Section "Screen"
        Identifier      "Default Screen"
        Device          "ATI Graphics Adapter"
#       Device          "ATI Technologies, Inc. R420 JK [Radeon X800]"
        Monitor         "Fujitsu Siemens 21"
        DefaultDepth    24
        SubSection "Display"
                Depth           24
                Modes           "1280x1024" "1152x864" "1024x768" "800x600" "640x480"
                ViewPort 0 0 # initial origin if mode is smaller than desktop
        EndSubSection
EndSection