Graphics: Digital Restrictions (DRM) in Weston/Wayland, DXVK, Valve, NVIDIA, Mesa and AMD
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Weston 8.0 Released With DRM HDCP Support, EGL Partial Updates, Headless OpenGL
Highlights of Weston 8.0 include better DRM hardware planes support, HDCP content protection in conjunction with the DRM kernel driver back-end, headless OpenGL support, EGL_KHR_partial_update support for allowing partial screen updates for better efficiency with drivers supporting this EGL extension, the direct display extension, a memory optimization, and various other changes.
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DXVK 1.5.2 Released With Many Game Fixes
Coming a few weeks past DXVK 1.5.1 is now version 1.5.2 and it brings with it quite a number of improvements.
First of all, DXVK 1.5.2 now targets the Vulkan 1.1 graphics API (not to be confused with Vulkan 1.2 that was just released). In requiring Vulkan 1.1, the graphics driver requirements are slightly elevated but still not bad at all as late 2017 Mesa drivers and newer are fine and the NVIDIA 390 series or newer. Nearly all Linux gamers should be set with their current drivers unless running quite an outdated distribution.
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Valve's ACO Shader Compiler Back-End For Radeon Vulkan Is Now In Good Shape For GCN 1.0
As last minute material for Mesa 20.0 is making Valve's "ACO" AMD compiler back-end for the RADV Vulkan driver in better shape for GFX6/GCN1.0 graphics hardware.
Enabling RADV ACO, which was mainlined in Mesa 19.3, can shorten Vulkan shader compiler times and help with overall gaming performance. The results have been compelling and initially was focused on the very recent AMD Radeon graphics cards.
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NVIDIA Contributes Much Less To The Linux Kernel Than Intel Or AMD
Yesterday I put together some statistics on the AMD vs. Intel contributions to the upstream Linux kernel during the 2010s, but a request coming in off that was how do NVIDIA's contributions compare. Here is a look at the NVIDIA contributions to the Linux kernel over the past decade.
Obviously NVIDIA's contributions are much less given they are primarily focused on a proprietary graphics driver stack compared to Intel and AMD with their Direct Rendering Manager drivers within the Linux kernel. But NVIDIA does contribute to the Linux kernel: they ultimately upstream their Tegra SoC support and other bits where it makes business sense. While they do not contribute much right now to open-source desktop graphics, they do contribute more to Nouveau where it concerns the Tegra graphics.
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Nsight Graphics 2020.1 Released With Profiling For Vulkan+OpenGL Interop
NVIDIA on Thursday introduced Nsight Graphics 2020.1 that to its profiling support can now handle OpenGL + Vulkan interoperability for games/applications making use of both APIs. While not many game engines / apps are yet using the likes of OpenGL 4.6 ARB_gl_spirv, Nsight is ready.
Beyond profiling support for Vulkan+OpenGL interop, there are other profiling improvements, the Nsight Aftermath SDK is added for generating GPU mini-dumps with DirectX 12 software, and support for new Vulkan extensions. On the Vulkan side is now shader clock support, SPIR-V 1.4, and shader subgroup extended types.
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Mesa 20.0 Now Defaults To The New Intel Gallium3D Driver For Faster OpenGL
After missing their original target of transitioning to Intel Gallium3D by default for Mesa 19.3 as the preferred OpenGL Linux driver on Intel graphics hardware, this milestone has now been reached for Mesa 20.0!
We've known that the revised Intel goal was Mesa 20.0 but that change-over was looking less likely especially with Mesa 20.0 entering feature freeze next week, but just in time the default change-over from i965 to Iris Gallium3D has happened.
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Intel's OpenSWR Rasterizer Starts Seeing Tessellation Support
OpenSWR is Intel's software rasterizer driver developed within Mesa as an alternative to Gallium3D's LLVMpipe and the slow Softpipe. OpenSWR is designed for delivering good CPU-based OpenGL graphics performance designed for visualization software running on workstations to HPC clusters. Like LLVMpipe, OpenSWR employs LLVM for some of its CPU optimizations.
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AMD Ryzen 4000 Mobile Series "Renoir" Graphics No Longer Experimental With Linux 5.5
While the Linux 5.5 kernel is expected to be released as soon as this Sunday, a last minute change to the AMDGPU DRM driver makes the Renoir graphics no longer treated as experimental. With that, there is open-source support out-of-the-box rather than being hidden behind a kernel module flag.
AMD has been working on the Renoir support for Linux going back to the end of last summer. Renoir was sent in for the Linux 5.4 kernel but initially treated as "experimental" support while now at the end of the Linux 5.5 cycle it's no longer treated as experimental.
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Disable Nvidia GPU on the Thinkpad T490
I wrote about installing Linux on the Lenovo ThinkPad T490 last month and one of the biggest challenges was getting graphics working properly. The T490 comes with an option where you can get a discrete Nvidia MX250 GPU and it packs plenty of power in a small footprint.
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