PsychHDR, PsychImaging: Note cancelled support for pre-Navi gpu's in …

…AMDVLK. The AMDVLK team at AMD decided in a rather customer hostile move to already cancel support for pre-Navi gpu's like Polaris, Vega, and likely AMD Ryzen iGPU's with Vega graphics cores, e.g., Raven Ridge, for all AMDVLK driver releases after 2023-Q3.3 in September 2023. Later versions from October 2023 onwards only support AMD Navi and later with RDNA graphics architecture. Sad for us, as AMDVLK is currently needed for high > 8 bpc color precision framebuffers of 10 bpc, 16 bpc and floating point 16, as well as for HDR.
kleinerm · Oct 27, 2023 · cd9e1a0 · cd9e1a0
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diff --git a/Psychtoolbox/PsychGLImageProcessing/PsychHDR.m b/Psychtoolbox/PsychGLImageProcessing/PsychHDR.m
@@ -21,8 +21,12 @@
 % - Modern AMD graphics cards (like above) under modern GNU/Linux (Ubuntu 18.04.4-LTS
 %   at a minimum (untested!), or better Ubuntu 20.04-LTS and later recommended), with
 %   the AMD open-source Vulkan driver "amdvlk". Install driver release 2020-Q3.5 from
-%   September 2020, which was tested, or any later versions. The following webpage has
-%   amdvlk download and installation instructions:
+%   September 2020, which was tested, or any later versions. Note that release
+%   2023-Q3.3 from September 2023 was the last release to support pre-Navi gpu's like
+%   Polaris and Vega. Later versions only support AMD Navi and later with RDNA graphics
+%   architecture.
+%
+%   The following webpage has amdvlk download and installation instructions:
 %
 %   https://github.com/GPUOpen-Drivers/AMDVLK/releases
 %

diff --git a/Psychtoolbox/PsychGLImageProcessing/PsychImaging.m b/Psychtoolbox/PsychGLImageProcessing/PsychImaging.m
@@ -890,6 +890,9 @@
 %      https://github.com/GPUOpen-Drivers/AMDVLK/releases
 %
 %      Driver release v-2021.Q4.1 or later from November 2021 is required to support this feature.
+%      Note that release 2023-Q3.3 from September 2023 was the last release to support pre-Navi
+%      gpu's like Polaris and Vega. Later versions only support AMD Navi and later with RDNA
+%      graphics architecture.
 %
 %   2. You will need to install Linux kernel 5.14, which is currently not shipping in any Ubuntu release,
 %      as of November 2021. A way to manually install it on Ubuntu 20.04-LTS is described on the following