Comment # 2 on bug 108020 from Nicholas Kazlauskas

This is likely fixed. It may be worth testing the amd-staging-drm-next kernel
from:

https://cgit.freedesktop.org/~agd5f/linux/

or applying the proposed patch from the bug report at:

https://bugzilla.kernel.org/show_bug.cgi?id=201067

Please let me know if you're seeing an issue with either of these.