On my Dell XPS 18 Tablet-PC, the touchscreen is known not to work in Ubuntu.
I just tried the OpenSuse Factory KDE Live CD. After installing a few extra packages - see
touching the screen worked like a charm without rebooting or relogging.
I tried to install the same (or similarly) named packages in an Ubuntu 13.04 Live System - doesn't work.
Does anyone know how to transfer it to Ubuntu? I really don't wanna use Suse.