compiz crashed with SIGSEGV in pthread_mutex_lock()

[Augusto]

Binary package hint: compiz

I had a few windows open: Firefox, evolution, evince, libreoffice and terminal. Then the launcher refused to hide as in bug #732438 so I issued Alt+F2 unity --replace. That brought back unity although the panel didn't redraw. Tired of the autohide issues decided to disable autohiding using ccsm. At that point disabled an accessibility plugin that I didn't need. The panel was redrawn but soon after compiz crashed leaving me without launcher, panel, or window decorations. thx

ProblemType: Crash
DistroRelease: Ubuntu 11.04
Package: compiz-core 1:0.9.4+bzr20110411-0ubuntu1
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,decor,mousepoll,expo,imgpng,regex,scale,vpswitch,place,move,snap,compiztoolbox,workarounds,unitymtgrabhandles,wall,gnomecompat,grid,resize,session,staticswitcher,unityshell]
CompositorRunning: compiz
DRM.card0.DP.1:
 status: disconnected
 enabled: disabled
 dpms: Off
 modes:
 edid-base64:
DRM.card0.LVDS.1:
 status: connected
 enabled: enabled
 dpms: Off
 modes: 1366x768 1366x768
 edid-base64: AP///////wAGrywRAAAAAAESAQOQHRB4CvnVlVVUkychUFQAAAABAQEBAQEBAQEBAQEBAQEBEhtWWlAAGTAwIDYAJaQQAAAaDBJWWlAAGTAwIDYAJaQQAAAaAAAA/gBYWDMxR4BCMTMzWFcxAAAAAAAAAAAAAAAAAAEBCiAgAHY=
DRM.card0.VGA.1:
 status: connected
 enabled: enabled
 dpms: On
 modes: 1920x1200 1920x1080 1600x1200 1280x1024 1280x1024 1280x1024 1152x921 1152x864 1024x768 1024x768 1024x768 832x624 800x600 800x600 800x600 800x600 640x480 640x480 640x480 640x480 720x400
 edid-base64: AP///////wBOroYFMDAwMBgOAQMMMyCW6hoIolpLmCQVUVm/74DRANHAgYCBkKlAcYYBAQEBEDuAiHCwIkAIQCQABkQhAAAeyjWAiHA4IEAIQCQABkQhAAAeMCoAmFEAKkAwcBMABkQhAAAYrjNAsGCwJ0AIQFoABkQhAAAeACg=
Date: Wed Apr 13 12:25:39 2011
DistUpgraded: Fresh install
DistroCodename: natty
DistroVariant: ubuntu
EcryptfsInUse: Yes
ExecutablePath: /usr/bin/compiz
GraphicsCard:
 Intel Corporation Mobile 4 Series Chipset Integrated Graphics Controller [8086:2a42] (rev 07) (prog-if 00 [VGA controller])
   Subsystem: Dell Device [1028:0432]
   Subsystem: Dell Device [1028:0432]
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Beta i386 (20110330)
InstallationMedia_: Ubuntu 11.04 "Natty Narwhal" - Beta i386 (20110330)
MachineType: Dell Inc. Latitude 13
ProcCmdline: compiz
ProcEnviron:
 LANGUAGE=en_GB:en
 LANG=en_GB.UTF-8
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.38-8-generic root=UUID=f5834f17-4735-4c38-92a1-d7a382dcc3be ro quiet splash vt.handoff=7
ProcVersionSignature_: Ubuntu 2.6.38-8.42-generic 2.6.38.2
Renderer: Unknown
SegvAnalysis:
 Segfault happened at: 0x353367 <pthread_mutex_lock+71>: lock cmpxchg %ecx,(%esi)
 PC (0x00353367) ok
 source "%ecx" ok
 destination "(%esi)" (0x0095cb54) in non-writable VMA region: 0x0095c000-0x0095d000 r--p /usr/lib/compiz/libresize.so
SegvReason: writing VMA /usr/lib/compiz/libresize.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: No upgrade log present (probably fresh install)
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare
dmi.bios.date: 08/03/2010
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A01
dmi.board.name: 067KDW
dmi.board.vendor: Dell Inc.
dmi.chassis.type: 8
dmi.chassis.vendor: Dell Inc.
dmi.modalias: dmi:bvnDellInc.:bvrA01:bd08/03/2010:svnDellInc.:pnLatitude13:pvr:rvnDellInc.:rn067KDW:rvr:cvnDellInc.:ct8:cvr:
dmi.product.name: Latitude 13
dmi.sys.vendor: Dell Inc.
version.compiz: compiz 1:0.9.4+bzr20110411-0ubuntu1
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 N/A
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 #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.