clipped from: ubuntuforums.org   
If you are doing fresh install of Gutsy

nstall linux-restricted-modules and restricted-manager provided in the restricted repositories:

I

sudo apt-get update
sudo apt-get install linux-restricted-modules-generic restricted-manager

sudo apt-get install compizconfig-settings-manager compiz compiz-core compiz-fusion-plugins-main compiz-fusion-plugins-extra compiz-gnome compiz-plugins libcompizconfig-backend-gconf libcompizconfig0

Install compiz

  • Install xserver-xgl package
    Code:
    sudo apt-get install xserver-xgl

  • This document is specific to proud owners of challenging ATI video cards and to the new release of Gutsy Gibbon 7.10. The guide has two sections: instructions for the fresh Gutsy install and instructions for Feisty upgrade.

    sudo aticonfig --initial