I was expecting to have the panel and menus moving to the primary screen once I change it in the display settings, at least this was the behavior some versions ago. Now it doesn't matter the screen I choose for primary... because it will be always the laptop's one. Reproducible: Always Expected Results: Move the panl to the primary screen
I have tried to logout and login again and now I have the proper primary screen. Also I can now change it and it's behaving correctly. Altough If I restart the computer the primary screen goes back to the laptop and changing the primary screen don't change anything.
This bug is most likely fixed in Plasma 5.7, can you give the beta a try?
I will try once I have packages on Fedora, since this is my working system I cannot afford to do much experiences that could sacrifice stability.
As Plasma 5.7 has been released now, please give it a try. You can also try with the help of a live image such as KDE Neon (https://neon.kde.org/ ).
Created attachment 100006 [details] boot log via journalctl -b
I am running plasma 5.7 and I have the same issue. Cairo Dock knows which display is the primary display, and the display configuration program shows the primary display correctly but the wallpapers and panel default to the laptop monitor always being the primary. Now, if I go into the display configuration and switch my primary display from the external monitor to laptop monitor Cairo Dock will switch screens (this is good, tells me Cairo Dock isn't broken) then I switch back to the external monitor being the primary display the wallpapers switch screens and the panel bar goes to the external monitor as intended. Plasma: 5.7 Framework: 5.23 QT: 5.7 Kernel: 4.6.3-1-Arch It only happens on boot up, after I do the display configuration dance everything stays proper through screen locks, sleeps, monitor offs etc. It always happens, so if you want any dumps let me know. Also let me know what to type to get those dumps since I'm not privy on that kind of stuff. I've added a log for boot up (journalctl -b >> bootlog.txt) Maybe you can glean something from this. I'm running a radeon firegl card. Typing in [drm] gets you to some radeon/monitor boot info.
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Fixed as it works not properly on KDE plasma 5.13.4 and KDE framework 4.48.