Setup:
Debian (latest), running Xmonad as tiling WM, and Cinnamon for decorations. 2 Monitor setup. Intel graphics. Have an Nvidia card, but not sure if enabled.
Logging into Screen is fine, but once I join a meeting, one of my screens goes black.
I see the "Connecting" widget in the bottom right, and as soon as it connects, one of the is when one of my screens goes black.
The black screen follows my mouse - so if I go to the left, it's on my left monitor, if I go to the right it goes to my right monitor.
Since I started the process on a terminal, I can ctrl+c to exit.
I tried to xprop the black screen, but only got information on the window underneath.
Happy to provide more information as required!