Bug 509759

Summary:	Powerdevil infinite loop and making system extremely laggy
Product:	[Plasma] plasmashell	Reporter:	lluke8669
Component:	Power management & brightness	Assignee:	Plasma Bugs List <plasma-bugs-null>
Status:	RESOLVED DUPLICATE
Severity:	grave	CC:	kdedev, nate
Priority:	NOR
Version First Reported In:	6.4.4
Target Milestone:	1.0
Platform:	Fedora RPMs
OS:	Linux
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:
Attachments:	powerdevil log

Description lluke8669 2025-09-21 21:07:10 UTC

SUMMARY
After an update, randomly when login on either Wayland or x11, after a few seconds, system becomes extremely laggy for a very long moment.

STEPS TO REPRODUCE
1. Login with user.
2. Lag

OBSERVED RESULT
Extreme lag on either graphical or tty terminal.

EXPECTED RESULT
System going smooth

SOFTWARE/OS VERSIONS
Linux/KDE Plasma: Fedora 42
KDE Plasma Version: 6.4.4
KDE Frameworks Version: 6.17.0
Qt Version: 6.9.2

ADDITIONAL INFORMATION

Comment 1 lluke8669 2025-09-21 22:27:00 UTC

Masking makes system go smooth again, unmasking makes it lag.

Comment 2 lluke8669 2025-09-21 22:44:43 UTC

Created attachment 185145 [details]
powerdevil log

this is the log for powerdevil

Comment 3 Nate Graham 2025-09-23 17:26:17 UTC

What version of ddcutil do you have? If it's not 2.2.1 or later, this is probably Bug 500843.

Comment 4 lluke8669 2025-09-28 16:13:27 UTC

ddcutil version is 2.2.1

Comment 5 Bug Janitor Service 2025-10-13 03:47:06 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 6 TraceyC 2025-10-22 17:23:44 UTC

This looks like bug 507456, please follow that report for updates. This is likely a bug in ddctutils.

*** This bug has been marked as a duplicate of bug 507456 ***