Hi,

For linux i use this Xorg.conf


Section “Monitor”
Identifier “Monitor0”
EndSection

Section “Device”
Identifier “Device1”
Driver “radeon”
EndSection

Section “ServerFlags”
Option “AIGLX” “on”
EndSection

Section “Module”
Load “dri”
Load “dri2”
Load “dbe”
Load “glx”
Load “type1”
Load “freetype”
Load “record”
EndSection

Section “DRI”
Mode 0666
EndSection

Section “Extensions”
Option “Composite” “Enable”
Option “RENDER” “Enable”
Option “RANDR” “Enable”
Option “DAMAGE” “Enable”
Option “GLX” “Enable”
EndSection

Section “Screen”
Identifier “Screen0”
Device “Device0”
Monitor “Monitor0”
DefaultDepth 24
SubSection “Display”
Depth 24
Viewport 0 0
EndSubSection
EndSection