Right after restart, if I use the Alt+Tab combination, unity/compiz crashes and reloads.
Most of the time it crashes again, if I use the switch (after a previous crash), but sometimes it remains stable.
I have this bug since I did the last software update (unity package changes).
ProblemType: Crash
DistroRelease: Ubuntu 11.10
Package: unity 4.28.0-0ubuntu1
ProcVersionSignature: Ubuntu 3.0.0-15.25-generic 3.0.13
Uname: Linux 3.0.0-15-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 1.23-0ubuntu4
Architecture: amd64
Date: Thu Jan 19 09:13:05 2012
ExecutablePath: /usr/bin/compiz
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111012)
ProcCmdline: compiz
ProcEnviron:
LANGUAGE=de_AT:de
PATH=(custom, user)
LANG=de_AT.UTF-8
SHELL=/bin/bash
SegvAnalysis:
Segfault happened at: 0x7f8dc08172f5 <_ZN5unity8switcher18SwitcherController28CompareSwitcherItemsPriorityEP20AbstractLauncherIconS3_+37>: mov 0x0(%rbp),%rax
PC (0x7f8dc08172f5) ok
source "0x0(%rbp)" (0x00132461) not located in a known VMA region (needed readable region)!
destination "%rax" ok
SegvReason: reading unknown VMA
Signal: 11
SourcePackage: unity
StacktraceTop:
unity::switcher::SwitcherController::CompareSwitcherItemsPriority(AbstractLauncherIcon*, AbstractLauncherIcon*) () from /usr/lib/compiz/libunityshell.so
void std::__insertion_sort<__gnu_cxx::__normal_iterator<AbstractLauncherIcon**, std::vector<AbstractLauncherIcon*, std::allocator<AbstractLauncherIcon*> > >, bool (*)(AbstractLauncherIcon*, AbstractLauncherIcon*)>(__gnu_cxx::__normal_iterator<AbstractLauncherIcon**, std::vector<AbstractLauncherIcon*, std::allocator<AbstractLauncherIcon*> > >, __gnu_cxx::__normal_iterator<AbstractLauncherIcon**, std::vector<AbstractLauncherIcon*, std::allocator<AbstractLauncherIcon*> > >, bool (*)(AbstractLauncherIcon*, AbstractLauncherIcon*)) () from /usr/lib/compiz/libunityshell.so
unity::switcher::SwitcherController::Show(unity::switcher::SwitcherController::ShowMode, unity::switcher::SwitcherController::SortMode, bool, std::vector<AbstractLauncherIcon*, std::allocator<AbstractLauncherIcon*> >) () from /usr/lib/compiz/libunityshell.so
UnityScreen::altTabInitiateCommon(CompAction*, unsigned int, std::vector<CompOption, std::allocator<CompOption> >&) () from /usr/lib/compiz/libunityshell.so
UnityScreen::altTabForwardInitiate(CompAction*, unsigned int, std::vector<CompOption, std::allocator<CompOption> >&) () from /usr/lib/compiz/libunityshell.so
Title: compiz crashed with SIGSEGV in unity::switcher::SwitcherController::CompareSwitcherItemsPriority()
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare
Thank you for taking the time to report this crash and helping to make this software better. This particular crash has already been reported and is a duplicate of bug #918121, 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.