https://bugs.kde.org/show_bug.cgi?id=515431

Zamundaaa <[email protected]> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
     Ever confirmed|0                           |1
                 CC|                            |[email protected]
             Status|REPORTED                    |CONFIRMED

--- Comment #1 from Zamundaaa <[email protected]> ---
This is kind of inherent to how night light is implemented. It's two steps:
- in compositing, adjust content to the desired white point, and reduce
brightness. Black is already on the minimum brightness though, so it stays
unchanged.
- as a post-processing step, map the adjusted white point to the real screen.
With low color temperatures, this multiplies the red channel luminance by a
high factor, up to 3x IIRC. This is what raises black levels.

There is a kernel API in the works that allows us to detect if a built-in
display is OLED, which would help a bit, as then we could just set the black
level to zero on OLEDs. I'm not sure there's a more general solution atm.

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