https://bugs.freedesktop.org/show_bug.cgi?id=98324
--- Comment #2 from Darren Salt bugspam@moreofthesa.me.uk --- Currently running amd-staging-drm-next 0313e8bfbbdd. The behaviour is now improved, though is still regressed vs. mainline.
Unblanking works. If I allow the problem monitor to display “no signal”, it becomes effectively disconnected, and becomes reconnected (as if physically freshly connected) on unblanking.