I installed Xubuntu 13.04 on this laptop: http://www.novatech.co.uk/laptop/range/novatecheliten1535.html
The Fn keys for WiFi and screen brightness work fine, but the volume keys are problematic. When I press 'mute', 'volume up' or 'volume down', the keypress is registered, but the key release isn't. This means the system keeps trying to adjust the volume indefinitely (or toggle mute/unmute), and it becomes unresponsive to keyboard input.
I can make it respond to input again if I log out and log in again but it would be really good if I could make this work and not have to remember never to touch these buttons!
I think this issue is similar to this thread: Fn key sticks down (except he had trouble with brightness keys instead of volume) but I don't think that solution will work because this is an uncommon laptop model.