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AMD GPUs are cursed for me
(lemmy.world)
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this post was submitted on 02 Feb 2024
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Over DisplayPort? That's interesting, I knew AMD can't do HDMI 2.0 but there shouldn't be a problem with DP.
Might wanna try a proper new certified DP 2.1 cable, just to be safe.
I "only" drive a AW3423DW but no issues at 3440x1440 with 165Hz.
Indeed over DP. It works fine at 240Hz in Windows, but of course the graphics quality in games is not as good as with nvidia.
Anything interesting going on in the kernel log while connection doesn't work?
If so, you could maybe write a bug report at the amdgpu repo.
One thing I could imagine that is happening is that Linux chooses a higher chroma subsampling than on Windows. Had that issue before with a monitor that had a wrong EDID. Unfortunately it's a real pain to set the chroma subsampling on Linux with AMD.