Disable Automatic Keyboard Backlight on MATE

[Ruskin]

By default the keyboard backlight turns on automatically on startup and various other times. If you want to disable it entirely you can open "/usr/share/dbus-1/system.d/org.freedesktop.UPower.conf" with root privileges by running

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sudo open /usr/share/dbus-1/system.d/org.freedesktop.UPower.conf

from the command line and replace

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<allow send_destination="org.freedesktop.UPower"
           send_interface="org.freedesktop.UPower.KbdBacklight"/>

with

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<deny send_destination="org.freedesktop.UPower"
           send_interface="org.freedesktop.UPower.KbdBacklight"/>

However, if you still want the backlight to be usable (and just not turn on automatically), instead you can run

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gsettings set org.mate.power-manager kbd-brightness-on-ac 0
gsettings set org.mate.power-manager kbd-backlight-battery-reduce false

from the command line (suggested by Jasmin Hassan in this thread), or edit the same settings with a user interface by installing and running dconf-editor:

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sudo apt-get install dconf-editor
dconf-editor

and navigating to org/mate/power-manager.

Linux Mint 21.2 Victoria and MATE 1.26.0

[Esbeeb]

I needed this; much appreciated.