This bug is reproducible on the open source Radeon driver with integrated Radeon HD3200. Stock Ubuntu 14.04 fully updated. The only manual change was changing the order of plugins to load expo after unity (so hotcorners would work reliably).
Steps to reproduce: 1. Open several instances of a single application (e.g. terminal) 2. Click on the icon for that application in the unity launcher 3. Compiz segfaults and X crashes. Here are the segfault entries in dmesg from the few times I did it: [ 6271.667171] compiz[2431]: segfault at 48 ip 00007f076dfdc840 sp 00007ffcbc8e4228 error 4 in libscale.so[7f076dfcb000+27000] [ 6423.258754] compiz[4949]: segfault at 48 ip 00007f46c4b5f840 sp 00007ffdec1c53e8 error 4 in libscale.so[7f46c4b4e000+27000] [ 6440.079751] compiz[5955]: segfault at 48 ip 00007f209a42a840 sp 00007ffe7582a3c8 error 4 in libscale.so[7f209a419000+27000] uname -a Linux zinnia 3.16.0-45-generic #60~14.04.1-Ubuntu SMP Fri Jul 24 21:16:23 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux And the output from glxinfo | grep OpenGL: OpenGL vendor string: X.Org OpenGL renderer string: Gallium 0.4 on AMD RS880 OpenGL core profile version string: 3.3 (Core Profile) Mesa 10.3.2 OpenGL core profile shading language version string: 3.30 OpenGL core profile context flags: (none) OpenGL core profile profile mask: core profile OpenGL core profile extensions: OpenGL version string: 3.0 Mesa 10.3.2 OpenGL shading language version string: 1.30 Let me know if any more information is required. -- 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/1284898 Title: compiz crashed with SIGSEGV in ScaleScreen::getSelectedWindow() Status in Unity: Confirmed Status in unity package in Ubuntu: Confirmed Bug description: crashed when pressing super + w and trying to select a window ProblemType: Crash DistroRelease: Ubuntu 14.04 Package: unity 7.1.2+14.04.20140220-0ubuntu1 ProcVersionSignature: Ubuntu 3.13.0-12.32-generic 3.13.4 Uname: Linux 3.13.0-12-generic x86_64 ApportVersion: 2.13.2-0ubuntu5 Architecture: amd64 CurrentDesktop: Unity Date: Tue Feb 25 18:17:20 2014 ExecutablePath: /usr/bin/compiz InstallationDate: Installed on 2014-02-25 (0 days ago) InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Alpha amd64 (20140223) ProcCmdline: compiz ProcEnviron: LANGUAGE=en_US PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=en_US.UTF-8 SHELL=/bin/bash SegvAnalysis: Segfault happened at: 0x7f1d2b6410c0 <_ZNK11ScaleScreen17getSelectedWindowEv>: mov 0x48(%rdi),%rax PC (0x7f1d2b6410c0) ok source "0x48(%rdi)" (0x00000048) not located in a known VMA region (needed readable region)! destination "%rax" ok SegvReason: reading NULL VMA Signal: 11 SourcePackage: unity StacktraceTop: ScaleScreen::getSelectedWindow() const () from /usr/lib/compiz/libscale.so unity::UnityScreen::handleEvent(_XEvent*) () from /usr/lib/compiz/libunityshell.so CompScreen::handleEvent(_XEvent*) () from /usr/lib/libcompiz_core.so.ABI-20140123 PrivateScaleScreen::handleEvent(_XEvent*) () from /usr/lib/compiz/libscale.so CompScreen::handleEvent(_XEvent*) () from /usr/lib/libcompiz_core.so.ABI-20140123 Title: compiz crashed with SIGSEGV in ScaleScreen::getSelectedWindow() UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo To manage notifications about this bug go to: https://bugs.launchpad.net/unity/+bug/1284898/+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
