I am trying out the UTouch button test from here:
http://www.henningkarlsen.com/electronics/library.php?id=55
I have a Sainsmart 3.2" TFT and an Arduino Mega 2650.
The demo "Button Test" on Ubuntu 14.04, does not work, the screen does not reconise the presses, even after doing the calibration it does not work. My touch is not reconised or very inaccurate.
On my Mac, exactly the same setup, everything works fine. Why does Ubuntu not work? I installed it from the Ubuntu SW manager. Do I need any special drivers?