A patch is tested there which resulted in a very big reduction in wakeups and power consumption. There is a lot of technical discussion in that thread which I did not understand but seems important. Comments by a Ubuntu kernel expert would be very welcome.....
Some further searching turned up this relevant thread on the kernel mailing list:
http:// www.listware. net/201007/ linux-kernel/ 16253-high- power-consumpti on-in-recent- kernels. html
A patch is tested there which resulted in a very big reduction in wakeups and power consumption. There is a lot of technical discussion in that thread which I did not understand but seems important. Comments by a Ubuntu kernel expert would be very welcome.....