I can't play DVDs - I had the message that:
drive region settings do not allow access to this disk
Then I was told by the support center of fluendo this:
Most probably you DVD drive is set to work in a region different than the region of your discs. In the preferences menu you can change the region of your drive so it matches your discs. Be warned that drives can only change their region a limited amount of times.
Now the DVD starts, I hear the sound, but there is no graphics at all and I can't stop the program not even with "esc"