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[Bug 964049] [NEW] compiz high CPU usage when screen powered off


Public bug reported:

When my screen powers off after 5 minutes of inactivity compiz starts
consuming a large amount of CPU time (resulting in fans running harder -
hence I noticed the issue).

Stops as soon as I unlock - output from top indicates compiz is
consuming alot of CPU time:

top - 18:29:13 up 10:12,  0 users,  load average: 0.19, 0.39, 0.75
Tasks: 242 total,   1 running, 239 sleeping,   0 stopped,   2 zombie
Cpu(s):  4.5%us,  2.0%sy,  0.0%ni, 93.3%id,  0.3%wa,  0.0%hi,  0.0%si,  0.0%st
Mem:   3980564k total,  3223868k used,   756696k free,   177728k buffers
Swap:  4124668k total,        0k used,  4124668k free,  1084480k cached

  PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND                                                  
13031 jamespag  20   0 1519m 105m  52m S   26  2.7 323:22.61 compiz                                                   12796 root      20   0  568m 181m 141m S    9  4.7   4:35.38 Xorg                                                     
13469 jamespag  20   0  981m 277m  45m S    3  7.1   3:35.75 firefox                                                  13095 jamespag  20   0  397m  11m 7584 S    2  0.3   0:02.18 bamfdaemon                                               
13797 jamespag  20   0  645m  38m  18m S    2  1.0   0:17.97 /usr/bin/termin                                          13006 jamespag  20   0 27948 3488  628 S    1  0.1   0:04.06 dbus-daemon

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: compiz 1:
ProcVersionSignature: Ubuntu 3.2.0-20.32-generic 3.2.12
Uname: Linux 3.2.0-20-generic x86_64
NonfreeKernelModules: fglrx
ApportVersion: 1.95-0ubuntu1
Architecture: amd64
CompizPlugins: [core,composite,opengl,compiztoolbox,decor,vpswitch,snap,mousepoll,resize,place,move,wall,grid,regex,imgpng,session,gnomecompat,animation,fade,unitymtgrabhandles,workarounds,scale,expo,ezoom,unityshell]
CompositorRunning: compiz
Date: Sat Mar 24 18:25:21 2012
DistUpgraded: Fresh install
DistroCodename: precise
DistroVariant: ubuntu
 blcr, 0.8.2: added
 fglrx, 8.960, 3.2.0-20-generic, x86_64: installed
MachineType: Dell Inc. Studio 1558
PackageArchitecture: all
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-20-generic root=UUID=c3b984e3-15cf-4a8c-a718-868679884017 ro
SourcePackage: compiz
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 06/24/2010
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A07
dmi.board.name: 0874P6
dmi.board.vendor: Dell Inc.
dmi.board.version: A07
dmi.chassis.type: 8
dmi.chassis.vendor: Dell Inc.
dmi.chassis.version: A07
dmi.modalias: dmi:bvnDellInc.:bvrA07:bd06/24/2010:svnDellInc.:pnStudio1558:pvrA07:rvnDellInc.:rn0874P6:rvrA07:cvnDellInc.:ct8:cvrA07:
dmi.product.name: Studio 1558
dmi.product.version: A07
dmi.sys.vendor: Dell Inc.
version.compiz: compiz 1:
version.fglrx-installer: fglrx-installer N/A
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.32-1ubuntu1
version.libgl1-mesa-dri: libgl1-mesa-dri 8.0.2-0ubuntu2
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 8.0.2-0ubuntu2
version.xserver-xorg-core: xserver-xorg-core 2:1.11.4-0ubuntu7
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

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

** Tags: amd64 apport-bug compiz-0.9 precise ubuntu

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