First of all, I am *really* impressed by the state of Wayland with KWin. Good job and a big thank you - I was expecting some tech-preview but instead KWin+Wayland worked great, with minor issues here and there. I moved recently from Unity (since Unity8+Mir was canceled) to Gnome Shell (which was horrible both in X11 and in Wayland) and finally to Plasma, which I am really happy with.

I apologize upfront for missing info - I'm a long-time Linux user but just a beginner KDE user :) Just let me know what you need, I'll get it done.

Now to the bug itself. When using Plasma on X11, I can configure the screen so that the laptop display is disabled and the output is transmitted to the external display only, and this works flawlessly. However, when I do exactly the same in Plasma+Wayland, the laptop display stays on, even though in the "Displays" window the "Display: Enabled" checkbox is unchecked. Since this works in Plasma+X11 I ruled out driver issues.

Please let me know for any additional info you may need. If you are interested, I have three laptops and I can test on all three of those. Or maybe this is a known issue and it's just that my KDE bugtracking system search-fu is weak :)

Thanks & kudos :)