Bug 496294

Summary:	screen brightness slider in systemsettings power management has no effect
Product:	[Applications] systemsettings	Reporter:	PK <pieterkristensen>
Component:	kcm_powerdevil	Assignee:	Plasma Bugs List <plasma-bugs-null>
Status:	RESOLVED NOT A BUG
Severity:	normal	CC:	kde, natalie_clarius, nate
Priority:	NOR
Version First Reported In:	6.2.3
Target Milestone:	---
Platform:	Other
OS:	Linux
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:

Description PK 2024-11-15 06:48:26 UTC

SUMMARY
Using the slider in the systemsettings (power management) has no effect. On both my computers. Both have only one screen

STEPS TO REPRODUCE
1.  Move slider in systemsettings power management module of the systemsettings to change screen brightness and apply new settings

OBSERVED RESULT
Nothing changes

EXPECTED RESULT
Screen brightness changes

SOFTWARE/OS VERSIONS
Operating System: KDE neon 6.2
KDE Plasma Version: 6.2.3
KDE Frameworks Version: 6.8.0
Qt Version: 6.8.0
Kernel Version: 6.8.0-48-generic (64-bit)
Graphics Platform: Wayland
Processors: 4 × Intel® Celeron® J4105 CPU @ 1.50GHz
Memory: 7.4 GiB of RAM
Graphics Processor: Mesa Intel® UHD Graphics 600

Comment 1 Nate Graham 2024-11-15 21:02:43 UTC

That would be expected: when you use this slider, you're not saying "change the brightness right now", you're saying "set the screen to this brightness level when the system enters this power state".

If you want to change the brightness right now, use the Brightness and Power widget in the System Tray.