Bug 501415

Summary:	Brightness level below 100% is not persistent after reboot or unplugging/replugging power adapter
Product:	[Plasma] plasmashell	Reporter:	John B <johnebedford>
Component:	Power management & brightness	Assignee:	Plasma Bugs List <plasma-bugs-null>
Status:	RESOLVED NOT A BUG
Severity:	normal
Priority:	NOR
Version First Reported In:	6.3.2
Target Milestone:	1.0
Platform:	Other
OS:	Linux
Latest Commit:		Version Fixed In:
Sentry Crash Report:

Description John B 2025-03-12 16:23:09 UTC

SUMMARY
I set my laptop screen brightness to around 30%. However, since a recent update (I think to Plasma 6.3) this setting is no longer persistent after (1) a reboot or (2) unplugging then replugging the power adapter. In these cases it resets to 100%. NB on suspend/return the brightness level is indeed persistent.

STEPS TO REPRODUCE
1. Set brightness to level below 100%
2. Either (1) reboot or (2) unplug and replug the power adapter

OBSERVED RESULT
Brightness level resets to 100%

EXPECTED RESULT
Preset brightness level (below 100%) is maintained

SOFTWARE/OS VERSIONS
Operating System: TUXEDO OS 
KDE Plasma Version: 6.3.2
KDE Frameworks Version: 6.11.0
Qt Version: 6.8.2
Kernel Version: 6.11.0-109019-tuxedo (64-bit)
Graphics Platform: Wayland
Processors: 16 × AMD Ryzen 7 4800H with Radeon Graphics
Memory: 15.0 GiB of RAM
Graphics Processor: AMD Radeon Graphics
Manufacturer: TUXEDO
Product Name: TUXEDO Pulse 14 Gen1

Comment 1 John B 2025-03-12 16:33:51 UTC

It appears the update modified my power management settings! I am now able to return to the expected behaviour. Closing as Not a Bug.