compiz crashed with SIGSEGV in __pthread_mutex_lock()

[Matthias Andree]

Binary package hint: compiz

This SIGSEGV occurred as I ran "icewm --replace" from a gnome-terminal, with Unity running (as started through a regular Ubuntu login in a fully-updated Natty beta from gdm).

ProblemType: Crash
DistroRelease: Ubuntu 11.04
Package: compiz-core 1:0.9.4+bzr20110415-0ubuntu2
ProcVersionSignature: Ubuntu 2.6.38-8.42-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.VGA.1:
 status: connected
 enabled: enabled
 dpms: On
 modes: 1024x768 1024x768 1024x768 1024x768 800x600 800x600 800x600 800x600 640x480 640x480 640x480 640x480 720x400
 edid-base64: AP///////wBMLRcANTFHRwkNAQMIHhey6v9ZmVVNlyYbS0+vzgAxT0VPYU8xQAEBAQEBAQEBZBkAQEEAJjAYiDYAMOQQAAAYAAAA/QA4Sx48CAAKICAgICAgAAAA/ABTeW5jTWFzdGVyCiAgAAAA/wBISkZXMjMyMjI2CiAgAMY=
Date: Fri Apr 22 15:58:40 2011
DistUpgraded: Fresh install
DistroCodename: natty
DistroVariant: ubuntu
ExecutablePath: /usr/bin/compiz
GraphicsCard:
 Intel Corporation 82915G/GV/910GL Integrated Graphics Controller [8086:2582] (rev 0e) (prog-if 00 [VGA controller])
   Subsystem: Micro-Star International Co., Ltd. Device [1462:1370]
 Matrox Graphics, Inc. MGA G400/G450 [102b:0525] (rev 85) (prog-if 00 [VGA controller])
   Subsystem: Matrox Graphics, Inc. Millennium G450 32Mb Dual Head PCI [102b:0d43]
MachineType: To Be Filled By O.E.M. MS-7137
PlymouthDebug: Error: [Errno 13] Keine Berechtigung: '/var/log/plymouth-debug.log'
ProcCmdline: compiz
ProcEnviron:
 LANGUAGE=de_DE:en
 LANG=de_DE.UTF-8
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-2.6.38-8-generic-pae root=/dev/mapper/vgcrypt-root ro video=intelfb splash vt.handoff=7 acpi=debug verbose debug
ProcVersionSignature_: Ubuntu 2.6.38-8.42-generic-pae 2.6.38.2
Renderer: Unknown
SegvAnalysis:
 Segfault happened at: 0xb724d33d <__pthread_mutex_lock+29>: mov 0xc(%esi),%edi
 PC (0xb724d33d) ok
 source "0xc(%esi)" (0x0100010f) 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 (mutex=0x1000103) at pthread_mutex_lock.c:50
 ?? () 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
XsessionErrors:
 (nautilus:1607): GConf-CRITICAL **: gconf_value_free: assertion `value != NULL' failed
 (<unknown>:1596): dee-WARNING **: Transaction from com.canonical.Unity.ApplicationsPlace.SectionsModel is in the past. Ignoring transaction.
 (<unknown>:1596): dee-WARNING **: Transaction from com.canonical.Unity.ApplicationsPlace.GroupsModel is in the past. Ignoring transaction.
dmi.bios.date: 02/16/2006
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: V1.0Bc
dmi.board.asset.tag: To Be Filled By O.E.M.
dmi.board.name: MS-7137
dmi.board.vendor: MSI
dmi.board.version: 0A
dmi.chassis.asset.tag: To Be Filled By O.E.M.
dmi.chassis.type: 3
dmi.chassis.vendor: To Be Filled By O.E.M.
dmi.chassis.version: To Be Filled By O.E.M.
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrV1.0Bc:bd02/16/2006:svnToBeFilledByO.E.M.:pnMS-7137:pvr0A:rvnMSI:rnMS-7137:rvr0A:cvnToBeFilledByO.E.M.:ct3:cvrToBeFilledByO.E.M.:
dmi.product.name: MS-7137
dmi.product.version: 0A
dmi.sys.vendor: To Be Filled By O.E.M.
version.compiz: compiz 1:0.9.4+bzr20110415-0ubuntu2
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
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
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau N/A

[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.