Comment # 2
on bug 111482
from Andrew Sheldon
I have the same problem, but with the MSI Evoke 5700 XT. If you read /sys/class/drm/card0/device/pp_dpm_mclk you should find that it's forced to the highest state (3: 875Mhz) and that although it lets you set a lower value, it immediately jumps back to the maximum value. In theory, this problem should have been fixed with b90053edc9d6d639ddb600f8799d990d92aca328 in amd-staging-drm-next: drm/amd/display: Support uclk switching for DCN2 but it doesn't seem to fix the problem for me. Before this, you could revert the old workaround: 02316e963a5a drm/amd/display: Force uclk to max for every state" and you could manually set mclk. I should note that from some brief tests on Windows, the card also seem to be stuck at maximum mclk (it's actually even worse since temperature readings don't even work there). So it could be that aftermarket cards need some extra work, in order to work properly. System: Mesa git amd-staging-drm-next (also tested 5.3-rcX and drm-next-5.4)
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