Ubuntu Linux 10.10 on Samsung NP-R540

Ubuntu Linux 10.10 on Samsung NP-R540

I recently bought a cheap Samsung NP-R540 with an ATI Mobility Radeon HD 4500. Ubuntu 10.10 installed smoothly. I encountered two problems: The comercial ATI-video driver did not want to install, so I switched to the free driver and I'm happy since. The Touchpad does not work well for me in multitouch-mode.