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)