Comment # 86 on bug 1177428 from Karl Mistelberger

(In reply to Takashi Iwai from comment #85)
> OK, then please report and track the bug on the upstream bug tracker, e.g.
> the gitlab.freedesktop.org issues.  The package bug must have been fixed, so
> the rest is pure the driver or the firmware bug, which we can't help much
> from distro side.

I did so: https://gitlab.freedesktop.org/drm/amd/-/issues/1354

However this morning I found suspend/resume doesn't work anymore with the old
monitor. It worked with firmware in
http://download.opensuse.org/update/tumbleweed/, but that's now gone and
http://download.opensuse.org/tumbleweed/repo/oss/ is now used:

3400G:~ # zypper se -is kernel-firmware-amdgpu
Loading repository data...
Reading installed packages...

S  | Name                   | Type    | Version      | Arch   | Repository
---+------------------------+---------+--------------+--------+--------------------------------
i+ | kernel-firmware-amdgpu | package | 20201005-3.1 | noarch |
Hauptaktualisierungs-Repository
3400G:~ #