Le 26/12/2025 à 12:15, Didier Kryn a écrit :
> Le 25/12/2025 à 17:29, Peter via Dng a écrit :
>> From:    Xenguy via Dng <dng@???>
>> Date:    Sun, 21 Dec 2025 21:51:34 -0500 (EST)
>>> ... take responsibility for your own health.
>> A hopefull thought but from a little searching and an enquiry in a
>> forum, adjustment and rejuvination of the human side of the visual
>> interface isn't currently available.  For example a therapy
>> stimulating mitosis to replace lost cone cells might be imagined but
>> is purely imaginative.  No such therapy is current reality.
>>
>>> I think you find and install some 'dark mode' extension for your
>>> browser, ...
>> Yes, evaluate practical benefits of adjustments to the screen side of
>> the interface as others have responded.
>
>     There is always some directory under /sys/class/brightness/ with
> files you can read and one you can write. And there are tools which do
> it for you, depending on your Desktop Environment.
>
>     Xfce4, comes with two tools which interact with files in
> /sys/class/brightness/whatever/ under the hood:
>
>     the command xfpm-power-backlight-helper,
>
>     and a GUI you can add to the pannel, which displays battery status
> and provides a cursor to adjust the brightness of the screen -- that's
> the most comfortable way to obtain what you want.
>
> --     Didier


Erratum: /sys/class/backlight, instead of  /sys/class/brightness

This feature might not exist in all machines; it certainly depends on
the existence of a communication channel to set it up between the video
card and the monitor, plus the necessary software in the video driver.

--     Didier