SUMMARY I have two backlight interfaces: intel_backlight and nvidia0. Both of them have 'raw' types. Powerdevil uses upower backlight helper that just reverse sorts all available interfaces and picks the first one. There's no possibility to point it to use the right interface. So in my case, it just picks nvidia0 interface while intel_backlight actually used to change brightness. STEPS TO REPRODUCE Any laptop with to backlight interfaces with the same priority (type). OBSERVED RESULT use the last one from the list of interfaces with the same priority. EXPECTED RESULT use configured backlight interface if any. ADDITIONAL INFORMATION Lenovo Legion 7i (GPU: intel + nvidia)laptop. SAME TICKET https://bugs.kde.org/show_bug.cgi?id=315506 Marked as resolved, but hasn't been.
A lot of this logic was changed in 5.25 (see https://bugs.kde.org/show_bug.cgi?id=399646). If that improved logic works that's probably a better solution than exposing this as a configuration. Can you test a current version and see if the backlight behaves properly without needing this?
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This bug has been in NEEDSINFO status with no change for at least 30 days. The bug is now closed as RESOLVED > WORKSFORME due to lack of needed information. For more information about our bug triaging procedures please read the wiki located here: https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging Thank you for helping us make KDE software even better for everyone!