Bug 472012

Summary:	Brightness control does not work
Product:	[Plasma] kwin	Reporter:	DeMus <jan.mussche>
Component:	wayland-generic	Assignee:	KWin default assignee <kwin-bugs-null>
Status:	RESOLVED NOT A BUG
Severity:	normal
Priority:	NOR
Version First Reported In:	5.27.6
Target Milestone:	---
Platform:	Fedora RPMs
OS:	Linux
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:

Description DeMus 2023-07-06 18:24:05 UTC

SUMMARY
***
I own a Lenovo Legion 5 Pro laptop with an AMD Ryzen 7 6800 CPU and an AMD Rembrandt [Radeon 680M] GPU, next to an Nvidia GA106M [GeForce RTX 3060 Mobile one. I use the AMD one.
Controlling screen brightness does not work at all when using Wayland. In X11 I can use xrandr to set a value, but in Wayland this does not work:
The function keys on the built-in keyboard don't work, hovering the mouse over the battery symbol and using the mouse-wheel doesn't work. I always have 100% brightness.
I use the Fedora38 KDE spin.
***


STEPS TO REPRODUCE
1. Using the keyboard function keys
2. Hovering the mouse over the battery symbol and using the mouse-wheel
3. 

OBSERVED RESULT
Always 100% brightness

EXPECTED RESULT
Controllable brightness

SOFTWARE/OS VERSIONS
Windows: 
macOS: 
Linux/KDE Plasma: Fedora 38 KDE, kernel 6.3.11-200.fc38.x86_64 (64-bit)
(available in About System)
KDE Plasma Version: 5.27.6
KDE Frameworks Version: 5.107.0
Qt Version: 5.15.10

ADDITIONAL INFORMATION

Comment 1 DeMus 2023-07-09 12:12:54 UTC

Hi, this bug is not a KDE bug so it can be taken away from here. It turned out it is something in Fedora Linux. After installing a package called "light" I can set, increase and decrease the brightness of the monitor.
Sorry for all the commotion.