i have upgraded the 2.6.27-11-generic today and now the screen brightness control works fine.
-- 2.6.27-11 makes brightness not work https://bugs.launchpad.net/bugs/315922 You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to gnome-power-manager in ubuntu. -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs