(In reply to comment #124)
> 
> And for the DPM stuff: dpm doesn't seem to work, the numbers never changed
> (tested on console without X and Metro Last Light; I dropped my previous
> "radeon.dpm=0" from the kernel parameters):
> # cat /sys/kernel/debug/dri/64/radeon_pm_info
> power level avg    sclk: 30000 mclk: 15000

You need to print that out while you have a 3D app running.  Those numbers are
real-time.  E.g., in the console, there is no 3D acceleration happening so they
stay at their low levels.