Public bug reported:
Description: Ubuntu 11.10
Release: 11.10
Unity: 4.28.0-0ubuntu1
60% of the time Unity crashes whilst using alt-tab. Found this in the
log viewer:
kernel: [ 73.464371] compiz[1961]: segfault at 3e1cb7bf ip b47710e7 sp
bfd04230 error 4 in libunityshell.so[b45ef000+20e000]
gnome-session[1885]: WARNING: Application 'compiz.desktop' killed by signal
gnome-session[1885]: WARNING: App 'compiz.desktop' respawning too quickly
gnome-session[1885]: CRITICAL: We failed, but the fail whale is dead. Sorry....
At that point Unity failed to restart, had to hard reset since all the panels /
window decorations were dead. Previous version of Unity and alt-tab did not
cause this behaviour.
Steps to reproduce:
1) Press alt-tab on a newly booted system
Expected results:
Alt-tab window switcher appears
Actual results:
Occasionally unity crashes. Sometime unrecoverably. Can not consistently
reproduce this. Happens about 60% of the time.
ProblemType: Bug
DistroRelease: Ubuntu 11.10
Package: unity 4.28.0-0ubuntu1
ProcVersionSignature: Ubuntu 3.0.0-15.25-generic-pae 3.0.13
Uname: Linux 3.0.0-15-generic-pae i686
.tmp.unity.support.test.0:
ApportVersion: 1.23-0ubuntu4
Architecture: i386
CompizPlugins:
[core,bailer,detection,composite,opengl,compiztoolbox,decor,place,imgpng,vpswitch,unitymtgrabhandles,session,grid,regex,resize,gnomecompat,move,mousepoll,animation,wall,workarounds,wobbly,expo,fade,ezoom,scale,unityshell]
CompositorRunning: compiz
Date: Tue Jan 17 09:27:45 2012
DistUpgraded: Log time: 2011-11-30 17:35:00.209305
DistroCodename: oneiric
DistroVariant: ubuntu
GraphicsCard:
Intel Corporation Core Processor Integrated Graphics Controller [8086:0046]
(rev 02) (prog-if 00 [VGA controller])
Subsystem: Lenovo Device [17aa:215a]
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release i386 (20110427.1)
Lsusb:
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 002: ID 8087:0020 Intel Corp. Integrated Rate Matching Hub
Bus 002 Device 002: ID 8087:0020 Intel Corp. Integrated Rate Matching Hub
MachineType: LENOVO 2522CT3
ProcEnviron:
LANGUAGE=en_GB:en
PATH=(custom, no user)
LANG=en_GB.UTF-8
SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.0.0-15-generic-pae
root=/dev/mapper/ubuntu-root ro quiet splash vt.handoff=7
SourcePackage: unity
UpgradeStatus: Upgraded to oneiric on 2011-11-30 (47 days ago)
dmi.bios.date: 10/25/2010
dmi.bios.vendor: LENOVO
dmi.bios.version: 6IET74WW (1.34 )
dmi.board.name: 2522CT3
dmi.board.vendor: LENOVO
dmi.board.version: Not Available
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Not Available
dmi.modalias:
dmi:bvnLENOVO:bvr6IET74WW(1.34):bd10/25/2010:svnLENOVO:pn2522CT3:pvrThinkPadT410:rvnLENOVO:rn2522CT3:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.name: 2522CT3
dmi.product.version: ThinkPad T410
dmi.sys.vendor: LENOVO
version.compiz: compiz 1:0.9.6+bzr20110929-0ubuntu6
version.libdrm2: libdrm2 2.4.26-1ubuntu1
version.libgl1-mesa-dri: libgl1-mesa-dri 7.11-0ubuntu3
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 7.11-0ubuntu3
version.xserver-xorg: xserver-xorg 1:7.6+7ubuntu7
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.6.0-1ubuntu13
version.xserver-xorg-video-ati: xserver-xorg-video-ati
1:6.14.99~git20110811.g93fc084-0ubuntu1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.15.901-1ubuntu2.1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau
1:0.0.16+git20110411+8378443-1
** Affects: unity (Ubuntu)
Importance: Undecided
Status: New
** Tags: apport-bug compiz-0.9 i386 needs-reassignment oneiric
regression-update running-unity ubuntu
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https://bugs.launchpad.net/bugs/917560
Title:
Alt-tab causes Unity to crash
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