This is a long shot but I figure I'd ask here.
Long story short, I ditched win8 on my new laptop (as above it's a g580 with: i3proc, HD 4000 graphics) and I've run into an issue where the fn keys don't work to change the screen brightness.
I've attempted all fixes in the following thread (specifically post #15 and #17 and not seen any effects. http://ubuntuforums.org/showthread.php?t=1875126&page=2
Any further thoughts on the matter or am I just screwed until a fix comes along later? On the last page someone other than me with the same laptop as posted that the previously mentioned fixes have not been helpful.
Thanks for any help rendered in advance.