Hi, perhaps someone has a suggestion for why this is the case.
When I connect my Shield TV to a Vizio M series 2017, I am able to do 3840x2160 59.9Hz YUV 420 10-bit Rec. 2020 without an issue.
That is the output I want so that I can watch HDR movies without an issue and play 60Hz games without having to manually switch between HDMI modes manually each time.
However, recently I moved the Shield TV to Sony XBR75X850E, and it does not allow me to select this mode. These are the color space options that show up for 3840x2160 HDMI modes: https://i.imgur.com/4C03RGb.jpg
As you can see they are all 8-bit and 12-bit modes.
I want 10-bit. 12-bit is useless to me because I don't have any 12-bit content, and 12-bit does not allow for more than 30Hz on HDMI 2.0.
What am I missed? Why can't I get 10-bit Rec 2020?
Have you enabled HDMI Enhanced mode on the port you have it connected to on the Sony TV?