the Wiki-Site is great and helped a lot. But i got two issues left...

1. I use Xubuntu 12.04 (64bit) on my UX21A Prime:

How can i change the brightness in Xubuntu? The solutions on the wiki seem to work only with gnome/unity?

2. Not so important, but:

The FN-Keys for changing the brightness of the keyboard illumunation do not work, is there a general solution for that too?