laptop compaq evo n800v
acpi: fan never turns off completely. It states "ok" but is in "active(1)".
(Workaround: make machine work until fan turn to "full noise speed" , then kill the process, wait -> fan turns off)
palm-sync with gnome-pilot does not work reliably. In the forums it was reported to be a kernel-bug with some versions (can't remember exact details)
No 3d rendering. I believe the graphics card is not correctly detected. It should be an ati mobility 7500 (hardware-specs from compaq), ubuntu detects 8500. I think there is no accelerated driver for 7500?
backlight adjustment does not work as soon as x is started. (?!)
No dvd-playing on external monitor (black window)
loudspeaker-keys are not recognized
All in all a very pleasant experience!