It's a long sad story. I'm on a thinkpad W530 with Intel graphics & proprietary driver running Fedora 28 KDE. When I put my perfectly running laptop into the docking station with two external monitors, the monitors go crazy. My system decides that because one of the monitors offers one screen resolution at UHD, that it should take that one at the highest resolution at 120Hz refresh, which is the refresh rate offered for 1080i resolution. It also decides that the best refresh rate for my laptop is >> than 60 Hz, probably 120Hz. So, right away there's two monitors I can't use. The third one it tends to lock up.

When I yank the laptop out of the dock, sometimes the laptop will go back to being usable, but sometimes, the screen's off at 120Hz refresh rate. A reboot fixes it so far. I killed KScreen2 and manually configure now.

Here's the problem: When I first upgraded from Fedora 26 to 28, the screen resolution control would detect the change in monitors and ask if I would like to run a screen configuration program. It doesn't do that anymore. It just changes things without asking. This is the central bug. Somehow, asking permission to change things has stopped. If that were still there, I suspect I would be doing much better. Secondarily, the preferred modes for the monitors are all wrong.

So, I need to submit a bug report to KDE on this. What are the points I have to hit?