dumb sh*t - i also updated desktop video to double check. what i hadn't realized that somewhere in the process my resolve preference had defaulted to none rather than my intensity pro.
maybe i'm just getting too old for all this...
actually, this from dwaine in another post is what i did without knowing
Resolve Preferences - System - Video and Audio I/O - that you see the Mini Monitor card available (in my case intensity pro) to be selected, and that it is selected? Assuming it is selected, select None, save the prefs and restart Resolve, then select the Mini Monitor again, save the prefs and restart Resolve