compiz crashed with SIGSEGV in pthread_mutex_lock()

[paregistrase]

Binary package hint: compiz

Compiz crash after try to assign a fixed viewport for gmusicbrowser.
name=gmusicbrowser viewport X 1 viewport Y 2
The setting have not effect, gmusicbrowser continues opening in current viewport

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,compiztoolbox,decor,kde,regex,grid,move,animation,staticswitcher,snap,place,mousepoll,imgpng,expo,winrules,gnomecompat,resize,workarounds,session,wall,fade,mag,scale,unityshell]
CompositorRunning: compiz
CrashCounter: 1
DRM.card0.DVI.D.1:
 status: disconnected
 enabled: disabled
 dpms: Off
 modes:
 edid-base64:
DRM.card0.HDMI.A.1:
 status: connected
 enabled: enabled
 dpms: On
 modes: 1920x1080 1360x768 1280x720 1024x768 1024x768 1024x768 832x624 800x600 800x600 640x480 640x480 640x480 720x400
 edid-base64: AP///////wAebb91AQEBAQgRAQOARid46tmwo1dJnCURSUulbgAxQEVAYUDRwAEBAQEBAQEBAjqAGHE4LUBYLEUAxI4hAAAeGyFQoFEAHjBIiDUAvIYhAAAcAAAA/AAzMkxDNTYKICAgICAgAAAA/QAySxxDDwAKICAgICAgAfcCAyHxTgIRAQMSEwQUBSEfICIQIwkHB4MBAABlAwwAEAABHQC8UtAeILgoVUDEjiEAAB4BHQByUdAeIG4oVQDEjiEAAB4BHYDQchwWIBAsJYDEjiEAAJ6MCtCQIEAxIAxAVQDEjiEAABhOHwCAUQAeMECANwC8iCEAABgAAAAAzA==
DRM.card0.VGA.1:
 status: disconnected
 enabled: disabled
 dpms: Off
 modes:
 edid-base64:
Date: Wed Apr 13 06:18:47 2011
DistUpgraded: Fresh install
DistroCodename: natty
DistroVariant: ubuntu
ExecutablePath: /usr/bin/compiz
GraphicsCard:
 ATI Technologies Inc RS690 [Radeon X1200 Series] [1002:791e] (prog-if 00 [VGA controller])
   Subsystem: ASUSTeK Computer Inc. Device [1043:826d]
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Alpha i386 (20110301.7)
InstallationMedia_: Ubuntu 11.04 "Natty Narwhal" - Alpha i386 (20110301.7)
MachineType: System manufacturer System Product Name
ProcCmdline: compiz
ProcEnviron:
 LANGUAGE=es_ES:en
 LANG=es_ES.UTF-8
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.38-8-generic root=UUID=db85aef9-8a88-4b24-8e25-3d6ee7d27e6e ro quiet splash vt.handoff=7
ProcVersionSignature_: Ubuntu 2.6.38-8.42-generic 2.6.38.2
Renderer: Unknown
SegvAnalysis:
 Segfault happened at: 0x24133d <pthread_mutex_lock+29>: mov 0xc(%esi),%edi
 PC (0x0024133d) ok
 source "0xc(%esi)" (0x00000030) not located in a known VMA region (needed readable region)!
 destination "%edi" ok
SegvReason: reading NULL 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: No upgrade log present (probably fresh install)
UserGroups: adm admin audio cdrom dialout dip fax fuse lpadmin netdev plugdev sambashare video
dmi.bios.date: 02/13/2007
dmi.bios.vendor: Phoenix Technologies, LTD
dmi.bios.version: ASUS M2A-VM ACPI BIOS Revision 0202
dmi.board.name: M2A-VM
dmi.board.vendor: ASUSTeK Computer INC.
dmi.board.version: 1.XX
dmi.chassis.asset.tag: 123456789000
dmi.chassis.type: 3
dmi.chassis.vendor: Chassis Manufacture
dmi.chassis.version: Chassis Version
dmi.modalias: dmi:bvnPhoenixTechnologies,LTD:bvrASUSM2A-VMACPIBIOSRevision0202:bd02/13/2007:svnSystemmanufacturer:pnSystemProductName:pvrSystemVersion:rvnASUSTeKComputerINC.:rnM2A-VM:rvr1.XX:cvnChassisManufacture:ct3:cvrChassisVersion:
dmi.product.name: System Product Name
dmi.product.version: System Version
dmi.sys.vendor: System manufacturer
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.