Xbox Issues with Vizio 65 inch OLED

I posted the following thread on reddit under Vizio, but some of these issues are likely related to the Xbox instead of my TV/Soundbar.

I edited/removed the parts of my original post that pertain to VRR/ or only to the TV:

I'm going to list out everything I've experienced, my setup, and the attempts at resolution I've tried so far.

First, I'm going to tell you that I work in Information Technology. Technology is literally my life. Trust me when I say that I have tried everything. Also trust me when I say that I have the correct (certified HDMI 2.1) cables connected to the correct ports
with the correct settings switched on. I have tried updating, resetting, restarting, factory resetting, you name it. I have tried everything. I will keep mentioning certified because they are actual certified 48gbps Ultra High Speed HDMI cables.

----My Setup----

- Vizio OLED65-H1

- VIZIO P514a-H6 (Elevate) Sound bar connected to HDMI Port-1 (eARC) on both the Sound bar and the TV with an HDMI 2.1 certified cable.

- Xbox Series X (The new one) connected to HDMI port 2 (4k-120hz) with an HDMI 2.1 certified cable.

------Issues-----

Audio:

My soundbar and TV are both "capable of receiving DTS:X" However, the Xbox cannot/will not output DTS:X to the sound bar no matter what DTS does NOT work. Dolby Atmos on the other hand works sometimes. If all of the planets align, then instead of outputting
2 channel audio, I can sometimes get it to properly output Dolby Atmos at least, I can until I switch from one game to another. (I'm also going to post this on the Xbox forum because I'm not sure if this is the TV or the Sound bar, or the Xbox, but regardless.
It doesn't work.) If I have the audio functioning close a game on the Xbox and open a new game. ALL AUDIO STOPS. The Xbox will completely stop outputting any and all audio. Video works-ish. But no sound. In short: Dolby Atmos is spotty, and DTS:X doesn't work
at all.

Sometimes the Dolby Atmos will be "outputting" from the Xbox, but it is extremely choppy and sounds awful. Sometimes I can try changing the TV input to another input and back to the Xbox, but sometimes that makes the Xbox completely stop outputting video
AND audio and I have to power everything off and start all over again (sounds REALLY fun, doesn't it)?

Essentially, there seems to be a handshake issue for audio and it sometimes breaks all audio, sometimes breaks Dolby Atmos, but ALWAYS breaks DTS:X

Video:

Beyond the VRR issues which are known, there are other issues. The Xbox will only properly connect periodically. Often times, I will quit a game, and I will lose all video. When this happens, have to power off the Xbox, the TV, and the sound bar (sometimes
I then have to unplug the TV and plug it back in, wait for it to acknowledge power), and then power it back on.

Here's something else I've noticed: The color is wrong with the Xbox set to Ycbcr. Especially on HDR. If I tell the Xbox to output RGB, and then force the tv to the RGB setting, it blows out all of the blacks. It doesn't matter if I have it set to full or
limited. It has to be set to Ycbcr on the TV in order for the blacks to look right.

Here are the steps I have to follow nearly every single time in order to get the Xbox, the soundbar, and the TV to all somewhat work together:

- Unplug every device from one another

- Unplug the TV from power

- Plug the TV power in (THIS MAY SEEM UNRELATED BUT I ONLY HAD THIS ISSUE WITH MY TV AFTER I GOT THE XBOX HOOKED UP. I'm wondering if there is some sort of CEC issue that is causing the Xbox to keep the TV turned off)?

- Power on the TV and wait for it to completely boot up.

- Plug the sound bar in to the TV

- Change the TV to the HDMI 2 input

- Plug the Xbox in,

- Power the Xbox on

- HOPE that the video AND audio work. If not, I get to start ALL OVER AGAIN

Sometimes I'm able to fix things by triggering for example: the eARC setting in the TV's audio setting from on to off, and then back to on again, but sometimes that breaks more than it helps. Other times I'm able to fix some issues by switching inputs around
a few times and then back, but again: that often breaks more than it helped and I may actually end up with the Xbox not outputting any video OR audio. Many times I've been able to fix the video issues by unplugging the HDMI cable from the back of the Xbox
and plugging it back in, but that NEVER fixes the audio issue.

:)