Bug 485031

Summary:	screenlocker turns off the screen after 60 seconds and then turns it back on again
Product:	[Plasma] plasmashell	Reporter:	Albert Eureka <albteureka>
Component:	Screen locking	Assignee:	Plasma Bugs List <plasma-bugs-null>
Status:	RESOLVED WORKSFORME
Severity:	normal	CC:	kde, nate, Squashynator
Priority:	NOR
Version First Reported In:	6.0.3
Target Milestone:	1.0
Platform:	openSUSE
OS:	Linux
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:

Description Albert Eureka 2024-04-04 14:16:18 UTC

screenlocker turns off the screen after 60 seconds and then turns it back on again

I have two monitors, and I set turn off screen after 60 seconds when screen locked in systemsettings, however I found that when the screenlocker turns off screen, after 10 seconds, it turns on again, and 60 seconds after that, it turns off again...

And when I turned off my second monitor, after the screenlocker turned off the only screen, it would not turn on the only screen anymore.

I thought that might be, when the screenlocker turns off two monitors, the external monitor(with HDMI connected) counts down for 10 seconds and then sleep, after that, KDE detect the external screen is detached, it thought that might be a sign of someone trying to unlock, and then KDE screenlocker turns off both the two monitors.

STEPS TO REPRODUCE
1. set turn off monitor after specific time when screen locks
2. plug in your second monitor and then lock the screen
3. wait for two monitors to turn off

EXPECTED RESULT

the monitors will not be turned on until you tap some key or move the mouse

SOFTWARE/OS VERSIONS
Linux/KDE Plasma: KDE Plasma 6.0.3
KDE Frameworks Version: 6.0.0
Qt Version: 6.6.3

ADDITIONAL INFORMATION

openSUSE-tumbleweed, linux 6.8.1, laptop
GPU: Intel alder-lake iris-xe graphics, opensource mesa
two monitors: internal monitor and external HDMI monitor with energe saving functionality

Comment 1 Reg 2024-05-16 02:29:35 UTC

I had this problem but it turned out after much searching around that I had two monitors that were set to automatically look for an active port if the signal dropped. When they started searching they jiggled a signal which would trigger Linux to wake up the monitors. The solution was to turn off auto-seeking in the monitors.

Comment 2 Nate Graham 2025-05-29 16:18:51 UTC

Thanks for the bug report, and I'm sorry we weren't able to look into it yet. A lot has changed since this was reported; can you still reproduce the issue in Plasma 6.3.5 or later? Or even better, in the Plasma 6.4 beta or the 6.4 final release in a few weeks?

Thanks again!

Comment 3 Bug Janitor Service 2025-06-13 03:48:10 UTC

🐛🧹 ⚠️ This bug has been in NEEDSINFO status with no change for at least 15 days. Please provide the requested information, then set the bug status to REPORTED. If there is no change for at least 30 days, it will be automatically closed as RESOLVED WORKSFORME.

For more information about our bug triaging procedures, please read https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging.

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

Comment 4 Bug Janitor Service 2025-06-28 03:47:51 UTC

🐛🧹 This bug has been in NEEDSINFO status with no change for at least 30 days. Closing as RESOLVED WORKSFORME.