high cpu use with two monitors

Bug #831202 reported by Mauricio Pretto on 2011-08-22
This bug affects 5 people
Affects Status Importance Assigned to Milestone
unity (Ubuntu)

Bug Description

when connected to sencond screen my laptop have a very high compiz cpu usage

 2896 mauricio 20 0 861m 281m 26m S 61 3.7 392:38.32 compiz

ProblemType: Bug
DistroRelease: Ubuntu 11.10
Package: unity 4.8.2-0ubuntu4
ProcVersionSignature: Ubuntu 3.0.0-9.12-generic 3.0.3
Uname: Linux 3.0.0-9-generic x86_64
Architecture: amd64
CompizPlugins: [core,bailer,detection,composite,opengl,decor,mousepoll,vpswitch,regex,animation,snap,expo,move,compiztoolbox,place,grid,imgpng,gnomecompat,wall,ezoom,workarounds,resize,fade,unitymtgrabhandles,scale,session,unityshell]
CompositorRunning: compiz
Date: Mon Aug 22 10:45:58 2011
DistUpgraded: Log time: 2011-08-20 19:06:22.573648
DistroCodename: oneiric
DistroVariant: ubuntu
 Intel Corporation Core Processor Integrated Graphics Controller [8086:0046] (rev 02) (prog-if 00 [VGA controller])
   Subsystem: Acer Incorporated [ALI] Device [1025:040e]
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Alpha amd64 (20110814)
MachineType: Acer Aspire 1830
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.0.0-9-generic root=UUID=ceef480a-ee53-4c2a-9e1e-ac588a21ba49 ro quiet splash vt.handoff=7
SourcePackage: unity
UpgradeStatus: Upgraded to oneiric on 2011-08-20 (1 days ago)
dmi.bios.date: 07/09/2010
dmi.bios.vendor: INSYDE
dmi.bios.version: V1.14
dmi.board.asset.tag: Base Board Asset Tag
dmi.board.name: Base Board Product Name
dmi.board.vendor: Intel Corp.
dmi.board.version: Base Board Version
dmi.chassis.type: 1
dmi.chassis.vendor: Chassis Manufacturer
dmi.chassis.version: Chassis Version
dmi.modalias: dmi:bvnINSYDE:bvrV1.14:bd07/09/2010:svnAcer:pnAspire1830:pvrV1.14:rvnIntelCorp.:rnBaseBoardProductName:rvrBaseBoardVersion:cvnChassisManufacturer:ct1:cvrChassisVersion:
dmi.product.name: Aspire 1830
dmi.product.version: V1.14
dmi.sys.vendor: Acer
version.compiz: compiz 1:
version.ia32-libs: ia32-libs 20090808ubuntu16
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+7ubuntu6
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
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:0.0.16+git20110411+8378443-1

Mauricio Pretto (pretto) wrote :
Launchpad Janitor (janitor) wrote :

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

Changed in unity (Ubuntu):
status: New → Confirmed
Didier Roche (didrocks) on 2011-10-25
Changed in unity:
status: New → Confirmed
Javier Rivera (javier-isotecsl) wrote :

I have the same symptoms are a similar graphic card. If I disable the Unity plugin in CSM (and enabled awn to have a dock) everything is back to normal. So it looks like a unity issue.

It's hard to reproduce since it doesn't happen at boot time but after I spend some time with the machine. Disabling and enabling Unity in CSM seems to help.

Mauricio Pretto (pretto) wrote :

On another machine (with ATI graphics) I had to switch to Unity 2d to get a usable machine

Javier Rivera (javier-isotecsl) wrote :

My problem seems to be related to java, cpu usage is only high when some java program is running. So it's likely a new bug.

Omer Akram (om26er) wrote :

Thanks for the bug report. Is that still an issue for you Ubuntu 12.04 with all updates applied? Can you please test that and let us know?

Changed in unity (Ubuntu):
status: Confirmed → Incomplete
Changed in unity:
status: Confirmed → Incomplete
Daniel van Vugt (vanvugt) wrote :

I think this would be the same issue as bug 874619, so will mark it as a duplicate.

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