I've duplicated the problem a few times in the past week. In those cases I've plugged my N810 in for the night and awakened to find it having the dimming problem. I may have set the alarm all those days. So it could be due to the alarm or it could be happening at some random point in the night. But it doesn't happen every time I plug in my N810 for the night or every time I use the alarm feature.

In these times, restarting mce has solved the screen dimming problem, but the power button still doesn't pull up the system ui menu. I have to reboot to get that back.

Are there any tests I can run now to get more information about the power button problem? Or any tests I should run the next time I duplicate the dimming problem?