If you look in the bios settings there is a setting for Brightness control, and it is set to Auto by default, try changing that to manual and see if you are able to use the brightness keys.
-- brightness no more working on karmic (KMS) https://bugs.launchpad.net/bugs/397617 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs