Ubuntu Natty Installation Guide
Since Ubuntu Natty/11.04 is still under construction, so is this page. Until Natty is released, the Maverick guide will serve as the main source of info on ATI Catalyst. This page will only note items that are relevant to Natty, but not Maverick.
AMD has issued a special preview release of fglrx/Catalyst for use with Ubuntu Natty/11.04. You can install it using Synaptic or from the command line:
$ sudo apt-get install fglrx fglrx-amdcccle
Note: the Additional Drivers/jockey app does not find the proprietary driver at this time --Dtl131 00:51, 31 March 2011 (UTC)
Installing the drivers manually
Versions of Catalyst downloaded directly from AMD will not work on Natty/11.04 at this time. See the section above for details on using Catalyst.