I've been looking for a solution to this, but I cannot seem to find anyone who has solved it (or even have the exact same problem).
My problem is that "Show black screen" option when connecting to a client doesn't work. "Disable remote imput" works, though. But the remote screen simply doesn't go blank.
I tried enabling the "Enable black screen option in the settings on the teamviewer "server", but when I did that the client couldn't even connect - it got stuck on "Initializing display parameters" forever.
Since I'm trying the free version of TW before buying, there also is absolutey no help to get from the TW team.
Anyone got any suggestions?
I've installed and reinstalled the TW monitor drivers on both the local and the remote computer, but it doesn't even seem to ATTEMPT to black the remote screen.
UPDATE: When connecting from Computer1 to Computer2, it doesn't work (as described above). However, when connecting from Computer2 to Computer1, it works.
So the problem seems to be with TW and the display drivers on Computer1.