Hello,
I have installed the latest KDE Neon and using 2 monitors. There is a screen brightness widget in the systemtray, where I can controll the brightness of the screens:
This works as expected. The only problem: It doesn’t remember my settings after next restart. It always starts at very light brightness, expecially on the second monitor (just like in the screenshot).
Is there any way to force KDE/Plasma/Wayland or which every system is responsible for that to remember new settings?
Thanks!
my 2nd monitor kept deviating from those settings by going dim like it was about to go to sleep and only after i open the widget and joggle the slider would it go back to the proper setting (my primary monitor didn’t even have a slider).
the whole feature seems doughy and incomplete, so just disabled it.
be sure to set the brightness levels first because after this change the sliders will be gone… or add the package for a separate gui control
from my notes
# to keep brightness levels from changing, disable brightness control slider in system tray
systemctl --user edit plasma-powerdevil.service
# add these two lines to the file that opens
[Service]
Environment=POWERDEVIL_NO_DDCUTIL=1
# save and logout
# to reverse, just delete the directory created at
~/.config/systemd/user/plasma-powerdevil.service.d
# add this package for stand alone GUI control of monitor settings
gddccontrol
I ran into this upgrading from 6.0.3 to 6.2.5 that for the first time ever after a restart it dimmed not only my laptop built-in display as normal, but my external displays as well, which freaked me out as I’ve never seen anything Linux that can hardware control them until now, and until then wasn’t sure it was even possible.
Once I realized I hadn’t burned out my displays or dock, I found indeed they were listed in the brightness settings to adjust back up to normal. It took me a bit to realize I normally use the KDE settings in power management to set the built-in laptop monitor brightness to only 10% as I rarely use it to the size of my normal 3x 50" displays I use, but I certainly don’t want that applying 10% brightness to those!
I too feel like this is a half-complete measure as I’d rather it simply not muck with the brightness for 1 and not others if it can’t figure out which to apply it to and a default “all for one” should not apply to external displays by default.
It would be nice if in power management settings if you can apply the profile brightness to individual displays, like hitting a plus button to add another display beyond the default built-in one, or simply add one for all monitors it can report controlling for individual settings.
Please consider something in future Plasma releases for separate display brightness settings!