Bug#1114766: Processed: Secondary monitor shows mouse cursor but nothing else

[Peter Müller]

Slightly off-topic, but might be good to know:

Connecting both the BenQ monitor (with a DVI cable) and the Philips monitor 
(via a DisplayPort cable) to the same PCIe card (NVIDIA PΛLiΤ GeForce GTX 1660) 
works around the original problem (so now both monitors show proper contents in 
the Join mode, and I can move windows between them). However, I don't hear 
sound from the speakers of the Philips monitor this way.