Comment 15 for bug 1573345

I have this problem. Everything works great with my two monitor setup until my screen blanker comes on. After I wake the system (which my secondary monitor seems to wake up a couple of seconds faster) when I click the application launcher, the screen opens up on my secondary monitor. All windows I open show up on the secondary monitor. If I log out and in that will fix the issue and things will open on the correct monitor.

Nivdia driver 410.78 Nvidia 2080 video card.
Primary monitor: Dell AW3418DW on display port. 3440x1440 resolution
Secondary monitor: Dell 2407WFP on HDMI 1920x1200 resolution

Operating System: Kubuntu 18.10
KDE Plasma Version: 5.14.4
Qt Version: 5.11.1
KDE Frameworks Version: 5.52.0
Kernel Version: 4.18.0-12-generic
OS Type: 64-bit
Processors: 16 × AMD Ryzen 7 1800X Eight-Core Processor
Memory: 31.4 GiB of RAM

This is reproducible every time.