Graphics Leftovers
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Intel Graphics Driver Developers Begin Eyeing The Linux 4.18 Kernel
The Linux 4.16 kernel is at least two or three weeks out from being released, but Intel has already submitted their i915 DRM driver feature changes for Linux 4.17 and are now beginning to think about their feature changes for Linux 4.18.
Intel's feature changes for Linux 4.17 are now staged in DRM-Next with hitting that soft cutoff deadline ahead of the next kernel cycle. Intel Direct Rendering Manager updates for Linux 4.17 include Cannonlake "Gen 10" graphics now being considered stable, the very early bits of Icelake "Gen 11" support, and a lot of low-level code improvements. To little surprise, Linux 4.17 is looking like another exciting cycle on the feature/improvement front.
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Intel BayTrail Gets Minor Graphics Improvement On Coreboot, Now Supports OpRegion
While there doesn't appear to be too many Intel BayTrail users out there running systems with Coreboot, this generation of hardware that's been a bit notorious with Linux users due to varying issues can now find at least a bit better graphics support with the latest Coreboot code.
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Mesa 18.0 Is Now Primed For Releasing Soon
Mesa 18.0's delay of more than one month and without any new release candidate came while the open-source Intel developers were hunkered down to clear the remaining blocker bugs.
Fortunately, it appears the remaining Mesa 18.0 blocker bugs are now resolved, meaning the official release could come in a matter of days depending if they decide to first do a Mesa 18.0-rc5 release for last minute testing.
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Mir Devs Are Still Working On An Example Mir Desktop Session For Ubuntu 18.04
While Ubuntu 18.04 LTS "Bionic Beaver" is just one month away from release, the developers working on the Mir display server code are still working to get an example desktop session into this release.
Details remain light but in writing yesterday about changes the UBports' team needs to make for Ubuntu 18.04 LTS support, longtime Mir developer Alan Griffiths commented, "The Mir team is aiming to have the necessary tweaks in place for the 18.04 release along with an example "Mir" desktop session." The tweaks needed for Mir in Ubuntu 18.04 are not using Mir-on-Mir and client applications using libmirclient cannot be using EGL otherwise only software-based rendering will work.
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Mesa 18.0 Has Been Off The Tracks For More Than One Month
Mesa 18.0 had been due for release around mid-February, but that didn't happen and there hasn't even been a release candidate in more than one month.
Mesa 18.0-RC4 was released back on 9 February and since then there hasn't been an RC5 or a new release.
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Uniform Packing For RadeonSI NIR, Helps Reduce CPU Overhead
Timothy Arceri of Valve's open-source Linux GPU driver team is out with his latest set of patches to further enhance the RadeonSI Gallium3D driver.
Timothy's latest objective remains with improving the RadeonSI NIR back-end for using this modern intermediate representation alternative to Gallium3D TGSI. NIR is important for getting the OpenGL 4.6 bits in place with SPIR-V ingestion / better interoperability with the RADV Vulkan driver and the already-written code paths using NIR.
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Supporting virtual reality displays in Linux
At linux.conf.au (LCA) 2017 in Hobart, Tasmania, Keith Packard talked with kernel graphics maintainer Dave Airlie about how virtual reality devices should be hooked up to Linux. They both thought it would be pretty straightforward to do, so it would "only take a few weeks", but Packard knew "in reality it would take a lot longer". In a talk at LCA 2018 in Sydney, Packard reported back on the progress he has made; most of it is now in the upstream kernel.
Packard has been consulting for Valve, which is a game technology company, to add support for head-mounted displays to Linux. Those displays have an inertial measurement unit (IMU) for position and orientation tracking and a display with some optics. The display is about 2Kx1K pixels in the hardware he is working with; that is split in half for each eye. The displays also have a "bunch of lenses", which makes them "more complicated than you would hope".
The display is meant to block out the real world and to make users believe they inhabit the virtual reality. "It's great if you want to stumble into walls, chairs, and tables." Nearly all of the audience indicated they had used a virtual reality headset, leading Packard to hyperbolically proclaim that he is the last person in the universe to obtain one.
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