Comment 31 for bug 137598

I just started having this problem on my T42p. I can confirm that:
1. If I change the brightness using the Fn keys, after a while, the brightness level is reset.
2. If I set the brightness using the Fn keys and open gnome-power-manager, it resets the brightness to what was previously set there.
2. Using the brightness applet instead of the Fn keys to change brightness resolves this problem.

Another interesting aspect to note is that the brightness applet is capable of "reading-in" the current brightness level. For instance, if I change the brightness using the Fn keys and click on the brightness applet, the proper brightness level is reflected there. Thereafter, if I open the gnome-power-manager, it will reflect this value.

Hence, another workaround is to use the Fn keys and immediately click on the brightness applet once. This will essentially sync the current brightness value with gnome-power-manager.

Its been more than a month since I installed Gutsy. I have been playing around with my system (install/uninstall tpb among others). Also, I just installed kde4 . I am wondering if some of these could have been the source of the problem.

- Naveen