Now the upstream submitted a more proper fix: https://lore.kernel.org/amd-gfx/20210512101850.1466-1-christian.koenig@amd.com/ I'm re-building a test kernel with this patch, which will be available later in the same repo, OBS home:tiwai:bsc1185516. The kernel should be 5.12.3-*..gfbf3b4b. Could you give it a try later and report back whether this works?