AMD: Experimental "ShadowPrimary" Acceleration
Written by Michael Larabel in AMD on 1 June 2012 at 10:57 AM EDT. Add A Comment
Hidden away within the new Catalyst 12.6 Linux driver are 2D acceleration improvements. These improvements aren't visible by default but there's a special command to activate this "ShadowPrimary" support.

AMD hasn't publicly talked about this new means of 2D acceleration or even privately explained what's all changed. Though from the sounds of it, it's basically like using ShadowFB with Catalyst. For the primary frame-buffer, it's using a shadow frame-buffer with the CPU.

Enabling this 2D improvement can be done by running aticonfig --set-pcs-u32=DDX,ShadowPrimary,1. Run at your own risk.
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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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