Public bug reported:

When the screen goes to sleep and then I move a mouse or hit a key,
compiz takes 100% cpu and takes several *minutes* before drawing the
screen. The mouse pointer appears and moves around properly but the rest
of the screen remains black. The load is not high on the machine or
anything. Compiz simply takes 100% for several minutes in order to wake
the machine up and then things settle back down.

It literally makes the machine unusable for minutes at a time.

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: compiz 1:0.9.7.2-0ubuntu1
ProcVersionSignature: Ubuntu 3.2.0-20.32-generic 3.2.12
Uname: Linux 3.2.0-20-generic x86_64
.tmp.unity.support.test.0:
 
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: Mon Mar 26 13:28:43 2012
DistUpgraded: Fresh install
DistroCodename: precise
DistroVariant: ubuntu
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111012)
MachineType: Dell Inc. XPS 8300
PackageArchitecture: all
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-20-generic 
root=UUID=d16fbb2d-b466-4e7e-a654-f170338c213f ro
SourcePackage: compiz
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 02/15/2011
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A03
dmi.board.name: 0Y2MRG
dmi.board.vendor: Dell Inc.
dmi.board.version: A00
dmi.chassis.type: 3
dmi.chassis.vendor: Dell Inc.
dmi.modalias: 
dmi:bvnDellInc.:bvrA03:bd02/15/2011:svnDellInc.:pnXPS8300:pvr:rvnDellInc.:rn0Y2MRG:rvrA00:cvnDellInc.:ct3:cvr:
dmi.product.name: XPS 8300
dmi.sys.vendor: Dell Inc.
version.compiz: compiz 1:0.9.7.2-0ubuntu1
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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packagers, which is subscribed to compiz in Ubuntu.
https://bugs.launchpad.net/bugs/965581

Title:
  Compiz doesn't wake up

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