Comment 15 for bug 638434

I have just tried this workaround (intel_idle.max_cstate=0) and it seems to work as it did in 10.04. Using my "highly scientific" power usage tests.. aka powertop, it is drawing only 7.8W spends ~80% in C4 and ~15% in C3 while running at 1GHz for 99% of the time.

It would be nice to get the intel idle option working to further improve the power savings, but I can live with this. Thank you Michael!

I will perform further testing to see if I experience any stuttering while playing music or videos.
Conor, for consistency's sake, were you streaming the music and videos, playing from the HDD or USB drive?
I would like to test under the same conditions to try to replicate the stuttering.