Bug 451906

Summary:	Blackscreen with mouse pointer only on wayland when multiple displays are connected
Product:	[Plasma] kwin	Reporter:	Elias <supgesu>
Component:	wayland-generic	Assignee:	KWin default assignee <kwin-bugs-null>
Status:	RESOLVED DUPLICATE
Severity:	normal	CC:	cirlo_ca, lemmyg, nate, xaver.hugl
Priority:	NOR
Version:	5.24.3
Target Milestone:	---
Platform:	Arch Linux
OS:	Linux
Latest Commit:		Version Fixed In:
Sentry Crash Report:

Description Elias 2022-03-25 20:32:39 UTC

SUMMARY

When starting a Wayland session and multiple displays are connected to the gpu, only a black screen is rendered with only the mouse pointer visible and moveable.
When only one display is connected to the gpu, the wayland session correctly renders the desktop.

STEPS TO REPRODUCE

1. Start KDE Wayland session

OBSERVED RESULT

Only black screen with mouse pointer is shown.

EXPECTED RESULT

Desktop should render correctly.

SOFTWARE/OS VERSIONS
Windows: 
macOS: 
Linux/KDE Plasma: Arch Linux / KDE 5.24.3
KDE Plasma Version: 5.24.3
KDE Frameworks Version:  5.92.0
Qt Version: 5.15.3

ADDITIONAL INFORMATION
GPU: Nvidia GTX 1060, using nvidia v510.54 driver
Kernel: default 'linux' package from Arch, version 5.16.16-arch1-1

Comment 1 galder 2022-03-26 12:27:28 UTC

Posible duplicate of https://bugs.kde.org/show_bug.cgi?id=353975

Comment 2 Nate Graham 2022-03-26 16:24:08 UTC

Maybe, but maybe not. Elias, does this affect all screens, or only one? If it's only one, then it's probably the same as Bug 353975.

Comment 3 Elias 2022-03-29 10:21:43 UTC

> Elias, does this affect all screens, or only one?

It did affect all screens, so it is not a duplicate. However the issue is no more since I recreated my user account. Seems there was a problem with some config or cache. I now created a new user and set up most of my stuff again and it still works. (Well, despite of some graphical glichtes, but it is not black anymore.)

I'm sorry to tell you that I forgot to take a backup of the old users dotfiles. (Didn't really think that this would fix it, was just about resetting my user anyway.) So we can't figure out what exactly caused the problem :/

I will mark this as resolved for now. Will see if the problem comes up again after more configuration.

Comment 4 Nate Graham 2022-03-31 21:07:06 UTC

Thanks for the info.

Comment 5 Vlad Zahorodnii 2023-01-17 11:08:55 UTC

Reopen if the issue comes back.

Comment 6 Nate Graham 2023-01-17 14:30:15 UTC

The symptoms indicate not a KWin issue, but rather the age-old Plasma multiscreen containment loss issue, which has been fixed for Plasma 5.27.

*** This bug has been marked as a duplicate of bug 450068 ***