This works for me:


Code:
Section "InputDevice"
        Identifier  "PS/2 Mouse"
        Driver      "mouse"
        Option      "Protocol" "auto"
Option          "ZAxisMapping"          "4 5"
        Option      "Device" "/dev/psaux"
        Option      "Emulate3Buttons" "true"
        Option      "Emulate3Timeout" "70"
        Option      "SendCoreEvents"  "true"
EndSection