Bug 427890

Summary:	Partial monitor duplication in Wayland and other general dup funniness
Product:	[Plasma] kwin	Reporter:	scott <scott.anecito>
Component:	multi-screen	Assignee:	KWin default assignee <kwin-bugs-null>
Status:	RESOLVED WORKSFORME
Severity:	normal	CC:	nate, plasma-bugs-null
Priority:	NOR
Version First Reported In:	5.20.0
Target Milestone:	---
Platform:	Other
OS:	Linux
Latest Commit:		Version Fixed In:
Sentry Crash Report:
Attachments:	Dup when logging in Dup when clicking inside the other monitor space

Description scott 2020-10-17 19:18:13 UTC

Created attachment 132499 [details]
Dup when logging in

SUMMARY

When jumping into a Wayland session, one of the monitor's sides partially (~1/6) duplicates itself onto the other monitor even though the monitors are not set to mirror.

It's even more weird in that the taskbar duplication will only be one direction. However, if I click on one monitor's display space or the other, it will change which monitor is duplicating the area above the task bar. So if the wallpaper and part of Konsole occupies that ~1/6 vertical slice on monitor A, the wallpaper and the part of Konsole that falls into that slice gets dupped to the other monitor or vice versa, but the taskbar dup source remains the same.

STEPS TO REPRODUCE
1. Acquire two monitors (preferably one 1080, the other 4K)
2. Install all required Wayland packages
3. Follow all Nvidia Wayland wiki steps here: https://community.kde.org/Plasma/Wayland/Nvidia
4. Reboot computer, and select Wayland session

OBSERVED RESULT

One monitor duplicates part of itself onto the other monitor

EXPECTED RESULT

Monitors display independently; there is no duplication

SOFTWARE/OS VERSIONS

Operating System: Arch Linux
KDE Plasma Version: 5.20.0
KDE Frameworks Version: 5.75.0
Qt Version: 5.15.1
Kernel Version: 5.8.14-arch1-1
OS Type: 64-bit
Processors: 8 × Intel® Core™ i7-6700K CPU @ 4.00GHz
Memory: 62.8 GiB of RAM
Graphics Processor: GeForce RTX 2080 Ti/PCIe/SSE2

ADDITIONAL INFORMATION

MONITORS
Ancor Communications Inc C422A (over DP)
ViewSonic Corporation XG2700 Series (over DP)

Comment 1 scott 2020-10-17 19:19:07 UTC

Created attachment 132500 [details]
Dup when clicking inside the other monitor space

Comment 2 Nate Graham 2021-08-16 23:23:24 UTC

A lot of multi-monitor fixes on Wayland have been landed recently. Can you test again with Plasma 5.22? Even better would be 5,23 from the kde-unstable repos. :)

Comment 3 Bug Janitor Service 2021-08-31 04:36:21 UTC

Dear Bug Submitter,

This bug has been in NEEDSINFO status with no change for at least
15 days. Please provide the requested information as soon as
possible and set the bug status as REPORTED. Due to regular bug
tracker maintenance, if the bug is still in NEEDSINFO status with
no change in 30 days the bug will be closed as RESOLVED > WORKSFORME
due to lack of needed information.

For more information about our bug triaging procedures please read the
wiki located here:
https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging

If you have already provided the requested information, please
mark the bug as REPORTED so that the KDE team knows that the bug is
ready to be confirmed.

Thank you for helping us make KDE software even better for everyone!

Comment 4 Bug Janitor Service 2021-09-15 04:36:23 UTC

This bug has been in NEEDSINFO status with no change for at least
30 days. The bug is now closed as RESOLVED > WORKSFORME
due to lack of needed information.

For more information about our bug triaging procedures please read the
wiki located here:
https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging

Thank you for helping us make KDE software even better for everyone!