Why stays the window of the movie player black?
This can happen if the movie playback is already started and after that you turn on TV mode. Then the see the desktop normally but the window of the movie is black. Solution: Stop and start the movie again.
The reason for this behaviour is the resolution change which is performed when the TV mode is turned on. Overlay windows have to be initialized again after a change, but most players don´t do that correctly. Only the restart of the playback forces the players to do it.
Taget fra TVTools FAQ. Prøv at lukke tvtools og start op igen.