Ubuntu Edgy (ATI) Installation Guide (cline)

open terminal window:

$ sudo cp /etc/X11/xorg.conf /etc/X11/xorg.bkp ##backup xorg.conf

$ sudo nano -w /etc/X11/xorg.conf ## open xorg.conf

add these lines at the end of the file:

#-------------------------------------
Section "Extensions"
Option "Composite" "Disable"
Option "Composite" "false"
EndSection
#-------------------------------------

ctrl+X exit editor >save modified buffer ? > yes

$ sudo apt-get update # updating repos
$ sudo apt-get install linux-restricted-modules-$(uname -r) #Okay if it is already installed
$ sudo apt-get install xorg-driver-fglrx # installing driver
$ sudo depmod -a
$ sudo aticonfig --initial
$ sudo aticonfig --overlay-type=Xv

$ sudo nano -w /etc/X11/xorg.conf # edit xorg.conf file again

search this lines to enable direct rendering if dont required skip this step

Driver "ati"
or
Driver "radeon"

and replace with

Driver "fglrx"

reboot your system.