I noted the problem the first time a year ago for the x org mode. In wayland the problem is not present.
Description of problem:
Under Xorg mode Gnome becomes unusable when I want to have operate one display in portrait mode and two others in landscape mode.
Version-Release number of selected component (if applicable):
I have one displayport screen (resolution 1920*1080) and 2 hdmi screens (resolution 1920*1080; 1600*900). Whenever I use gnome settings to move the hdmi 1600*900 sceen into portrait mode, the overall display gets distorted - the cursor is not in sync with what is shown.
Steps to Reproduce:
1. connect three displays with different resolutions, configured in landscape mode.
2. put one in portrait mode.
Some part of the overall display will be "distorted". In that distorted part when I click the cursor on a visible point (say a button), then that button does not get clicked.
the cursor should know where it is...