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Chancedbean
Adept I

RX 6900 XT and Dolby Atmos via EARC

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Hi,

Ive posted this question elsewhere and it was suggested I come here. If I get an answer I’ll be sure to update so I don’t waste anyone’s time 🙂

Over the last 6 months I have enjoyed the using Dolby Atmos with my PC via my RTX 2080. I recently switched over to the RX 6900 XT only to find Dolby Atmos does not work.

I have gone to sound setting via the control panel and when I select my default audio device (LG TV SCCR, AMD HIGH DEFINITION AUDIO DEVICE) and go to special sound I can see Dolby Atoms for Home Theater in the drop down box and when I select it and click apply nothing happen. If I click apply again an error pop up box appears saying “Something went wrong while trying to turn on spacial sound”. After a while a message pops up in the LG TV SSCR properties box saying “the device you are configuring has been removed”. I have to play audio again to get it back up.

I then decided to launch Shadow of the Tomb Raider and enable Dolby Atmos from there, sadly this did not work either. My audio device is the Sonos Arc and when I check the app it just says it’s outputting stereo 2.0. I‘ve set up the Sonos Arc to my LG CX 48” TV correctly as it works fine with other devices. I decided to put my Nvidia 2080 back in and Dolby Atmos worked fine, switch back to the 6900 and the problem happens again. I am using the correct HDMI 2.1 cable.

It would probably make sense that my first question is do AMD Radeon GPU’s like the 6900 xt support Dolby Atmos? If so does anyone know how to enable it?

My set up is:

Display: LG CX 48”
Speaker: Sonos Arc with Sub3
CPU: Intel 9900K
Motherboard: Z370 Gigabyte Gaming 7 OP
RAM: 32GB Corsair Vengeance 3800Mhz
GPU: Asus RX 6900 XT
PSU: Corsair RM 1000x
Case: Phanteks P600S

Everything else works well with my new 6900 xt. Any help with this would be appreciated.

EDIT: I’m using EARC to pass through audio to my Sonos Arc soundbar, so I’m not using a DAC/ AMP. 

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Chancedbean
Adept I

Re: RX 6900 XT and Dolby Atmos via EARC

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I ended up solving the issue.

I tried the steps as advised by AMD. That didn’t seem to resolve the issue. I then repeated their recommended steps but this time before installing the AMD drivers I factory reset the settings on my LG CX television then installed the AMD drivers. This meant they were installed without EARC already being enabled on the TV. I then set the TV to pass through and enabled EARC and made sure HDMI was the audio output. And that was it. 

In hindsight I might have been able to resolve this problem just by resetting the TV but I don’t know how to recreate the issue to test out this theory. Hopefully this helps someone. If I’ve said something unclear please let me know and I’ll try to explain it better.

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6 Replies
Chrissi
Journeyman III

Re: RX 6900 XT and Dolby Atmos via EARC

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I have the same problem. Worked fine with a 1080ti. RX 6900 xt won't let me activate Dolby Atmos. Error message... This is definitely a problem caused by the AMD HDMI Audio Driver. The card is good, but this is really bad and needs to be fixed soon. 

Chancedbean
Adept I

Re: RX 6900 XT and Dolby Atmos via EARC

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Sorry you’re having this problem too, although it has reassured me I’ve not got a faulty GPU if it’s happening for others, so thank you for that 🙂

It looks like I’ll have to put up with the very basic stereo sound until they update their audio driver. 

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Chancedbean
Adept I

Re: RX 6900 XT and Dolby Atmos via EARC

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I have reported this problem to AMD technical support and requested they consider this in a driver update. If they come back with anything else or I somehow stumble across a solution I will update here so I will keep this open until they get back to me. 

If there is anyone here from technical support or someone who can escalate to them I (and other users) would appreciate any input. 

Thank you. 

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Chrissi
Journeyman III

Re: RX 6900 XT and Dolby Atmos via EARC

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I don't know why, but my LG TV earc option was turned off. That was my problem. No more Errors, seems to work now. 

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Chancedbean
Adept I

Re: RX 6900 XT and Dolby Atmos via EARC

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My EARC is on my LG CX TV and the Sonos Arc App shows there is only a stereo signal coming from the AMD graphics card. 

AMD support got back to me today. Their suggestion unfortunately did not work. This involved using show or hide to stop windows 10 auto updates, uninstalling AMD drivers in safe mode using the DDU tool, then installing the latest driver back in normal mode. 

The problem remains as it was in my original post.

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Chancedbean
Adept I

Re: RX 6900 XT and Dolby Atmos via EARC

Jump to solution

I ended up solving the issue.

I tried the steps as advised by AMD. That didn’t seem to resolve the issue. I then repeated their recommended steps but this time before installing the AMD drivers I factory reset the settings on my LG CX television then installed the AMD drivers. This meant they were installed without EARC already being enabled on the TV. I then set the TV to pass through and enabled EARC and made sure HDMI was the audio output. And that was it. 

In hindsight I might have been able to resolve this problem just by resetting the TV but I don’t know how to recreate the issue to test out this theory. Hopefully this helps someone. If I’ve said something unclear please let me know and I’ll try to explain it better.

View solution in original post

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