https://bugs.kde.org/show_bug.cgi?id=498771
--- Comment #7 from Jakob Petsovits <jpe...@petsovits.com> --- (In reply to Peter Huatan from comment #6) > I am not on a laptop. I'm on a desktop with a separate external monitor. > Could you tell me what details you need for my system (the computer) and the > monitor? I'll be happy to provide what I can. Ah sorry, I incorrectly assumed based on the 7840HS. Thanks for the quick responses. Here are two terminal commands that will show more information about your monitor, please paste the output into this bug report: $ ddcutil detect (look at the list and use your monitor's display number in the command below, likely 1) $ ddcutil --display 1 getvcp 10 So what's generally happening on your system is that the plasma-powerdevil background service reloads the power management settings after you press "Apply", and tries to set brightness to 48% as you've configured in the "Change screen brightness" setting on the same settings page. You can prevent the brightness change on "Apply" if you disable the "Change screen brightness" setting with its checkbox. Now, I'm not sure why 48% would count as "dramatically increased brightness", but I also don't know what your original brightness value was. Perhaps let me know what your the ddcutil getvcp command that I mentioned above prints before and after screen brightness increases for you. Most importantly, do these values this match up with the level that your monitor's OSD menu shows? Note that I'm currently preparing a merge request which would disable and hide the "Change screen brightness" setting for systems without battery, and for systems without an internal display. It's likely more confusing for desktop PC users than it helps, especially because there is already a similar but slightly different setting for each screen separately, which can be configured in the Brightness and Color applet and also in the Display Configuration page in System Settings. So, if you don't disable the checkbox, I may do it for you automatically in a future release :) -- You are receiving this mail because: You are watching all bug changes.
