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