This appears to be the associated bug report in drm.
https://gitlab.freedesktop.org/drm/amd/-/issues/662
** Bug watch added: gitlab.freedesktop.org/drm/amd/-/issues #662
https://gitlab.freedesktop.org/drm/amd/-/issues/662
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This bug continues to be present in focal, with no effect from updated
kernel. It constantly cycles with xrandr repeatedly emitting that the
configuration has changed when monitors go to power saving mode, causing
wake-up. This cycle eventually crashes the kde lockscreen (probably a
separate bug),
