compiz crashed with SIGSEGV in g_source_unref()

[Thad-daddyslick]

Binary package hint: compiz

Similar to multiple other bug reports with same name, but running radeon package for OpenGL.

Occurred immediately when I ran unity --replace. (Unity did not run at login & had to be invoked from command line.)

ProblemType: Crash
DistroRelease: Ubuntu 11.04
Package: compiz-core 1:0.9.4git20110322-0ubuntu5
ProcVersionSignature: Ubuntu 2.6.38-7.39-generic 2.6.38
Uname: Linux 2.6.38-7-generic x86_64
Architecture: amd64
CompizPlugins: [core,bailer,detection,composite,opengl,decor,mousepoll,move,compiztoolbox,snap,regex,place,imgpng,vpswitch,grid,gnomecompat,resize,animation,wall,session,expo,workarounds,ezoom,staticswitcher,fade,scale,unityshell]
CompositorRunning: compiz
CrashCounter: 1
DRM.card0.DIN.1:
 status: disconnected
 enabled: disabled
 dpms: On
 modes:
 edid-base64:
Date: Sat Mar 26 17:40:07 2011
DistUpgraded: Log time: 2011-03-20 16:03:09.950051
DistroCodename: natty
DistroVariant: ubuntu
ExecutablePath: /usr/bin/compiz
GraphicsCard:
 ATI Technologies Inc RV630 [Radeon HD 2600XT] [1002:9588] (prog-if 00 [VGA controller])
   Subsystem: Apple Computer Inc. Device [106b:00a6]
MachineType: Apple Computer, Inc. MacPro1,1
ProcCmdline: compiz
ProcEnviron:
 SHELL=/bin/bash
 PATH=(custom, user)
 LANG=en_US.UTF-8
ProcKernelCmdLine: root=UUID=3976d1f5-f0ff-4df6-a897-c0142a416078 ro quiet splash
ProcVersionSignature_: Ubuntu 2.6.38-7.39-generic 2.6.38
Renderer: Unknown
SegvAnalysis:
 Segfault happened at: 0x7f039b5f5f45 <g_source_unref+5>: mov 0x20(%rdi),%rsi
 PC (0x7f039b5f5f45) ok
 source "0x20(%rdi)" (0x0000001f) not located in a known VMA region (needed readable region)!
 destination "%rsi" ok
SegvReason: reading NULL VMA
Signal: 11
SourcePackage: compiz
StacktraceTop:
 g_source_unref () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
 PrivateScreen::~PrivateScreen() ()
 PrivateScreen::~PrivateScreen() ()
 CompScreen::~CompScreen() ()
 CompScreen::~CompScreen() ()
Title: compiz crashed with SIGSEGV in g_source_unref()
UpgradeStatus: Upgraded to natty on 2011-03-20 (6 days ago)
UserGroups: adm admin audio cdrom dialout dip floppy lpadmin netdev plugdev powerdev sambashare scanner video
XsessionErrors:
 (gnome-power-manager:1969): Gtk-WARNING **: Failed to load type module: (null)
 (gnome-power-manager:1969): Gtk-WARNING **: Failed to load type module: (null)
 (nm-applet:2104): GdkPixbuf-CRITICAL **: gdk_pixbuf_composite: assertion `dest_y >= 0 && dest_y + dest_height <= dest->height' failed
dmi.bios.date: 07/02/07
dmi.bios.vendor: Apple Computer, Inc.
dmi.bios.version: MP11.88Z.005C.B08.0707021221
dmi.board.asset.tag: Base Board Asset Tag#
dmi.board.name: Mac-F4208DC8
dmi.board.vendor: Apple Computer, Inc.
dmi.board.version: PVT
dmi.chassis.asset.tag: Asset Tag#
dmi.chassis.type: 2
dmi.chassis.vendor: Apple Computer, Inc.
dmi.chassis.version: Mac-F4208DC8
dmi.modalias: dmi:bvnAppleComputer,Inc.:bvrMP11.88Z.005C.B08.0707021221:bd07/02/07:svnAppleComputer,Inc.:pnMacPro1,1:pvr1.0:rvnAppleComputer,Inc.:rnMac-F4208DC8:rvrPVT:cvnAppleComputer,Inc.:ct2:cvrMac-F4208DC8:
dmi.product.name: MacPro1,1
dmi.product.version: 1.0
dmi.sys.vendor: Apple Computer, Inc.
version.compiz: compiz 1:0.9.4git20110322-0ubuntu5
version.libdrm2: libdrm2 2.4.23-1ubuntu5
version.libgl1-mesa-glx: libgl1-mesa-glx 7.10.1-0ubuntu3
version.xserver-xorg: xserver-xorg 1:7.6~3ubuntu11
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:6.14.0-0ubuntu4
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.14.0-4ubuntu4
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 #740897, 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.