Interesting; few people confirm in bug 840683 that the dimming doesn't occur at all. The bug's description and second comment suggest that the 'dim on idle and on power' option isn't even coded or at least its description is misleading. What graphic card do you use? I recommend you to follow that bug report too. Feel free to continue to report any other bugs you may find.
** Summary changed: - [Oneiric] Dim on idle does not brighten with activity + Dim on idle does not brighten with activity -- 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/844241 Title: Dim on idle does not brighten with activity To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-power-manager/+bug/844241/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs