AMD has recently updated its driver for Linux to version 12.6 which brings support to Linux Kernel 3.4. Details about this release are scarce from the side of AMD, but what we know now is that the AMD ATI Catalyst 12.6 driver supports more GPUs (R600/R700) and Xorg-Server 1.12.
In this tutorial, we will help you install this driver under Ubuntu 12.04 or older (applicable also for Ubuntu derivatives) and any other Ubuntu-based system like Linux Mint 13 or older.
AMD ATI Catalyst 12.6 Installation
Uninstall the old AMD driver with these commands:
sudo sh /usr/share/ati/fglrx-uninstall.sh
sudo apt-get remove --purge fglrx fglrx_* fglrx-amdcccle* fglrx-dev* xorg-driver-fglrx
Then start the installation of AMD Catalyst 12.6 with these commands:
cd /tmp && wget -O amd-driver-12-6-x86_64.run http://goo.gl/XBFyI
chmod +x amd-driver-12-6-x86_64.run
sudo sh amd-driver-12-6-x86_64.run
Follow now setup instructions:
If the driver is well installed, you need to run now this command:
sudo aticonfig --initial -f
Then restart your computer.