I just installed Oneiric on a SAMSUNG NP300V3A (Series 3) laptop. Everything seems to work fine more or less except one thing: I can't reduce screen brightness more than 10% or so. Fn+F3 (brightness up) sets brightness to 100% and Fn+F2 (brightness down) sets it to about 90% or so. No matter how many more times I press it, it doesn't fall below that. For a video card I have an integrated Intel HD Graphics 3000 chipset, but that's probably unrelated to the issue. What can I do to solve this?