MarkusRechberger/Xinerama

Section "ServerFlags"
        Option "Xinerama" "On"
EndSection

Section "ServerLayout"
        Identifier     "XFree86 Configured"
        Screen      0  "Screen0" 0 0
        Screen      1  "Screen1" RightOf "Screen0"
        InputDevice    "Mouse0" "CorePointer"
        InputDevice    "Keyboard0" "CoreKeyboard"
EndSection

....


Section "Monitor"
        Identifier   "Monitor0"
        VendorName   "Belinea"
        ModelName    "SyncMaster"
        Option      "DPMS"
EndSection

Section "Monitor"
        Identifier   "Monitor1"
        VendorName   "SAM"
        ModelName    "SyncMaster"
        Option      "DPMS"
EndSection

....


Section "Device"
        Identifier  "Card0"
        Driver      "mga"
        VendorName  "Matrox Graphics, Inc."
        BoardName   "MGA G550 AGP"
        BusID       "PCI:1:0:0"
        Screen 0
EndSection

Section "Device"

        Identifier  "Card1"
        Driver      "mga"
        VendorName  "Matrox Graphics, Inc."
        BoardName   "MGA G550 AGP"
        BusID       "PCI:1:0:0"
        Screen 1
EndSection

Section "Screen"
        Identifier "Screen0"
        Device     "Card0"
        Monitor    "Monitor0"
        DefaultDepth     24
        SubSection "Display"
                Depth     16
                Modes    "1024x768"
        EndSubSection
        SubSection "Display"
                Depth     24
                Modes    "1280x1024" "1024x768"
        EndSubSection
EndSection

Section "Screen"
        Identifier "Screen1"
        Device     "Card1"
        Monitor    "Monitor0"
        DefaultDepth     24
        SubSection "Display"
                Depth     16
                Modes    "1280x1024" "1024x768"
        EndSubSection
        SubSection "Display"
                Depth     24
                Modes    "1280x1024" "1024x768"
        EndSubSection
EndSection

Section "DRI"
        Mode 0666
EndSection