Public bug reported:

When not doing anything, the system should use close to no cpu
ressource.

However gnome-shell is permanantly displaying a cpu usage higher than normal. 
This happens even even after fresh boot with no application running.
Opening applications tends to make the cpu usage of gnome-shell rise abnormally.
When nothing is open and I don't touch the mouse, gnome shell takes several 
percents already. Touching the mouse or having firefox or nautilus open takes 
on average 30% of one of the cores and rises to 70% with Clementine open.

I'm running a fresh amd64 precise install. Actually I installed twice
and the problem showed up both times. There was no issue at first. I
suspect the proprietary drivers to be involved, though I cannot remember
exactly if the problem arose right after their installation. I'm using
the latest version of fglrx from amd's website.

I think the following threads are about the same problem:
http://ubuntuforums.org/showthread.php?t=1980053
http://ubuntuforums.org/showthread.php?t=1966865

Unfortunatly I can't confirm that removing the proprietary drivers
solves the problem as the open source ones do not support 3D features
for my graphic card yet and I would end up on a fallback session.

I'm not accustomed to making bug reports so if their is anything else
needed ask away.

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: gnome-shell 3.4.1-0ubuntu2
ProcVersionSignature: Ubuntu 3.2.0-24.37-generic 3.2.14
Uname: Linux 3.2.0-24-generic x86_64
NonfreeKernelModules: wl fglrx
ApportVersion: 2.0.1-0ubuntu7
Architecture: amd64
Date: Thu May 17 22:21:55 2012
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64 
(20120425)
ProcEnviron:
 TERM=xterm
 PATH=(custom, no user)
 LANG=fr_FR.UTF-8
 SHELL=/bin/bash
SourcePackage: gnome-shell
UpgradeStatus: No upgrade log present (probably fresh install)

** Affects: gnome-shell (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug cpu gnome-shell precise third-party-packages

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https://bugs.launchpad.net/bugs/1001000

Title:
  gnome-shell high cpu usage

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