Op maandag 03 oktober 2011 03:35:44 schreef Norman Carver: > Set up a new server for home use (DNS, files, etc.) and > was gratified to find it using around 50 watts when the > older machine it replaces was using around 90. > However, just before sticking it in the closet, I changed > it to runlevel 3 since I won't be using the GUI typically. > I had assumed this might reduce power usage a bit > more, but surprisingly it caused the power draw to go UP > by about 3 watts! I thought it a fluke, but verified that > this is a real phenomenon: the machine draws about > 3 watts less when X and KDE are running than when > they are not. Seems like running more processes should > cause more power usage. Any ideas what might be > causing what I see? Odd. > > I note that: > (1) I set kernel scaling_governor parameter for > each core to ondemand for any runlevel; > (2) whether logged into KDE or just sitting at the > DM the power usage is stabilizes at the same level > when in runlevel 5; > (3) I have not made any power settings in KDE and > the power applet is not running; > (4) runlevel 5 has all the same services as runleve 5 > plus: dm and atieventsd. > > Thanks for any insights! > Norm
Perhaps when X and KDE is running, existing processes have less CPU time, due to it and these processes take more power/CPUcycle than X/KDE?
