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HDR and color management in KWin, part 3 (May 11)
(zamundaaa.github.io)
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this post was submitted on 25 Jun 2024
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It maps the colors to be more correct, and it does use the brightness info from the EDID for HDR content, so that checks out.
It might enable some sort of gamut mapping on the display side... HDR on monitors is really weird sometimes.
I think that's a bug in amdgpu. It should force a modeset on hdr change, but it doesn't.