https://bugs.kde.org/show_bug.cgi?id=469895
Bug ID: 469895
Summary: Cannot change laptop display brightness when connected
to external monitor with ddcutil support
Classification: Plasma
Product: Powerdevil
Version: 5.27.5
Platform: Archlinux
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: general
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected], [email protected]
Target Milestone: ---
SUMMARY
***
Cannot change laptop display brightness when connected to external monitor with
ddcutil support.
***
STEPS TO REPRODUCE
1. Boot system with external monitor attached.
2. Change display brightness using brightness slider.
OBSERVED RESULT
Brightness of external monitor changed.
Laptop display brightness won't change.
EXPECTED RESULT
Since we only have one brightness slider for display, laptop display brightness
should be prioritized to change.
SOFTWARE/OS VERSIONS
Linux: 6.3.2-arch1-1
KDE Plasma Version: 5.27.5
KDE Frameworks Version: 5.106.0
Qt Version: 5.15.9
ADDITIONAL INFORMATION
ArchLinux enable DDC support by default recently in
https://github.com/archlinux/svntogit-packages/commit/7af23ec774d7ac53cf15904765de112cb7b3b934.
Which Powerdevil already did in master
https://invent.kde.org/plasma/powerdevil/-/commit/e4a5e5d3e017ef45979933e14e47408bb3a59dda.
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