Hello Alexey and landing.st,
for me updating the drivers instantly solved the problems. Sorry, that was an embarrassingly simple solution.
However, I still sometimes get a black screen, which I can get rid of it by changing to stereo view (and back). But some graphics remain funny: markers would still appear as black boxes and the overlay number of points is not readable. This can be fixed by re-booting, so no big deal, just fyi.