I have been having problems with compiz using almost 100% on both cores. I finally narrowed it down to the DBUS plugin. You can cause the problem by starting Libreoffice writer with DBUS enabled. I am using Ubuntu Classic. It will hang on my machine and after that if you don't kill compiz (often both instances) they will use almost 100% of CPU on both cores.
Rob
ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: compiz 1:0.9.4+bzr20110606-0ubuntu1~natty2
ProcVersionSignature: Ubuntu 2.6.38-10.46-generic 2.6.38.7
Uname: Linux 2.6.38-10-generic i686
NonfreeKernelModules: nvidia
.proc.driver.nvidia.gpus.0: Error: [Errno 21] Is a directory: '/proc/driver/nvidia/gpus/0'
.proc.driver.nvidia.registry: Binary: ""
.proc.driver.nvidia.version:
NVRM version: NVIDIA UNIX x86 Kernel Module 270.41.06 Mon Apr 18 14:54:25 PDT 2011
GCC version: gcc version 4.5.2 (Ubuntu/Linaro 4.5.2-8ubuntu4)
Architecture: i386
CheckboxSubmission: b3f7c5231c874165f4d7945857608f87
CheckboxSystem: d00f84de8a555815fa1c4660280da308
CompizPlugins: [core,composite,opengl,compiztoolbox,maximumize,decor,move,resize,inotify,extrawm,place,scale,notification,grid,staticswitcher,gnomecompat,regex,put,session,winrules]
CompositorRunning: compiz
Date: Mon Aug 22 10:37:09 2011
DistUpgraded: Log time: 2011-04-13 15:33:36.309379
DistroCodename: natty
DistroVariant: ubuntu
GraphicsCard:
nVidia Corporation G84M [Quadro NVS 140M] [10de:0429] (rev a1) (prog-if 00 [VGA controller])
Subsystem: Dell Device [1028:01fe]
InstallationMedia: Ubuntu 9.10 "Karmic Koala" - Release i386 (20091028.5)
InstallationMedia_: Ubuntu 9.10 "Karmic Koala" - Release i386 (20091028.5)
JockeyStatus:
xorg:nvidia_173 - NVIDIA accelerated graphics driver (Proprietary, Disabled, Not in use)
xorg:nvidia_current - NVIDIA accelerated graphics driver (Proprietary, Enabled, Not in use)
MachineType: Dell Inc. Latitude D830
PackageArchitecture: all
PccardctlIdent:
Socket 0:
no product info available
PccardctlStatus:
Socket 0:
no card
ProcEnviron:
LANGUAGE=en_US:en
PATH=(custom, user)
LANG=en_US.UTF-8
SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.38-10-generic root=UUID=e32a9aab-f506-4471-bb71-4b4e23ec3181 ro splash vga=794 quiet splash vt.handoff=7
ProcVersionSignature_: Ubuntu 2.6.38-10.46-generic 2.6.38.7
Renderer: Unknown
SourcePackage: compiz
UpgradeStatus: Upgraded to natty on 2011-04-14 (130 days ago)
dmi.bios.date: 01/04/2010
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A15
dmi.board.name: 0T497J
dmi.board.vendor: Dell Inc.
dmi.chassis.type: 8
dmi.chassis.vendor: Dell Inc.
dmi.modalias: dmi:bvnDellInc.:bvrA15:bd01/04/2010:svnDellInc.:pnLatitudeD830:pvr:rvnDellInc.:rn0T497J:rvr:cvnDellInc.:ct8:cvr:
dmi.product.name: Latitude D830
dmi.sys.vendor: Dell Inc.
version.compiz: compiz 1:0.9.4+bzr20110606-0ubuntu1~natty2
version.libdrm2: libdrm2 2.4.23-1ubuntu6
version.libgl1-mesa-dri: libgl1-mesa-dri 7.10.2-0ubuntu2
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 7.10.2-0ubuntu2
version.nvidia-graphics-drivers: nvidia-graphics-drivers N/A
version.xserver-xorg: xserver-xorg 1:7.6+4ubuntu3.1
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:6.14.0-0ubuntu4.1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.14.0-4ubuntu7.2
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:0.0.16+git20110107+b795ca6e-0ubuntu7
Thank you for reporting this bug to Ubuntu. 11.04 reached EOL.
See this document for currently supported Ubuntu releases: https:/
Please upgrade to the latest version and re-test. If the bug is still reproducible, increase the verbosity of the steps to recreate it so we can try again.
Do feel free to report any other bugs you may find.