Today I learned that there’s a utility called ddcutil for Linux (sudo apt install ddcutil) that you can use to set the brightness of external monitors.

e.g., on my machine, to set the external monitor to 30% brightness:

sudo ddcutil setvcp 10 30

github.com/elementary/wingpane

(Should make a good feature alongside Night Light in elementary OS.)

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@aral Ohhh thank you for that very usefull tool 😍

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