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Radeon Gets Multi-Screen Reverse Optimus Support

AMD

Published on 30 July 2013 11:45 AM EDT
Written by Michael Larabel in AMD
14 Comments

Hours after David Airlie posted a new Nouveau X.Org driver with "multi-screen reverse Optimus" support, AMD's Alex Deucher ported the code to the open-source Radeon driver.

Published on the Radeon driver mailing list this morning is AMD's support for multi-screen reverse Optimus. Like the Nouveau code talked about earlier, this support is for allowing multiple screens to be powered in a reverse Optimus configuration: where the dedicated GPU is driving multiple displays but the rendering is being powered by the integrated GPU (generally, Intel graphics). There's a new X.Org Server interface to allow for multiple outputs on the dedicated GPU with the integrated GPU being responsible for the rendering.

With the port from the Nouveau code and taking advantage of a new X.Org Server interface, the code to the xf86-video-ati DDX is less than 100 lines. The two patches for the Radeon support can be found on the xorg-driver-ati mailing list.

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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