Open-Source AMD Iceland/Topaz Support No Longer Considered Experimental
Written by Michael Larabel in AMD on 2 February 2016 at 05:56 PM EST. 24 Comments
AMD --
The AMDGPU DRM driver support for Iceland (Topaz) graphics processors is now considered stable with the experimental flag set to be removed.

Last year AMD marked the Iceland support as experimental due to not having tested the new GPUs much and some bugs were coming in regarding the AMDGPU DRM driver's support for the mobile GPUs.

Fast forward to today, Alex Deucher posted a series of eight AMDGPU patches for Iceland/Topaz and at the end they remove the experimental support flag. Thus the hardware-accelerated open-source support will now be available without the amdgpu.exp_hw_support=1 kernel module parameter. The fixes done prior to re-enabling the out-of-the-box graphics support appear to be mainly related to the firmware handling for this family of graphics processors.

Unless this patch series gets sent in today as "fixes" for Linux 4.5, this experimental support flag won't be removed until Linux 4.6.

Iceland/Topaz is found in the Radeon R5 M255 and R7 M260 mobile graphics processors. The PCI IDs listed by this family of GPUs are 0x6900, 0x6901, 0x6902, 0x6903, and 0x6907.
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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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