remove linux ati driver

Uninstalling the ATI Linux Proprietary Driver
Uninstalling the ATI Linux Proprietary Driver is dependent on the mode of the
initial installation.
Automatic or Custom Driver Installations
If the ATI Proprietary Linux Driver was installed using either the Automatic or
Custom options, then do the following:
1 Launch the Terminal Application/Window and navigate to the /usr/share/ati
folder
2 With superuser permissions, enter the command "sh ./fglrx-uninstall.sh"
You have now successfully uninstalled the ATI Linux Proprietary Driver.