i'm using dual monitor setup on 11.3 and kde but it's quite difficult
1. i have a dual monitor setup on. then i turn off the laptop and take it home. i turn it on again with only internal monitor. Now how can I turn off the second monitor? kde still thinks it still there (you can move the mouse out of screen, new windows can appear on the "detached" monitor). But in the control panel it's grayed off so it can't be turned off. Any solution?
2. Also when switching between monitor setups, the panels get lost sometimes. Also auto hide feature stop working. When i remove the panel and recreate it, it works again. I'm using two different dual monitor setups and it obviously confuses kde. Can i create some presets or something?