Improving Open-Source ATI Power Management
Written by Michael Larabel in Red Hat on 18 November 2008 at 05:55 PM EST. 3 Comments
Red Hat's Matthew Garrett has chronicled his AtomBIOS hacking adventures on his blog that has led to aggressive power management capabilities. By using an AtomBIOS program written by Jerome Glisse to manipulate the clock frequencies, the previously-published R500 documentation, and coding, and he managed to save 10 Watts of power with a Radeon X1300. His yet-to-be-merged DRM code down-clocks the memory frequency automatically when the screen is idle and GPU core down-clocking. Matthew has published this code in his own git repository for early testers.

Also in the power management realm, earlier this year there was R500+ Dynamic Clocks support added to the open-source ATI driver.

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Michael Larabel is the principal author of Phoronix.com and founded the site in 2004 with a focus on enriching the Linux hardware experience. Michael has written more than 10,000 articles covering the state of Linux hardware support, Linux performance, graphics drivers, and other topics. Michael is also the lead developer of the Phoronix Test Suite, Phoromatic, and OpenBenchmarking.org automated benchmarking software. He can be followed via Twitter or contacted via MichaelLarabel.com.

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