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[Bug 1044060] [NEW] compiz uses 100% cpu seemingly at random but maybe related to update-notifier


Public bug reported:

Every once in a while, usually when I've been reading news and blogs for
a couple of hours, the display freezes up and doesn't respond to any
mouse clicking. Doing ctrl-alt-backspace works as well as ctrl-alt-f1.
I've noticed that if the problem happens a lot in a short period of
time, eventually update-notifier will tell me updates are available.
When I tried ctrl-alt-f1 and ran tops, that's when I discovered compiz
was using 100% cpu so that was what was causing the display to not
respond. I don't know many commands, but killall compiz did allow me to
continue reading the blog, but of course all window decoration was
missing and I had no way to launch other applications through the gui.
After doing ctrl-alt-backspace to restore my desktop, Apport reported an
update-notifier crash.

Since this problem happens at times I'm not doing anything but reading
what's already in the browser and trying to scroll down to read more, I
think the problem is caused by something done on a schedule. Since
update-notifier always seems to come up eventually on reboot or ctrl-
alt-backspace, it would seem like update-notifier is somehow causing
compiz to use 100% cpu at times.

ProblemType: Bug
DistroRelease: Ubuntu 12.10
Package: compiz 1:0.9.8+bzr3319-0ubuntu3
ProcVersionSignature: Ubuntu 3.5.0-13.14-generic 3.5.3
Uname: Linux 3.5.0-13-generic i686
ApportVersion: 2.5.1-0ubuntu3
Architecture: i386
CompizPlugins: [core,composite,opengl,compiztoolbox,decor,move,imgpng,obs,resize,grid,vpswitch,mousepoll,unitymtgrabhandles,snap,regex,wall,gnomecompat,place,animation,workarounds,expo,session,fade,ezoom,scale,unityshell]
Date: Thu Aug 30 15:32:19 2012
DistUpgraded: 2012-08-23 14:30:03,347 DEBUG enabling apt cron job
DistroCodename: quantal
DistroVariant: ubuntu
 NVIDIA Corporation C61 [GeForce 6150SE nForce 430] [10de:03d0] (rev a2) (prog-if 00 [VGA controller])
   Subsystem: ZOTAC International (MCO) Ltd. Device [19da:a127]
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release i386 (20111012)
 Bus 002 Device 002: ID 0451:2046 Texas Instruments, Inc. TUSB2046 Hub
 Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
 Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
 Bus 002 Device 003: ID 045e:0745 Microsoft Corp. Nano Transceiver v1.0 for Bluetooth
MachineType: Unknow Unknow
PackageArchitecture: all
 PATH=(custom, no user)
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.5.0-13-generic root=UUID=e92f6f09-fa78-4288-b695-6f763ae4e38d ro quiet splash vt.handoff=7
SourcePackage: compiz
UpgradeStatus: Upgraded to quantal on 2012-08-23 (7 days ago)
dmi.bios.date: 12/10/2009
dmi.bios.vendor: Phoenix Technologies, LTD
dmi.bios.version: 6.00 PG
dmi.board.name: NF-MCP61
dmi.board.vendor: nVIDIA
dmi.chassis.type: 3
dmi.chassis.vendor: nVIDIA
dmi.modalias: dmi:bvnPhoenixTechnologies,LTD:bvr6.00PG:bd12/10/2009:svnUnknow:pnUnknow:pvrUnknow:rvnnVIDIA:rnNF-MCP61:rvr:cvnnVIDIA:ct3:cvr:
dmi.product.name: Unknow
dmi.product.version: Unknow
dmi.sys.vendor: Unknow
version.compiz: compiz 1:0.9.8+bzr3319-0ubuntu3
version.libdrm2: libdrm2 2.4.38-0ubuntu2
version.libgl1-mesa-dri: libgl1-mesa-dri 9.0~git20120821.c1114c61-0ubuntu2
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 9.0~git20120821.c1114c61-0ubuntu2
version.xserver-xorg-core: xserver-xorg-core 2:
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.7.3-0ubuntu1
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:6.99.99~git20120713.6ef1ad6a-0ubuntu1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.20.3-0ubuntu1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.1-4~ubuntu1

** Affects: compiz (Ubuntu)
     Importance: Undecided
         Status: New

** Tags: apport-bug i386 quantal running-unity ubuntu

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  compiz uses 100% cpu seemingly at random but maybe related to update-

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