1) 'Unify outputs' does not unify anything. It does nothing. The second screen (a projector) still shows the second screen. I have to split them again and set both to the same resolution manually and move one over the other to be at the same coordinates (0,0). Then I have a "clone" setup. 2) setting primary display does not work. I have to set one, the other, and "none" several times to have the desired setup. And sometimes kill and restart plasmashell to really have main panel on the primary display. All this worked with KDE 4 quite nicely, so this is a regression. What more should I dump? Reproducible: Always
Created attachment 95085 [details] one of ~/.local/share/kscreen/ files which I set manually
We've fixed a whole bunch of issues that could lead to this behaviour. Could you re-test with Plasma 5.8, and if this problem persists, reopen this bugreport and attach ~/.local/share/kscreen/kscreen.log after reproducing the problem?