Comment 2 for bug 1874325

This series of patches broke:

https://bugs.launchpad.net/ubuntu/+source/linux-meta-hwe/+bug/1880041/comments/19

Commit
drm/amdgpu: fix gfx hang during suspend with video playback (v2)

https://kernel.ubuntu.com/git/ubuntu/ubuntu-bionic.git/commit/?id=6ad2b975986441870a9a67051f9571b5c09c2569

has a known issue and already has a fix in upstream:
https://gitlab.freedesktop.org/drm/amd/-/issues/1094

However this fix has not been backported to 18.04 LTS HWE, thus leaving Ryzen systems with integrated GPUs unable to shutdown or reboot.