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Windows 10 Dull colours after update [not just MC]

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wer:

--- Quote from: rec head on February 18, 2021, 05:09:59 pm ---What is a default ICC color profile?

--- End quote ---
https://pcmonitors.info/articles/using-icc-profiles-in-windows/

rec head:
I didn't do much experimentation but changing the Output Color Format in the Nvidia Control Panel changed things. I went from RGB to 4:2:2 to 4:4:4 and back to RGB. I tried in each mode and in 4:2:2 everything wasn't dark. In 4:4:4 everything looked good and the TV went into HDR mode. Then Going back to RGB the colors looked OK. But playing an HDR movie and hitting Stop didn't take the TV out of HDR mode.

I definitely don't have this sorted out but thought I'd share the findings.

PS. When the colors are too dark Tone Mapping in MadVR doesn't help. I have tried it with different Target Nits values and they don't help.

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