When Plasma session starts resolution is set to 1024x768 on my external DP screen (recommended is 1024x768). Also if LVDS is also on, it's resolution is also set to 1024x768. Reproducible: Always Steps to Reproduce: Boot plasma when DP screen (LA1905wg) is attached. Actual Results: 1024x768 resolution is used Expected Results: Preferred resolution is used.
Created attachment 89583 [details] kscreen-console (only external)
Created attachment 89584 [details] kscreen-console (both screens enabled)
Could you delete config files in ~/.local/share/kscreen/ and set up your screen configuration again? There were some regressions in previous version of KScreen that might have caused it to create a corrupted config file.
Oh, sorry. I forgot to close it. I think it was solved with Plasma 5.2. Now correct resolutions is selected.