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Linux 3.1 Kernel Draws More Power With Another Regression

Michael Larabel

Published on 22 August 2011
Written by Michael Larabel
Page 2 of 2 - 54 Comments

Fortunately, not all systems are affected by this regression. When testing a Lenovo ThinkPad W510 with an Intel Core i7 720Q CPU, 4GB of RAM, 160GB Intel SSD, and NVIDIA Quadro FX 880M graphics. Additional details can be found on OpenBenchmarking.org.

This older Intel quad-core notebook didn't see any power regressions on the Linux 3.1 or 3.0 kernels, but the Active-State Power Management change in the Linux 2.6.38 kernel is still causing this mobile beast to have its power rate elevated by 29%.

The Linux power regression for the Intel Sandy Bridge notebook on the Linux 3.1 kernel is still being investigated and so stay tuned for updates. Live updates on the research are also often shared via Twitter.

About The Author
Michael Larabel is the principal author of Phoronix.com and founded the web-site in 2004 with a focus on enriching the Linux hardware experience and being the largest web-site devoted to Linux hardware reviews, particularly for products relevant to Linux gamers and enthusiasts but also commonly reviewing servers/workstations and embedded Linux devices. Michael has written more than 10,000 articles covering the state of Linux hardware support, Linux performance, graphics hardware drivers, and other topics. Michael is also the lead developer of the Phoronix Test Suite, Phoromatic, and OpenBenchmarking.org automated testing software. He can be followed via and or contacted via .
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