Comment 68 for bug 760131

Installing it right now, Before results are :

Dell XPS15 with Intel Sandybridge (screen on lowest brightness)

Wakeups : 200-300
Power usage : 13,7 - 16,8 W

Cn Avg residency P-states (frequencies)
C0 (cpu running) (14,9%) Turbo Mode 3,5%
polling 0,3ms ( 0,0%) 1400 Mhz 0,3%
C1 mwait 0,4ms ( 2,5%) 1200 Mhz 0,2%
C2 mwait 0,8ms ( 1,4%) 1000 Mhz 0,7%
C3 mwait 0,9ms ( 0,2%) 800 Mhz 95,1%
C4 mwait 4,2ms (81,0%)

I will update in a few minutes with results with the patch.