Section "ServerLayout" 
   Identifier   "Default Layout"   
EndSection 

Section   "Monitor" 
   Identifier   "Default Monitor" 
EndSection 

Section "Device" 
   Identifier   "Radeon" 
   Driver   "radeon" 
   BusID   "PCI:02:00:0" 
EndSection 

Section "Screen" 
   Identifier "Default Screen" 
   Monitor   "Default Monitor" 
   Device "Radeon" 
EndSection