Próbálkozz a /etc/X11/Xorg.conf-al:
Section "Screen"
Identifier "Default Screen"
Device "Configured Video Device"
Monitor "Configured Monitor"
DefaultDepth 24
SubSection "Display"
Depth 24
Modes "1440x900" "1024x768" "800x600" "640x480" "1600x1200" "1280x1024"
EndSubSection
DefaultDepth 24
EndSection
Section "Module"
Load "glx"
EndSection
Section "Device"
Identifier "Default Device"
Driver "fglrx"
EndSection
