Hi.
In my setting I have a Laptop with two external screens. I configured the brightness to be set to 35% on startup. Since Plasma 6.2.2 (I think - now 6.2.3) there is the feature to software dim Monitors whose backlight cannot be controlled by rendering the content darker. These also get set to 35% brightness on startup.
However, the software dim is naturally inconsistent with the backlight dim. In my room during the day a 35% backlight setting is fine, while have the external screens get software dim to 35% is WAY to dark - also the Monitors have their own backlight setting, which the OS cannot see.
There is no GUI option in the settings - at least I haven’t found one - to not apply software-dimming or to configure brightness for screens individually.
Does anyone know if there is a way to disable software dimming on startup?
Thanks and best
from my notes on kubuntu 24.10:
# 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
Nice. Thank you very much!
Take a look at the brightness widget in the system tray, there’s a slider per screen.
That doesn’t disable software brightness, it disables DDC/CI.
it stopped that feature from adjusting the screen brightness automatically (and at the wrong times)… so it did help to keep my monitor brightness under my control where as with the widget operative is was not controllable.