Hi, I'm able to reproduce this crash by using "Shaded windows" (that don't work properly on Trusty anyway. See: https://bugs.launchpad.net/ubuntu/+source/unity/+bug/1322808), with the following instructions:
1. Log into a fresh new user, running Unity 2. Press Windows key, start unity-tweak-tool 3. Select Window Manager/Additional settings 4. Set Title Bar Actions/Double Click to "Toggle Shade" 5. Start a terminal 6. In the terminal, 'pgrep compiz' to get the current PID 7. Double click on titlebar to shade it; window will become "ghosted" 8. Press Alt-Tab to switch windows; keep holding down Alt and press Tab until the terminal window is selected 9. Release Alt. 10. Compiz crashes and takes a while to restart. Repeat 'pgrep compiz' to see new PID for compiz -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to unity in Ubuntu. https://bugs.launchpad.net/bugs/1274438 Title: compiz crashed with SIGSEGV in unity::switcher::Controller::Impl::GetCurrentSelection() Status in Unity: New Status in “unity” package in Ubuntu: Confirmed Bug description: The switcher hung and then this crash occurred. ProblemType: Crash DistroRelease: Ubuntu 14.04 Package: unity 7.1.2+14.04.20131106.1-0ubuntu2 ProcVersionSignature: Ubuntu 3.13.0-5.20-generic 3.13.0 Uname: Linux 3.13.0-5-generic x86_64 ApportVersion: 2.13.2-0ubuntu2 Architecture: amd64 CurrentDesktop: Unity Date: Thu Jan 30 09:30:55 2014 EcryptfsInUse: Yes ExecutablePath: /usr/bin/compiz InstallationDate: Installed on 2013-12-06 (54 days ago) InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Release amd64 (20131016.1) ProcCmdline: compiz SegvAnalysis: Segfault happened at: 0x7f07f56b85f3 <_ZNK5unity8switcher10Controller4Impl19GetCurrentSelectionEv+323>: mov (%rdi),%rbp PC (0x7f07f56b85f3) ok source "(%rdi)" (0x00000000) not located in a known VMA region (needed readable region)! destination "%rbp" ok SegvReason: reading NULL VMA Signal: 11 SourcePackage: unity StacktraceTop: unity::switcher::Controller::Impl::GetCurrentSelection() const () from /usr/lib/compiz/libunityshell.so unity::switcher::Controller::Impl::Hide(bool) () from /usr/lib/compiz/libunityshell.so unity::UnityScreen::altTabTerminateCommon(CompAction*, unsigned int, std::vector<CompOption, std::allocator<CompOption> >&) () from /usr/lib/compiz/libunityshell.so compiz::private_screen::EventManager::triggerRelease(CompAction*, unsigned int, std::vector<CompOption, std::allocator<CompOption> >&) () from /usr/lib/libcompiz_core.so.ABI-20130415 PrivateScreen::triggerStateNotifyBindings(std::vector<CompOption, std::allocator<CompOption> >&, _XkbStateNotifyEvent*, std::vector<CompOption, std::allocator<CompOption> >&) () from /usr/lib/libcompiz_core.so.ABI-20130415 Title: compiz crashed with SIGSEGV in unity::switcher::Controller::Impl::GetCurrentSelection() UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: adm autopilot cdrom dip fuse lpadmin plugdev sambashare sbuild sudo To manage notifications about this bug go to: https://bugs.launchpad.net/unity/+bug/1274438/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
