Comment 1 for bug 782821

I am having precisely this same issue on a Lenovo IdeaPad Y560. I have mint 11 dual booted on a separate partition with windows 7. I reinstalled every package having to do with power management and that seemed to fix the issue temporarily. However, the moment I try and change any of the default power management settings, it starts to happen again. The other part of this issue not mentioned in roadrash's report is that the brightness control indicator keeps popping up on the right-top part of the screen every time the system automagically changes the brightness.