Linux On My Samsung

Hello, I have a samsung s3511 laptop (i3-380M, 6gb RAM, Nvidia GeForce 315M 512MB GPU, 15.3" LED Screen, 640GB Hard Drive) running Ubuntu 11.04 64 bit and Windows 7 Pro 64 bit. Everything works fine except the brightness adjustment (FN+Up/Down Keys). The brightness meter that comes up when you ...