Alt-tab switcher extremely slow under CPU load

[Chris Halse Rogers]

Under system load (something hammering the CPUs at 100%) the time taken for the alt-tab switcher to popup is extreme - sometimes upwards of 10s.

Chris Coulson also reports this behaviour; for him it occurs when something goes crazy and spams DBus.

ProblemType: Bug
DistroRelease: Ubuntu 11.10
Package: compiz 1:0.9.5.0-0ubuntu1
ProcVersionSignature: Ubuntu 3.0.0-5.6-generic 3.0.0-rc7
Uname: Linux 3.0.0-5-generic x86_64
Architecture: amd64
CompizPlugins: [core,bailer,detection,composite,opengl,compiztoolbox,decor,gnomecompat,grid,imgpng,move,regex,resize,animation,expo,mousepoll,snap,vpswitch,wall,workarounds,unitymtgrabhandles,unitydialog,place,ezoom,session,staticswitcher,fade,scale,unityshell]
CompositorRunning: compiz
CurrentDmesg: Error: command ['sh', '-c', 'dmesg | comm -13 --nocheck-order /var/log/dmesg -'] failed with exit code 1: comm: /var/log/dmesg: Permission denied
Date: Wed Jul 20 09:56:56 2011
DistUpgraded: Log time: 2011-07-16 17:44:22.551122
DistroCodename: oneiric
DistroVariant: ubuntu
EcryptfsInUse: Yes
GraphicsCard:
 Intel Corporation Mobile 4 Series Chipset Integrated Graphics Controller [8086:2a42] (rev 07) (prog-if 00 [VGA controller])
   Subsystem: Lenovo Device [17aa:20e4]
   Subsystem: Lenovo Device [17aa:20e4]
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Alpha amd64 (20110714)
MachineType: LENOVO 7465CTO
PackageArchitecture: all
ProcEnviron:
 LANGUAGE=en_AU:en
 PATH=(custom, user)
 LANG=en_AU.UTF-8
 SHELL=/bin/zsh
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.0.0-5-generic root=UUID=213be05f-2cdc-4b67-b358-e43876718221 ro rootflags=subvol=@ quiet splash video=LVDS-1:d vt.handoff=7
Renderer: Unknown
SourcePackage: compiz
UpgradeStatus: Upgraded to oneiric on 2011-07-16 (3 days ago)
dmi.bios.date: 03/10/2010
dmi.bios.vendor: LENOVO
dmi.bios.version: 6DET63WW (3.13 )
dmi.board.name: 7465CTO
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:bvr6DET63WW(3.13):bd03/10/2010:svnLENOVO:pn7465CTO:pvrThinkPadX200s:rvnLENOVO:rn7465CTO:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.name: 7465CTO
dmi.product.version: ThinkPad X200s
dmi.sys.vendor: LENOVO
version.compiz: compiz 1:0.9.5.0-0ubuntu1
version.ia32-libs: ia32-libs 20090808ubuntu13
version.libdrm2: libdrm2 2.4.26-1ubuntu1
version.libgl1-mesa-dri: libgl1-mesa-dri 7.11~1-0ubuntu3
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental 7.11~1-0ubuntu3
version.libgl1-mesa-glx: libgl1-mesa-glx 7.11~1-0ubuntu3
version.xserver-xorg: xserver-xorg 1:7.6+7ubuntu3
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.6.0-1ubuntu13
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:6.14.2-1ubuntu2
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.15.0-3ubuntu2
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:0.0.16+git20110411+8378443-1

[jhfhlkjlj (fdsuufijjejejejej-deactivatedaccount)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. We are sorry that we do not always have the capacity to look at all reported bugs in a timely manner. There have been many changes in Ubuntu since that time you reported the bug and your problem may have been fixed with some of the updates. It would help us a lot if you could test it on a currently supported Ubuntu version. When you test it and it is still an issue, kindly upload the updated logs by running apport-collect <bug #> and any other logs that are relevant for this particular issue.

11.10 is near the end-of-life and hopefully this issue has been resolved in 12.04. Please test and report back if it still exists.

[Launchpad Janitor (janitor)]

[Expired for compiz (Ubuntu) because there has been no activity for 60 days.]