prova anche così...

Section "ServerFlags"
Option "AIGLX" "off"
EndSection

Section "Device"
Identifier "ATI Technologies Inc RV280 [Radeon 9200 SE]"
Driver "radeon"
Option "UseFBDev" "true"
EndSection

Section "ServerLayout"
Identifier "Default Layout"
Screen "Default Screen"
InputDevice "Generic Keyboard"
InputDevice "Configured Mouse"
EndSection

Section "Extensions"
Option "Composite" "Enable"
EndSection

Section "dri"
Group 0
Mode 0666
EndSection

speriamo funge... :master: