X.Org Server 1.20 Breaks The Video Driver ABI
Written by Michael Larabel in X.Org on 12 February 2017 at 07:36 AM EST. 25 Comments
X.ORG --
Just a quick note for anyone who routinely builds the latest X.Org Server from Git, the video driver ABI has been broken again, thus you'll need to rebuild your dependent DDX drivers assuming they have been modified for this new ABI.

The recent changes that landed in xorg-server Git around handling hardware cursor failure have ended up changing the video driver ABI. The video ABI is now up to v24.


It's not too uncommon to see the video driver ABI break at least once each cycle, just important to note for those fetching their code from Git and/or the rolling release distributions that tend to ship new server updates quickly ahead of potentially new X.Org DDX video driver releases by all of the smaller drivers that may have not been updated with support for the new ABI.

It's also a bit less of a headache these days now that AMD has migrated to the AMDGPU-PRO stack that makes use of the xf86-video-amdgpu DDX rather than during the fglrx/Catalyst days where the company was notorious for waiting months in some instances after a new X.Org Server was released before supporting the new ABI. With the NVIDIA Linux driver team they continue to support the new driver ABIs usually right around release time or earlier, once the new ABI version has proven it won't change again pre-release.

So far there hasn't been too much new code going into Git for X.Org Server 1.20. No firm release schedule has yet to be formally communicated but it will hopefully be out later in the year. There's been some XWayland work, some minor RandR / XFree86 / GLAMOR / Xi code changes, some test case updates, and other minor changes. So far there's been less than 100 changes compared to X.Org Server 1.19 from three months ago.
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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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