Fglrx

AMD Catalyst (FireGL and Radeon for X) is the closed source binary driver for AMD/ATI graphic cards. It was mainly written by ATI to support their FireGL cards on Linux workstations and later AMD continued work as an alternative to their open source effort on the Radeon driver.

Installation
Support for older cards, released before ~2008, has been dropped in the binary driver. To check if the card is supported: AMD HCL AMD provides a legacy driver version for unsupported cards or use the Radeon driver.

Kernel
Any DRM and Radeon related code should be disabled in the kernel or it might interfere with the closed driver.

Driver
The actual package name for the driver is

Initial setup
This will generate an initial xorg.conf which uses the fglrx driver:

If this command fails without error, copy the file to the default location

Set the opengl driver to use fglrx

Settings
The most comfortable way for most users is to use as a graphical UI to configure the driver. Users might need to be in the video group to change settings:

External resources

 * unsupported cards and legacy driver download
 * community wiki article
 * X.org wiki article