https://bugs.kde.org/show_bug.cgi?id=492131

            Bug ID: 492131
           Summary: Unable to modify display brightness, until rebooted.
    Classification: Plasma
           Product: plasmashell
           Version: 6.1.4
          Platform: Fedora RPMs
                OS: Linux
            Status: REPORTED
          Severity: minor
          Priority: NOR
         Component: Brightness and Color
          Assignee: plasma-b...@kde.org
          Reporter: 4wy78...@rokejulianlockhart.addy.io
                CC: natalie_clar...@yahoo.de
  Target Milestone: 1.0

Created attachment 172909
  --> https://bugs.kde.org/attachment.cgi?id=172909&action=edit
Reproduction screencast.

SUMMARY
-------
Unable to modify display brightness, until rebooted.

STEPS TO REPRODUCE
------------------
Attempt to modify the brightness via the relevant `plasmashell` plasmoid.

OBSERVED RESULT
---------------
I wasn't able to apply a new brightness value - it reverted each time I
attempted to apply it - and the current brightness was incorrectly reported as
0.

EXPECTED RESULT
---------------
I should have been able to modify the brightness.

SOFTWARE/OS VERSIONS
--------------------
> Operating System: Fedora Linux 40  
> KDE Plasma Version: 6.1.4  
> KDE Frameworks Version: 6.5.0  
> Qt Version: 6.7.2  
> Kernel Version: 6.10.6-200.fc40.x86_64 (64-bit)  
> Graphics Platform: Wayland  
> Processors: 12 × AMD Ryzen 5 7600X 6-Core Processor  
> Memory: 30.5 GiB of RAM  
> Graphics Processor: AMD Radeon RX 5700  
> Manufacturer: ASRock  
> Product Name: X670E Taichi

ADDITIONAL INFORMATION
----------------------
Set as minor because a reboot fixed it.

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