You are not logged in.
On my last system update I experienced a problem with my nvidia geforce 210 dual monitor setup.
Using sddm, I was able to determine that the dual monitor was working properly on the login screen.
The problem occurs upon login into plasma:
Any previously configured dual-monitor setup was reset and the monitors must be reset via Kde "Display Configuration".
I downgraded kscreen from the latest 5.6.1 to 5.5.5, and the problem was fixed after a reboot.
Posting this here in case anyone else runs into this problem.
Regards!
Offline