I just tried recent kernel 5.4-rc1+ from here: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git It supposedly already has fixes for amdgpu metrics, in this commit: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=0f83eb8888690d77f76d27d803488c1047fc9a10 However I just experienced another hang when adding amdgpu fans sensors to ksysguard, so apparently it didn't fix the problem. And there was also a hang with Firefox, when it was started without AMD_DEBUG=nodma, so that issue is not fixed either yet. cc Alex Deucher.