Comment 63 for bug 818830

I have installed the 64-bit kernel from http://people.canonical.com/~ogasawara/eugeni/rc6/ on my ThinkPad X220 and added the kernel parameter "i915.i915_enable_rc6=1" (RC6 was off by default). Power consumption was decreased by 25-50%, extremely roughly. I will test it for several days and then report on whether I experience glitches or freezes, as I always previously have with RC6 enabled. Fingers crossed! Thanks for your help and contributions, everyone.