Hi,

i am on updated KDE 18.10, Nvidia 396

i have three monitors and everytime after boot and login one of them is black, no desktop background, no right click possible. But i can draw a window to it.
When i logout or kill plasmashell, everything is fine again.

Any Tips for this ?

Perhaps you can see what happens if you disconnect the two screens that work before login. Then, if possible to login on the third screen (the one that goes black after login with three screens connected), try reconnecting the other two to see if the system can recognize all three. After that see if all screens work after a reboot.

The system is recognizing all three screens before login, the problem occurs after login. And if i relogin or kill plasma, the screens are working fine.
So its a plasma problem.
The last days i had no problems. Now i sit here with one black screen at my right side. Sometimes that could also be the left one.
So i see no sense in pulling the cable, but thank you