Screen brightness on sony vgn-cr420

My Fn keys seem not to work and screen brightness cannot be adjusted.

Laptop: sony vgn-cr420
Graphics:Intel GMA650

suse version 11.1

previously I had the same problem with Ubuntu.
A friend of mine told me that I had to run some script to activate the ACPI I tried but I don’t know where to look for it neither my friend do. :frowning: