Had a problem then solved it, figured I'd tell my story in case any one has similar problems. Forza Horizon 4 on my new Xbox One X says it couldn't detect HDR display. At first I thought it was the bundled cable. but. .
I think fully resetting the console did it. My guess what worked is. I started on HDMI 4. This TV needs to be on HDMI 2 or 3 for HDR. I tried 3 didn't work, tried 2 then didn't work. Then reset console. I guess the setting changed from HDMI 4 to HDMI 2 when I finally decided to fully restart the console. In other words even when I switched HDMI's to an actual HDR capable input, it didn't work until I reset the console and restarted it complete. Sort of to refresh it.
Upstairs - Sony 75x940e: soundbar - Klipsch R-20B: game system - XBOX One X
Basement - BenQ HT3050: screen - Elite 125" motorized ATS: speakers - RF-7IIx2, RC-64II, RS-41IIx2, RS-42IIx2, AVR Denon x4000 -- subs PC-12NSD + RW12D: game system - PS5
Bedroom - LG 65eg9600: soundbar - LG SH3K
Last edited by Teremei; 06-14-2020 at 02:26 PM.