Enable CONFIG_DRM_LOAD_EDID_FIRMWARE=y
https://forum.armbian.com/topic/14167-4k-hdmi-output/?do=findComment&comment=104990
config change doesn't solve issue as “connector” did is associated with is different than what xrandr see. We should still apply change
This is still unresolved, right?
yeah still unresolved for me, although the “fix” we did apply to the kernel to allow EDID_FIRMWARE can be considered its own enhancement. I think I'll actually re-write this a bit, close and create a new one for the 4k issue.