https://bugzilla.novell.com/show_bug.cgi?id=717454 https://bugzilla.novell.com/show_bug.cgi?id=717454#c20 Richard Brown <RBrownCCB@opensuse.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|NEEDINFO |NEW InfoProvider|awafaa@opensuse.org | --- Comment #20 from Richard Brown <RBrownCCB@opensuse.org> 2011-10-23 12:37:27 UTC --- Hi Greg, I've been doing some experiments with those i915 module params - all of the below numbers are from Factory with kernel 3.1.0-rc9-1 X220 powertop recorded idle power consumption with full screen brightness, wifi enabled and no i915 parameters 18-20W General use (mouse movements, browser opening, etc) sees consumption spike upto 35W+ X220 powertop recorded idle power consumption with full screen brightness, wifi enabled and i915.i915_enable_rc6=1 12.8-13.1W General use (mouse movements, browser opening, etc) sees consumption spike upto 20W for brief periods X220 powertop recorded idle power consumption with full screen brightness, wifi enabled and i915.i915_enable_rc6=1 i915.powersave=1 i915.i915_enable_fbc=1 i915.lvds_downclock=1 12.5-13.0W General use (mouse movements, browser opening, etc) sees consumption spike upto 16W for brief periods So, I would say that the suggestion that i915_enable_rc6 is the key change that dramatically improves battery life looks like, with some other parameters also providing a small nudge with no side effects in my testing, yet. Removing the NEEDINFO as hopefully this answers GregKH's inforequest, still going to check out Bruno's idea though -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.