AMD Radeon FreeBSD Support Continues Advancing
Written by Michael Larabel in AMD on 27 September 2013 at 12:02 AM EDT. 3 Comments
AMD Radeon KMS support landed into FreeBSD 10 last month, but the developer -- who has been working on this code in part by financing from the FreeBSD Foundation -- is continuing to make improvements to the open-source AMD graphics code ported to FreeBSD from Linux.

The latest news update from the middle of September on the AMD GPU FreeBSD Wiki is that there's a video BIOS mapping bug that's being addressed, suspend/resume support is slowly but surely getting into a working state, and there's a new AMD Radeon KMS Git branch.

The features of this new AMD Radeon KMS code branch is for providing multiple graphics card support on FreeBSD -- DRM drivers communicating with multiple GPUs either for display or render purposes. This branch also has setmaster/dropmaster support to allow for multiple X.Org Servers to run concurrently.

The code that this FreeBSD AMD code is being based upon is still derived from around the Linux 3.8 kernel with some TTM memory management bits from Linux 3.9.

The news update on the Wiki ended with, "We're now much closer but there's still a long way to go."

This initial AMD Radeon KMS driver support will be present in FreeBSD 10, which is currently in an alpha state, while Intel KMS/DRM support has been present since FreeBSD 9.1.

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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 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 automated benchmarking software. He can be followed via Twitter or contacted via

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