: Lenovo Device [17aa:383e]
   Subsystem: Lenovo Device [17aa:383e]
InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release i386 (20101007)
InstallationMedia_: Ubuntu 10.10 "Maverick Meerkat" - Release i386 (20101007)
MachineType: LENOVO 0769AAP
ProcCmdline: compiz
ProcEnviron:
 LANGUAGE=pt_BR:en
 LANG=en_US.UTF-8
 LC_MESSAGES=pt_BR.UTF-8
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.38-8-generic-pae root=UUID=4b092518-b996-429c-b41e-9bf39183163c ro quiet splash vt.handoff=7
ProcVersionSignature_: Ubuntu 2.6.38-8.41-generic-pae 2.6.38.2
Renderer: Unknown
SegvAnalysis:
 Segfault happened at: 0xb7194367 <pthread_mutex_lock+71>: lock cmpxchg %ecx,(%esi)
 PC (0xb7194367) ok
 source "%ecx" ok
 destination "(%esi)" (0xb4cf9adc) in non-writable VMA region: 0xb4cf9000-0xb4cfa000 r--p /usr/lib/compiz/libscale.so
SegvReason: writing VMA /usr/lib/compiz/libscale.so
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 2011-04-10 (0 days ago)
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare
dmi.bios.date: 06/11/2008
dmi.bios.vendor: LENOVO
dmi.bios.version: 68ET37WW
dmi.board.name: IEL10
dmi.board.vendor: LENOVO
dmi.board.version: REFERENCE
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: No Enclosure
dmi.chassis.version: N/A
dmi.modalias: dmi:bvnLENOVO:bvr68ET37WW:bd06/11/2008:svnLENOVO:pn0769AAP:pvr3000N200:rvnLENOVO:rnIEL10:rvrREFERENCE:cvnNoEnclosure:ct10:cvrN/A:
dmi.product.name: 0769AAP
dmi.product.version: 3000 N200
dmi.sys.vendor: LENOVO
version.compiz: compiz 1:0.9.4+bzr20110407-0ubuntu2
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 #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.