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5. Configuration under XFree86 4

(from Lee Monamy)

Example XF86Config-4 for an ELO touch screen:

Section "InputDevice"
        Identifier "ELO touchscreen"
        Driver "elographics"
        Option  "Device"        "/dev/ttyS0"
        Option  "MinimumXPosition"      "300"
        Option  "MaximumXPosition"      "3700"
        Option  "MinimumYPosition"      "300"
        Option  "MaximumYPosition"      "3700"
        Option  "UntouchDelay"  "10"
        Option  "ReportDelay"   "10"
        Option  "SendCoreEvents"        "yes"
EndSection

Noteable differences between this and the version 3 config are that you specify a Device, *not* a Port, otherwise you get an error. Also, AlwaysCore from v3 has been replaced with SendCoreEvents.

You must also add to the ServerLayout section, despite that X might say: "(II) XINPUT: Adding extended input device "TOUCHSCREEN" (type: Elographics Touch Screen)"

Section "ServerLayout"
        Identifier      "Default Layout"
        Screen  "Default Screen"
        InputDevice "Generic Keyboard"
...
        InputDevice "ELO touchscreen"
EndSection