unity-window-decorator crashed with SIGSEGV in event_filter_func()

[bjarkih]

Binary package hint: compiz

had just finished a session where i was logged in to gnome/ubuntu classic (got firestarter wizard for the first time since upgrade btw) where I was trying to install a package that didn't work on the new kernel. Logged out, logged in to ubuntu (new) and get the firestarter wizard agin, it had lost all it's settings from previous session. and when the wizard was running and I was trying to start firewall compiz gave me the crash message.

lsb_release -rd : Description:
Ubuntu Natty (development branch)
Release: 11.04
compiz:
  Installed: 1:0.9.4git20110322-0ubuntu5
  Candidate: 1:0.9.4git20110322-0ubuntu5
  Version table:
 *** 1:0.9.4git20110322-0ubuntu5 0
        500 http://is.archive.ubuntu.com/ubuntu/ natty/main i386 Packages
        100 /var/lib/dpkg/status

after crash, when window is not maximized I don't get the rezize/close/minimize buttons but the menus are still at the top of the screen. Also the top of the window has disapeared "under" the top taskbar.
Firestarter is frozen.

ProblemType: Crash
DistroRelease: Ubuntu 11.04
Package: compiz-gnome 1:0.9.4git20110322-0ubuntu5
ProcVersionSignature: Ubuntu 2.6.38-7.39-generic 2.6.38
Uname: Linux 2.6.38-7-generic i686
Architecture: i386
Date: Tue Apr 5 23:51:16 2011
DistroCodename: natty
DistroVariant: ubuntu
ExecutablePath: /usr/bin/unity-window-decorator
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Beta i386 (20110330)
InstallationMedia_: Ubuntu 11.04 "Natty Narwhal" - Beta i386 (20110330)
ProcCmdline: /usr/bin/unity-window-decorator
ProcEnviron:
 LANGUAGE=en_US:en
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcVersionSignature_: Ubuntu 2.6.38-7.39-generic 2.6.38
SegvAnalysis:
 Segfault happened at: 0x80584d9 <event_filter_func+649>: mov 0x224(%edx),%eax
 PC (0x080584d9) ok
 source "0x224(%edx)" (0x00000224) not located in a known VMA region (needed readable region)!
 destination "%eax" ok
SegvReason: reading NULL VMA
Signal: 11
SourcePackage: compiz
StacktraceTop:
 event_filter_func ()
 ?? () from /usr/lib/libgdk-x11-2.0.so.0
 ?? () from /usr/lib/libgdk-x11-2.0.so.0
 ?? () from /usr/lib/libgdk-x11-2.0.so.0
 g_main_context_dispatch () from /lib/i386-linux-gnu/libglib-2.0.so.0
Title: unity-window-decorator crashed with SIGSEGV in event_filter_func()
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare
XsessionErrors:
 (nautilus:8584): GConf-CRITICAL **: gconf_value_free: assertion `value != NULL' failed
 (<unknown>:8579): dee-WARNING **: Transaction from com.canonical.Unity.ApplicationsPlace.SectionsModel is in the past. Ignoring transaction.
 (<unknown>:8579): dee-WARNING **: Transaction from com.canonical.Unity.ApplicationsPlace.GroupsModel is in the past. Ignoring transaction.
 (<unknown>:8579): dee-WARNING **: Transaction from com.canonical.Unity.ApplicationsPlace.GlobalGroupsModel is in the past. Ignoring transaction.
 (<unknown>:8579): dee-WARNING **: Transaction from com.canonical.Unity.ApplicationsPlace.RunnerGroupsModel is in the past. Ignoring transaction.
version.libgl1-mesa-glx: libgl1-mesa-glx 7.10.1-0ubuntu3
version.xserver-xorg: xserver-xorg 1:7.6+4ubuntu1

[bjarkih (bjarkih1977)]

Restarted the computer and the same thing happened again.

[bjarkih (bjarkih1977)]

update: installed compizconfig-settings-manager and did a restart. No crash but I don't know if this is relevant since this package wasn't in the original setup and I asume not necessary. but the problem with the topless windows persists, see picture attached.

[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 #726101, 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.