Installed 10.04 on an Asus UL20A.
Everything works, including suspend/hibernate, with the exception of:
- Screen brightness function key does not work, along with the LCD brightness applet which does not either. Clicking on it with a mouse makes the brightness cursor disappear, though the UP and DOWN cursor keys seem to have a limited effect - no gradual dimming, though, only "low" and "high".
- The screen flickers very briefly once in a while, not often enough to make the laptop unusable, but it is annoying all the same.