Bug 378955

Summary:	KWin+Wayland shows display on primary screen even though it is disabled
Product:	[Plasma] kwin	Reporter:	Martin Vysny <vysny>
Component:	wayland-generic	Assignee:	KWin default assignee <kwin-bugs-null>
Status:	RESOLVED LATER
Severity:	normal
Priority:	NOR
Version First Reported In:	5.9.4
Target Milestone:	---
Platform:	Ubuntu
OS:	Linux
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:

Description Martin Vysny 2017-04-19 11:10:33 UTC

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 :)

Comment 1 Martin Vysny 2017-04-19 11:13:04 UTC

This issue is reproducible on a fully updated Ubuntu 17.04 x86-64 4.10.0-19-generic #21-Ubuntu SMP; the notebook has both VGA compatible controller: Intel Corporation HD Graphics 530 (rev 06) and VGA compatible controller: NVIDIA Corporation GM107GLM [Quadro M1000M] (rev a2); the nouveau module is loaded but I'm not sure whether it is actually used; not using Nvidia binary drivers. I can test on my other laptop which only sports Intel integrated GPU.

Comment 2 Martin Flöser 2017-04-19 14:24:15 UTC

Screen configuration is currently not yet fully implemented.

Comment 3 Martin Vysny 2017-04-19 16:21:22 UTC

Thanks for the update, looking forward for this being resolved.