Ubuntu Quantal Installation Guide
If you have ATI x1800 series or older, please don't use these drivers. They do not support those cards.
If you have ATI HD 2000 to HD 4000 series:
As of Oct 2012, this is the newest driver supporting these cards. For more information, please see 
If you have ATI HD 5000 series or newer:
You can also use the newest edition of the ATI drivers that support your card.
- unzip to home directory
- sudo sh ./amd-driver-installer-*.run --buildpkg Ubuntu/quantal
- sudo dpkg -i fglrx*.deb
- sudo aticonfig --initial -f