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Improving Open-Source ATI Power Management

Red Hat

Published on 18 November 2008 05:55 PM EST
Written by Michael Larabel in Red Hat
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.

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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