It appears the mousepoll plugin timer sometimes gets stuck on, and keeps polling when it probably should not any more.
See also: bug 961202
ORIGINAL DESCRIPTION:
Week 32: Ubuntu 12.10 Quantal (Radeon) with ppa:unity-team/staging
Test Case ID: Can 35
Failure reason: The number of wakeups per second (events per second) reported for the compiz process is 62.
Follow the below steps:
#. Ensure the screen is idle, with very little changing.
#. Open a terminal and start a tool that can measure process wakeups per
second. You can choose one of:
- gnome-power-statistics (click on Processor)
- powertop
- eventstat
#. Hover the mouse pointer over the top end of the Launcher. That's just above
the Ubuntu icon.
#. Hover the mouse pointer over the bottom end of the Launcher. That's over
the bottom of the trash icon.
#. Move the mouse pointer back to the centre of the screen and leave it there.
#. Wait 30-60 seconds, leaving the screen idle before verifying the Outcome.
Expected Result:
The number of wakeups per second (events per second) reported for the compiz process should be much lower than 50.
ProblemType: Bug
DistroRelease: Ubuntu 12.10
Package: unity 6.0.0+bzr2538ubuntu0+746 [origin: LP-PPA-unity-team-staging]
ProcVersionSignature: Ubuntu 3.5.0-8.8-generic 3.5.0
Uname: Linux 3.5.0-8-generic i686
ApportVersion: 2.4-0ubuntu6
Architecture: i386
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]
CrashDB: unity
Date: Tue Aug 7 17:34:49 2012
InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Alpha i386 (20120713.1)
ProcEnviron:
LANGUAGE=en_GB:en
TERM=xterm
PATH=(custom, no user)
LANG=en_GB.UTF-8
SHELL=/bin/bash
SourcePackage: unity
UpgradeStatus: No upgrade log present (probably fresh install)
with the test case I see 85-90 wakeups here.