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:	NEEDSINFO WAITINGFORINFO
Severity:	grave	CC:	nate
Priority:	NOR
Version First Reported In:	6.4.4
Target Milestone:	1.0
Platform:	Fedora RPMs
OS:	Linux
Latest Commit:		Version Fixed 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