I cannot get my UHD Blu Ray discs to play with my Xbox One S on my LG55UH7700 4k TV.

This is the exact same behaviour I find.

I have my Xbox One S set to UHD 4K resolution for my 4K TV and the games and UHD 4K Blu-rays work fine at that resolution but when I pop a DVD or standard Blu-ray disc in, all I get is a postage stamp sized video in the middle of the screen. I am assuming
that the fault lies with the player software and not the Xbox One S hardware.

Very disappointing as it means that I can't use the XBox One S to play all my disc based video content on my 4K TV

Can anyone from Microsoft shed any light as to a potential fix for this ?

"Ultra HD" Blu-Rays will play in 4K. Standard Blu-Rays will play in 1080p.

The Xbox One S will only output to the highest resolution offered by the Blu-Ray disc it plays.

I suppose this design choice was in mind because 4K/UHD-TVs already process and upscale a lower resolution image to "cleanly" use all of the 3840x2160 pixels, so it's not putting unnecessary load on the Xbox One S CPU.

Hi there,

let me try to answer your questions.

1 and 2. Yes it can play 4K Blu-ray discs and Yes when set to 4K output it will upscale the content. See this snippet from the support page: "When you set your console resolution to 4K UHD, everything on the console—Home, games, and apps—will display at
4K. 4K content is displayed in its native 4K resolution, and other content (like 1080p content) is upscaled to 4K."

This is the link to the support page with the information:
support.xbox.com/.../4k-on-xbox-one-s

I recently tried watched The Force Awakens on my xbox one s rather than my blu ray player, and i must say, i was absolutely impressed with the blu ray upscale. Although keep in mind that it was connected to an Hdmi port that supported UHD color on a 4k Samsung
Tv

My internet connection is 300Mbit down/20Mbit up, so speed isn't the issue for me. I can run 4k Netflix just fine along with Prime Video on my Roku 4. My TV is not 4k @ 60Hz but it can do 4k at 50Hz, 30Hz, and 24Hz. I have tested this through my Roku
4 and Android TV box. However, the XBOX One S says my TV fails everything. I am not sure how it determines what it does but it is clearly flawed! My Dashboard may not be displayed at 4k due to the 60Hz limitation but YouTube, Vudu, Prime Video, and Netflix
should all run fine in 4k with no issues at all. UHD Blu-Ray discs should also play fine natively at 4k. Out of everything I have tried, I can't get a single one of them to even scale up to 4k. I do not have a UHD Blu-Ray disc to try and going out to buy
one seems like a waste with how disappointing this One S experiences has turned out to be so far.

Hi,

The One X can already play 4K UHD Blu-Ray movie discs, the same as the One S. There's nothing to upgrade.