Comment 3 for bug 901630

If it's a serial touchscreen, try these instructions from Brian Murray:

http://www.murraytwins.com/blog/?p=103

If it's a usb touchscreen, try uninstalling xserver-xorg-input-wacom.

Hopefully after the above your touchscreen will be using the X evdev input module. It has support for multitouch, which will then work with uTouch for gestures.