https://bugs.kde.org/show_bug.cgi?id=521803

--- Comment #30 from Zamundaaa <[email protected]> ---
Created attachment 193751
  --> https://bugs.kde.org/attachment.cgi?id=193751&action=edit
disable colorops other than the 3d lut

That's a shame, but fixing the multiplier should help slightly at least.
Is the banding noticeable in any specific places, with specific settings or
similar? I drove around a bit in Cyberpunk, and the only case I found where
there's a visible difference between compositing and direct scanout on my
hardware is with night light enabled.

The MR helps for that, but it might not have the same effect for your banding
problem if the cause is different.

In addition to the MR, I also have another hacky patch to test. If the named
curve, matrix or multiplier are at fault, just using 1D + 3D LUT should be
fine.

(In reply to Oleg from comment #23)
> I've also noticed that with "Prefer efficiency" KScreen says that my display
> works in 10bpc mode, but in "Prefer accuracy" it works in 16bpc mode. Not
> sure if that matters.
I don't think it would make a difference, but you can make sure by disabling
the color pipeline with prefer efficiency
https://invent.kde.org/plasma/kwin/-/wikis/Environment-Variables#kwin_drm_use_color_pipeline

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