https://bugs.freedesktop.org/show_bug.cgi?id=78453
--- Comment #126 from Alex Deucher agd5f@yahoo.com --- (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.