Xbox one X was stuck on 640x480 said TV was not 4K

I had the same issue using a Denon hdmi 2.1 AVR. I solved it using VRR with 120hz, but I have a hdmi 2.1 tv and a Series X, not One X. I guess you are stuck with 4k without vrr or full hd 120 and vrr. Another solution is to connect the Xbox directly to the tv and use arc/earc for audio, but One X does not support 4k 120hz, so you are stuck with full hd 120 if you use vrr.

I don't see anything to suggest that that monitor has 2 different HDMI ports (ie one 4k and one not). It could simply be a faulty port which is more pronounced with the XBox than the PC....something doesn't seem right as both ports should show up as the same recommended on the PC.

I would say that I used to occasionally turn on my One X and find it was displaying 640x480 resolution with no option to change to 4k (on my 4k TV)....that, however, was simply resolved by unplugging and reinserting the HDMI lead.

I have exactly the same problem with the XBOX ONE S console. The console issues a resolution on two of my 4K TVs, only 640x480. Prior to this, the console on these TVs showed an image in 4K resolution. Resetting video tastes and full reset of the console
with the firmware did not help! Such a feeling that the console blocked the signal! Help your advice! Thank you !

I have exactly the same problem with the XBOX ONE S console. The console issues a resolution on two of my 4K TVs, only 640x480. Prior to this, the console on these TVs showed an image in 4K resolution. Resetting video tastes and full reset of the console
with the firmware did not help! Such a feeling that the console blocked the signal! Help your advice! Thank you !

Hi!

Thank you for the help!

My TV has without any doubt the 4K, it's said on the TV manual and on the xbox one x options

Instead for the HDR it's said on the TV manual and on the tv option that I have HDR (I even have the option turned on on the TV), but I don't know why my xbox one x says that my TV doesn't support it