HDR + Dolby Atmos, LG 2017 OLED TV, Yamaha RX-A860

Last week, I finally took the plunge into 4K, and I'm very pleased overall. I purchased a new XBOX ONE S back in December in preparation for this transition. My intention was to use the XBOX as the media hub for playing 4K UHD Blu-Rays and take advantage
of HDR10 and Dolby Atmos.

The equipment and the key configurations that I'm using are:

• LG OLED65C7P UHD TV
  
  Firmware version 03.60.09
  
  "Deep Color" is enabled for HDMI-1 and HDMI-2
  
  TV audio output set to ARC (HDMI-2)
• Yamaha RX-A860 AV Receiver
  
  Firmware version 1.27
  
  4K Mode 1 has been enabled
  
  HDMI 1 outputs Audio+Video to TV HDMI1
  
  HDMI 2 outputs Video only to TV HDMI2
• XBOX ONE S
  
  4K UHD +
  
  36-bits per pixel (12-bit color depth)

Firmware of all of the devices are the latest available all around, and I'm connecting to XBOX Live.

As good as everything looks, I quickly started to realize some of the limitations; there are challenges getting HDR10 and Dolby Atmos to work simultaneously. That is my primary concern -- not sacrificing Audio quality for HDR or vice versa.

The reality that I am encountering is that HDR is very FRAGILE with this configuration. The first sign of trouble is evident when setting the 12-bit color depth on the XBOX. I've tried lowering the color depth setting to 10-bit, which seems like it would
align better with source material, but the AV Receiver and TV lose the signal. Depending on how persistent I am, I've gotten the XBOX into a state that it will not display an image on the TV without

resetting display settings.

As painful as it is, I have gotten it to work. Launching Netflix actually starts HDR mode on the LG TV (there is an icon that appears in the upper-right of the screen to confirm). Playing movies in this way, when it works, it is phenomenal. Well worth
the time and energy.

However, if I do anything that causes the XBOX to switch back to non-HDR mode, and then come back to HDR, the AV Receiver and TV lose signal again -- I have to start restarting devices to get the display to appear again.

The other interesting symptom is that when I launch the Amazon Prime Video and try to start a 4K HDR movie, the screen goes black, and the HDR symbol never appears. And in a short while the XBOX just turns itself off -- not sure if there is an error message
or anything because of the nature of the error, but it's like the XBOX OS just crashes hard.

I have tried connecting the XBOX HDMI output directly to the TV. HDR seems to work more reliably in this configuration, though I haven't used it enough to know for sure how solid it is. There is a big downside here, I lose Dolby Atmos audio -- it requires
an HDMI connection. The audio signal is passed back to the AV receiver via ARC; and LG does not pass Dolby Atmos over this output.

Anybody else have a similar experience and can suggest a setting or approach that may work better?

:)

 

Dolby Atmos not working on LG Oled B7C

My Xbox one X states that my LG Oled 65 B7C is not compatible with Dolby Atmos. Tv is correctly setup to revive Atmos so why does my console not support the LG?

 

Labyrinth 4K Atmos Bluray - Dolby Atmos not working with Xbox One S

TV - Vizio M55-C2 4K TV - latest firmware/software

https://support.vizio.com/s/article/M55-C2-Model-Information?language=en_US

Receiver - Yamaha Aventage RX-A660 (Dolby Atmos capable) - latest firmware/software

RX-A660 - Overview - AV Receivers - Audio & Visual - Products - Yamaha - United States

Xbox One S - latest firmware/software

Bluray - Labyrinth 4K Blu-ray

I cannot get the Xbox One S to output Dolby Atmos to my receiver for this bluray.

The Dolby Atmos app samples on Xbox One work fine and receiver outputs Atmos.

This bluray only outputs Dolby TrueHD (not Atmos). Xbox set to Bitstream passthrough to Yamaha receiver and Atmos setting to home theater enabled but only TrueHD output.

Any ideas?

 

I spent some more time with it this afternoon, and I discovered that the "Blu-ray Player" app exhibited similar symptoms as the Amazon Prime Video app -- display would go blank and even seemed to crash the XBOX. There were other annoying side effects --
the AV Receiver kept changing inputs to take audio from the ARC channel from the TV. So I rethought my connection strategy a bit:

• Disabled ARC and HDMI control features on both the TV and AV Receiver
• Added an optical audio cable between the TV and AV Receiver; still no Dolby Atmos for the TV's apps, but no worse than ARC
• TV HDMI1 handles all output from the AV Receiver, including the XBOX; while HDMI 2 handles the Smart TV apps

This arrangement works far more reliably, however, I've still seen glitches. Quite often it seems that if I start an app that causes the TV display to change modes, the black screen results. I've seen this with a standard Blu-ray, which usually triggers
the display to switch to 24Hz refresh rate, it doesn't even have to be 4K UHD HDR content. My old TV usually flashed during the the 24/60Hz switch, but it and my old AV Receiver handled the transition seamlessly.

This newest observation led me down a new research path... I've read about problems with LG TV's and the HDCP handshake not happening fast enough when the connection is through an AV Receiver. I've noticed that when the symptom appears, if I turn off both
the TV and AV Receiver and then:

1. Turn on the AV Receiver, wait a few seconds
2. Turn on the TV

The expected content appears on the screen after a delay. That strongly suggests to me that the TV is just giving up on some kind of negotiation too quickly, and there isn't any kind of retry mechanism.

Anyway, if anyone has any similar experience and you have a workaround or suggestion, please share. Thanks!

 

I have a case open with LG about issues with the xbox not stepping down resolutions correctly, so if you put in a 3D BR it falls to a blank screen.

Setting the Xbox Colour Depth to 24 bits per pixel [8 bit colour] seems to make everything more stable.

Maybe worth trying this and see if it improves your experience as well.

The PS4 Pro seems to have none of these issues running in 10 bit 4K mode, so it definitely feels like a dashboard issue.

 

Thanks for the response Haydong

Just a quick update, my problem has not recurred since I stopped making changes to settings. XBOX color depth is still at 36 bits per pixel (12-bit).

I'm now thinking that most of my symptoms disappeared when I eliminated ARC and CEC, and switched to using the HDMI video out only from the AV receiver to the TV. Maybe I was initially seeing problems because some components hadn't been restarted yet? I
haven't watched a lot of UHD Blu-ray and yet, but I haven't seen any more instances of the TV getting stuck on a black screen.