https://bugs.freedesktop.org/show_bug.cgi?id=73788
--- Comment #11 from Alex Deucher agd5f@yahoo.com --- (In reply to comment #8)
There are no errors and no success in changing power_method. Where did I do mistake?
We don't support changing between dpm and the older methods dynamically. When you enable dpm, you can't switch to the older pm methods.