I'm using Ubuntu 11.04 on Dell Inspiron 1464 which has onboard graphics. I too had the same problem and I wrote a script to overcome this issue. Thought it would good to share it with the community.
http://blog.ishans.info/2011/09/25/set-brightness-automatically-at-the- startup-in-linux/ -- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to gnome-power-manager in Ubuntu. https://bugs.launchpad.net/bugs/137598 Title: Screen brightness resets to default (maximum) on idle with AC plugged in To manage notifications about this bug go to: https://bugs.launchpad.net/gnome-power/+bug/137598/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs