I am running Ubuntu 12.04 and I love it! The only problem is the keys for my brightness, F6 and F7, does not work when I am on battery power or AC power. It randomly works after I am idle for a while and log back in. The other weird thing is to see my battery indicator, I need to toggle my touch pad button that is right above the actual pad on and off for it to show up, and then back on so I can use my touch pad, obviously. The only other Fn buttons that work on my laptop is the button to mute F1 Touch pad on and off F9 and Fn+3 and Fn+4 for my volume.
The only Fn buttons that I care if they work again are my brightness, which again, are F6 and F7.