Bug 475829

Summary:	Displays never turn off in wayland session
Product:	[Plasma] kwin	Reporter:	rnet723
Component:	wayland-generic	Assignee:	KWin default assignee <kwin-bugs-null>
Status:	RESOLVED DUPLICATE
Severity:	major	CC:	nate, xaver.hugl
Priority:	NOR
Version First Reported In:	5.27.8
Target Milestone:	---
Platform:	Other
OS:	Other
Latest Commit:	https://invent.kde.org/plasma/kwin/-/commit/482a1f0fb5bddb6d376a6b8d39a04bc16786cc97	Version Fixed/Implemented In:	6.0
Sentry Crash Report:

Description rnet723 2023-10-19 15:33:38 UTC

SUMMARY
***
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***


STEPS TO REPRODUCE
1. Start Wayland session
2. Use display that automatically disconnects it output when no signal is detected
3. Leave system idle and wait 10 minutes for it to try to dim screens

OBSERVED RESULT

Screens turn off for a brief moment, but then immediately light up again. Process repeats every 10 minutes.
This is due to screen 'disconnecting' itself from graphics card output. On Windows you could hear 'device disconnected' sound when screen goes dark. There's no way do disable this behavior in Monitor menu.

EXPECTED RESULT

Screens should stay dark when there's no user input

SOFTWARE/OS VERSIONS
Windows: 
macOS: 
Linux/KDE Plasma: openSUSE
(available in About System)
KDE Plasma Version: 5.27.8
KDE Frameworks Version: 5.110
Qt Version: 5.15.11

ADDITIONAL INFORMATION

The misbehaving monitor model is Lenovo ThinkVision T23i-20, but there should be others like this.

Comment 1 Nate Graham 2023-10-20 17:12:50 UTC

Xaver, isn't this fixed in Plasma 6 already?

Comment 2 Zamundaaa 2023-10-20 17:22:30 UTC

Yes

Comment 3 Nate Graham 2023-10-20 17:24:07 UTC

Thanks!

*** This bug has been marked as a duplicate of bug 379474 ***