Mtdev project is a part of Ubuntu Maverick multitouch architecture. You can read more on http://wiki.ubuntu.com/Multitouch
To configure MTDev, it’s preferable to use probesysfs providers. Check probesysfs for more information.
Otherwise, you can put in your configuration
[input]
# devicename = hidinput,/dev/input/eventXX
acert230h = mtdev,/dev/input/event2
Note
You must have read access to the input event.
You have the possibility to use custom range for some X, Y and pressure value. On some drivers, the range reported is invalid. To fix that, you can add one of theses options on the argument line :