The power consumption of the new Linux kernel has increased significantly.

Phoroni tested the overall system performance, power consumption, and Startup Performance of different versions of Ubuntu in his notebook. It was noted that the latest version of Ubuntu consumes more power under certain workloads, an average increase of 10%, up to 30%. Tests on Linux 2.6.35, 2.6.36, 2.6.37, 2.6.38, and 2.6.39 (Development) Kernels show that the power consumption of kernel 2.6.38 has increased significantly, and 2.6.39 has the same problem and has not been fixed yet. In the bug Reporting System of Ubuntu, users reported that the battery endurance of laptops running Ubuntu 11.04 was significantly reduced from 4 hours to around.

Http://linux.solidot.org/article.pl? Sid = 11/04/23/065216