The Ascent is not triggering Auto HDR /Dolby Vision mode

Just to be sure. Go to TV and video options and under video modes disable low latency mode, hdr10, auto HDR and Dolby Vision if you use and test games again.

Go to your video mode settings on the console and uncheck the following:

"Allow YCC 4:2:2"
"Auto-HDR"
"Allow HDR10"
"Allow Dolby Vision"

Then, fully shutdown the console by holding the power button for 15 seconds. Power on normally and see if that makes any difference.

Hi

If your console is up to date it should work.

Xbox One Dolby Vision HDR - Everything you should know:

https://www.windowscentral.com/xbox-one-dolby-vision

How to use Dolby Vision HDR on Xbox One:

https://www.windowscentral.com/xbox-one-enable-dolby-vision

On your console display settings, is HDR and Dolby Vision enabled?

Most people that get flickers on the screen (both playing or only on the dashboard) with Dolby Vision on is because both HDR and Dolby Vision are enabled at the same time.

Just try to turn HDR off and see if it solves your problem. If it does, unfortunately we will not be able to do much about it. It's a bug reported by some people and the only option would be use HDR or Dolby Vision, not both at the same time

But know that HDR and Dolby Vision are two different, incompatible, color schemes for UHD TV sets. Most support HDR but some support Dolby Vision. There are a couple of websites I check for this kind of tech talk but I don't think we csn post links to
outside sites here. Most UHD tvs support HDR 10 but I've heard Dolby Vision is better. Xbox One does not support Dolby Vision, just HDR 10.