Compiz CPU load is 100% when system idling and screen blank

Bug #995118 reported by Anders Frisk on 2012-05-05
This bug affects 11 people
Affects Status Importance Assigned to Milestone
compiz (Ubuntu)

Bug Description

Compiz CPU load is about 8% when system is idling and the screen is on. About 30 seconds after the screen goes blank the CPU load increases to 100% and remain at that level until keyboard or mouse activity enables the screen. At that time the CPU load returns to 8%. The system gets very hot and the fan is running at maximum speed when the screen is blank.

Problem came after upgrade from 11.10 to 12.04. No problem if using Ubuntu 2D mode.

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: compiz 1:
ProcVersionSignature: Ubuntu 3.2.0-24.37-generic-pae 3.2.14
Uname: Linux 3.2.0-24-generic-pae i686
NonfreeKernelModules: fglrx wl

ApportVersion: 2.0.1-0ubuntu7
Architecture: i386
CompizPlugins: [core,bailer,detection,composite,opengl,decor,mousepoll,resize,gnomecompat,wall,imgpng,unitymtgrabhandles,vpswitch,regex,snap,compiztoolbox,animation,grid,move,place,workarounds,expo,fade,session,scale,ezoom,unityshell]
CompositorRunning: compiz
Date: Sat May 5 17:22:39 2012
DistroCodename: precise
DistroVariant: ubuntu
 bcmwl,, 3.0.0-19-generic-pae, i686: installed
 bcmwl,, 3.2.0-24-generic-pae, i686: installed
 fglrx, 8.960, 3.2.0-24-generic-pae, i686: installed
 Advanced Micro Devices [AMD] nee ATI Wrestler [Radeon HD 6310] [1002:9802] (prog-if 00 [VGA controller])
   Subsystem: Hewlett-Packard Company Device [103c:1611]
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release i386 (20110427.1)
 xorg:fglrx_updates - ATI/AMD proprietary FGLRX graphics driver (post-release updates) (Proprietary, Disabled, Not in use)
 kmod:wl - Broadcom STA wireless driver (Proprietary, Enabled, In use) [auto-install]
 xorg:fglrx - ATI/AMD proprietary FGLRX graphics driver (Proprietary, Enabled, In use)
MachineType: Hewlett-Packard HP 3105m
PackageArchitecture: all
 PATH=(custom, user)
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-24-generic-pae root=UUID=601a5d17-56cf-4ac3-b5c7-c3a2a7665e11 ro quiet splash
SourcePackage: compiz
UpgradeStatus: Upgraded to precise on 2012-05-03 (1 days ago)
XorgConf: Error: [Errno 13] Permission denied: '/etc/X11/xorg.conf' 07/07/2011
dmi.bios.vendor: Hewlett-Packard
dmi.bios.version: F.13
dmi.board.asset.tag: Base Board Asset Tag 1611
dmi.board.vendor: Hewlett-Packard
dmi.board.version: 96.3A
dmi.chassis.asset.tag: Chassis Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: Hewlett-Packard
dmi.chassis.version: Chassis Version
dmi.modalias: dmi:bvnHewlett-Packard:bvrF.13:bd07/07/2011:svnHewlett-Packard:pnHP3105m:pvr059D100000250000000320100:rvnHewlett-Packard:rn1611:rvr96.3A:cvnHewlett-Packard:ct10:cvrChassisVersion: HP 3105m
dmi.product.version: 059D100000250000000320100
dmi.sys.vendor: Hewlett-Packard
version.compiz: compiz 1:
version.fglrx-installer: fglrx-installer N/A
version.libdrm2: libdrm2 2.4.32-1ubuntu1
version.libgl1-mesa-dri: libgl1-mesa-dri 8.0.2-0ubuntu3
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 8.0.2-0ubuntu3
version.xserver-xorg-core: xserver-xorg-core 2:1.11.4-0ubuntu10.1
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.7.0-0ubuntu1
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:6.14.99~git20111219.aacbd629-0ubuntu2
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.17.0-1ubuntu4
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:0.0.16+git20111201+b5534a1-1build2

Anders Frisk (anders-frisk650) wrote :
Launchpad Janitor (janitor) wrote :

Status changed to 'Confirmed' because the bug affects multiple users.

Changed in compiz (Ubuntu):
status: New → Confirmed
jqno (jan-ouwens) wrote :

This happens to me, too. I had to switch to Unity2D because otherwise the computer would just make too much noise when I'm watching tv.

Anders Frisk (anders-frisk650) wrote :

I just noticed that this bug probably is the same as bug#969860 and bug#961202

Pedro Lacerda (w3lcome) wrote :

This happens to me too.

Is there any information I can provide you with? What are the commands I should type to get those informations?


Joao Silva (joaoabs) wrote :

Also happening to me. Is there any workaround we can use until is not solved? (besides moving the mouse)


Daniel van Vugt (vanvugt) wrote :

Thank you for taking the time to report this bug and helping to make Ubuntu better. This particular bug has already been reported and is a duplicate of bug 969860, so it is being marked as such. Please look at the other bug report to see if there is any missing information that you can provide, or to see if there is a workaround for the bug. Additionally, any further discussion regarding the bug should occur in the other report. Feel free to continue to report any other bugs you may find.

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