I have four monitors connected to my workstation. One in landscape mode straight ahead, one more like that above it, and one in portrait mode on each side.
I've used the Displays control panel to position the screens relative to each other, but that only kind of works. I can't drag the screens freely as I want. Instead they snap together in mysterious ways. Right now, my left screen and my lower middle screen are flush together. Then there is a gap of a couple of centimeters to the right screen. The top screen is flush against the top part of the right screen. No matter how I drag can I get the right screen and the middle screen to be adjacent. Also, I fail to place the top screen (which is slightly smaller) centered above the lower screen; it is always stuck to the right screen.
Also, I don't understand what the black area on the lower middle screen is supposed to represent (see the image attached).
Thank you for taking the time to report this bug and helping to make Ubuntu better. The issue you are reporting is an upstream one and it would be nice if somebody having it could send the bug to the developers of the software by following the instructions at https:/