Bug 513643

Summary:	Dual screen mode disabled after sleeping mode.
Product:	[Applications] systemsettings	Reporter:	Seal20 <swiller>
Component:	kcm_kscreen	Assignee:	kscreen-bugs-null <kscreen-bugs-null>
Status:	RESOLVED DOWNSTREAM
Severity:	normal	CC:	plasma-bugs-null
Priority:	NOR
Version First Reported In:	5.27.11
Target Milestone:	---
Platform:	Ubuntu
OS:	Linux
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:

Description Seal20 2025-12-21 10:46:42 UTC

SUMMARY
First native screen disabled after sleeping mode, need to readjust parameters to activate it.

STEPS TO REPRODUCE
1. Ubuntu 24 6.8.0-90-lowlatency #91.1-Ubuntu Updated, Notebook screen + hdmi screen
2. enter sleep mode, get out sleep mode
3. 

OBSERVED RESULT
 only second screen is enabled after sleeping mode.
 Screens parameters disabled.

EXPECTED RESULT


SOFTWARE/OS VERSIONS
Windows: 
macOS: 
(available in the Info Center app, or by running `kinfo` in a terminal window)
Operating System: Ubuntu Studio 24.04
KDE Plasma Version: 5.27.12
KDE Frameworks Version: 5.115.0
Qt Version: 5.15.13
Kernel Version: 6.8.0-90-lowlatency (64-bit)
Graphics Platform: offscreen
Processors: 4 × Intel® Core™ i5-2410M CPU @ 2.30GHz
Memory: 15.5 Gio of RAM
Graphics Processor: Mesa Intel® HD Graphics 3000


ADDITIONAL INFORMATION
 This bug started after system update from the 15 December 2025.

Comment 1 Bug Janitor Service 2025-12-21 11:33:45 UTC

Thank you for the bug report!

However Plasma 5.27.11 no longer receives updates or maintenance from KDE; active versions are 6.4 or newer. Please upgrade to an active version as soon as your distribution makes it available to you. Plasma is a fast-moving project, and bugs in one version are often fixed in the next one.

If you need help with Plasma 5.27.11, please contact your distribution, who bears the responsibility of providing help for older releases that are no longer receiving updates from KDE.

If you can reproduce the issue after upgrading to an active version, feel free to re-open this bug report.