Comment 62 for bug 137598

Hardy fixed some of these issues, but introduced more at the same time. I haven't done extensive testing, but I can provide you with my observations.

In Gutsy, I had the following problem. If I set the brightness with the [Fn + Up] or [Fn + Down] keystroke, the brightness would at some point revert to the value set in the Brightness Applet. In Hardy, it seems that the opposite happens. If I set the brightness with the Brightness Applet, it will at some point revert to the value set by the [Fn + Up] or [Fn + Down] keystroke. Worse, the brightness level always reverts to some (seemingly random) value after a reboot.

I opened up a new bug to discuss the new problems (feel free to mark it a duplicate if you think that would be appropriate):
https://bugs.launchpad.net/ubuntu/+source/gnome-power-manager/+bug/223954