AMDGPU In Linux 4.9 To Bring Virtual Display Support, Improved GPU Reset

Written by Michael Larabel in Radeon on 24 August 2016 at 07:37 PM EDT. 18 Comments
The first pull request has been submitted of new Radeon and AMDGPU DRM driver updates to be queued in DRM-Next for landing with the Linux 4.9 kernel.

To look forward to Linux 4.9 even though Linux 4.8 is still weeks from being released is PowerPlay support for Iceland GPUs, improved GPU reset, UVD and VCE power-gating for Carrizo and Stoney, support for pre-initialized vRAM buffers, TTM clean-ups, virtual display support, and other low-level changes. Many bug fixes also present.

The AMDGPU virtual display support is useful and we have been looking forward to it. GPU reset improvements are also welcome for better recovery when the GPU becomes hung. As is the case lately, most of these changes are focused around the newer AMDGPU DRM driver over the mature Radeon DRM code.

Notably absent from this initial pull request is GCN 1.0 / Southern Islands AMDGPU support... It was looking like the code would be ready to merge soon, but it appears quite not yet. Hopefully it will still come to Linux 4.9 with a later pull request as an experimental feature.

You can see the dozens of changes part of this initial Radeon/AMDGPU Linux 4.9 DRM-Next pull request via this email message.

Update: Another missing feature worth mentioning is no DAL support yet either in this PR. DAL is needed for FreeSync, Polaris audio support, and other display features.
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Michael Larabel is the principal author of and founded the site in 2004 with a focus on enriching the Linux hardware experience. Michael has written more than 20,000 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 automated benchmarking software. He can be followed via Twitter, LinkedIn, or contacted via

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