Another thing that might help in triage is as per the workaround specified,
Changing screen position (in a 2 monitor setup: laptop + HD TV(via HDMI) ) corrects the problem,
Important thing to note is that you can use [ nvidia-x-server-settings ] or [ gnome program: Displays] to do it, in either case as soon as I click 'apply' the black border issue is corrected.
i.e. [ 'change position of either screen' -> 'click apply' -> screens blackout -> screens re-appear -> revert to previous configuration (or not) -> black borders gone ]
Another thing that might help in triage is as per the workaround specified,
Changing screen position (in a 2 monitor setup: laptop + HD TV(via HDMI) ) corrects the problem, x-server- settings ] or [ gnome program: Displays] to do it, in either case as soon as I click 'apply' the black border issue is corrected.
Important thing to note is that you can use [ nvidia-
i.e. [ 'change position of either screen' -> 'click apply' -> screens blackout -> screens re-appear -> revert to previous configuration (or not) -> black borders gone ]