Installion of a ATI graphics Card
Find out what graphics card is installed
sudo lspci | grep -i vga
Then search the driver for the video card
AMD Catalyst 12.6 (For Radeon HD 7000, Radeon HD 6000 and Radeon HD 5000 series GPUs.)
AMD Catalyst Legacy 13.1 via wheezy backports
(For Radeon HD 4000, Radeon HD 3000 and Radeon HD 2000 series GPUs.)
Backports for /etc/apt/source.list
deb http://us.debian.org/debian wheezy-backports main
Install the ATI driver
sudo aptitude update
sudo aptitude -r install linux-headers-$(uname -r|sed 's,[^-]*-[^-]*-,,') fglrx-driver
Configuring the Xserver
sudo mkdir /etc/X11/xorg.conf.d
sudo echo -e 'Section "Device"\n\tIdentifier "My GPU"\n\tDriver "fglrx"\nEndSection' > /etc/X11/xorg.conf.d/20-fglrx.conf
sudo reboot
Congratulations now the ATI graphics card is installed
--Sascha Trott (talk) 21:41, 10 November 2013 (MSK)