Automatic screen brightness

I have a Librem 13 v2, running Debian unstable with Mate desktop environment.

Is there a way to automatically adjust the display brightness depending on the environmental light? Does the laptop have an ambient light sensor?

(There was a similar question in 2018 for the Librem 15, but that has no answer).

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No, none of the Purism laptops have one.

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Could you use the camera as a surrogate ambient light sensor? (provided that the camera is not killed)

An external USB dongle that is an ambient light sensor? Does such a thing exist? I’ve never had a need and hence never gone looking.


All of those ideas sound plausible. You may be able to find some sort of ambient light sensor to interface with various microcontrollers, but I cannot guarantee they are of the USB variety.