ATI dual head xorg.conf

Just to keep a record of a configuration working on my home box:

 

cat /etc/X11/xorg.conf

Section "Screen"
 Identifier "Default Screen"
 DefaultDepth 24
 Monitor "Monitor0"
 DefaultDepth 24
 SubSection "Display"
 Modes "1680x1050" "1680x1050"
 Virtual 3360 2100 
EndSubSection
EndSection
Section "Module"
 Load "glx"
EndSection
Section "ServerLayout"
 Identifier "Default Layout"
 Screen "Default Screen" 0 0
 Option "AIGLX" "on"
EndSection
Section "Device"
 Identifier "Default Device"
 Driver "fglrx"
 Option "UseFastTLS" "1"
 BusID "PCI:4:0:0"
 Option "Monitor-DVI-I-0" "Monitor0" 
 Option "Monitor-DVI-I-1" "Monitor1"
EndSection
Section "Monitor"
 Identifier "Monitor0"
 Option "Primary" "True"
EndSection
Section "Monitor"
 Identifier "Monitor1"
 Option "RightOf" "Monitor0" 
 Option "Primary" "False"
EndSection