Bug 506020

Summary:	Brightness-control missing after sleep/wakeup
Product:	[Plasma] plasmashell	Reporter:	slartibart70
Component:	Power management & brightness	Assignee:	Plasma Bugs List <plasma-bugs-null>
Status:	RESOLVED DUPLICATE
Severity:	normal	CC:	kde, nate
Priority:	NOR
Version First Reported In:	6.4.80
Target Milestone:	1.0
Platform:	Fedora RPMs
OS:	Linux
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:

Description slartibart70 2025-06-23 06:27:39 UTC

I had 2 brightness-bars(controls) in the taskbar, one for laptop and one for 4K screen.
Now, after a sleep/wakeup cycle, this is reduced to 'internal screen' only, the other control is gone

Operating System: Fedora Linux 42
KDE Plasma Version: 6.4.80
KDE Frameworks Version: 6.16.0
Qt Version: 6.9.1
Kernel Version: 6.15.3-200.fc42.x86_64 (64-bit)
Graphics Platform: Wayland

Comment 1 slartibart70 2025-06-23 06:29:41 UTC

in systemsettings, this is as follows:
built-in: has a brightness slider, set to 25%
hp-screen: [x] control hardware brightness with DDC/CI

Comment 2 Nate Graham 2025-06-24 17:49:15 UTC


*** This bug has been marked as a duplicate of bug 482713 ***