radeon: cooler and cheaper! (finally)

Woohoo! Since 3 or 4 days ago the radeon (RV770) in my computer runs much cooler, if one switches power_profile from default to low. I don’t know where the change happened, maybe somewhere in the last stable-kernel updates, but i didn’t read anything about it in the release information. From the day AMD announced to release documentation helping kernel/xorg developers producing a working open source driver many people waited for such events. Despite my card is a bit older (in terms of graphic card lifetime) that change will let the card run on lower temperatures and saves me a dollar^wEuro because that means a huge drop in energy consumption too. +20 watt less is a number i’ll see on my annual energy bill. And noise level dropped too. The driver already had *some* power management functions but for a long time voltage/frequency lowering only worked in dpms standby/off (means: monitor in standby or off) and not during normal operation. So, to me it seems like a late Christmas Gift.