Garrett: Reducing power consumption on Haswell and Broadwell systems

Matthew Garrett looked into why Linux systems consume too much power onrecent Intel chipsets and wrote up his results -a reduction of idle power use on his laptop from 8.5W to 5W. "Thistrend is likely to continue. As systems become more integrated we're goingto have to pay more attention to the interdependencies in order to obtainthe best possible power consumption, and that means that distributionvendors are going to have to spend some time figuring out what thesedependencies are and what the appropriate default policy is for theirusers."