Kubuntu is for me takes the best usability of Ubuntu and KDE. Great news. For me they still need someone to improve usability and someone to create instructional materials so users can find some hidden features.
IME, this should be trivial. For Intel and AMD cards, just use xrandr. For Nvidia cards, use the provided control panel. What did you have trouble with?
Nvidia control panel would _constantly_ segfault. You're right, it should be trivial, but it wasn't. I ended up using disper and disregarding the xservers entirely.