You would be best to discuss this matter with the manufacturers customer support desk - maybe give them a call. I have their C9 TV and that switches off Simplink with no issue and it stays switched off allowing the audio output to be changed. It might be the case that the TV firmware needs an update, but perhaps see what LG say about the matter.

Nope. The ERC is automatically re-enabled by Sonos and only when Sonos arc  device is used in that port

Presumably it’s any device designed to connect to the TV ARC/eARC port that makes use of the CEC protocol. Usually (in most cases) it’s just a case of switching off CEC on the TV to then allow access to all other audio outputs.

Every poster here has listed disabling a feature of the TV so the broken CEC implementation on the Sonos will stop continuously grabbing the audio for itself. No other make of soundbar does this.

​​​​​​If a stretch of road is bad and every car needs the tires taken to half pressure for it then pumped up again afterwards you don't fix ALL the cars. You fix the road.

Which means switching off CEC - same if you use Bluetooth headphones or BT speaker with the TV - you need to switch it off when you’re done using it. There is nothing wrong with how Sonos works when using the audio return channel and CEC control… the TV settings cater for the switching between input/output already. So there is nothing that needs fixing here.

Issue still persists

LG G3 oled + sonos beam gen 2

Cannot even switch off cec/simplink on my lg

Problem has been going on for years. ** terrible support for such a premium brand.

This is a reason to return my sonos set-up

*Moderator Note: Modified in accordance with the Community Code of Conduct.*

Appreciate the feedback.

Though switching off cec should also not be necessary in my opinion. Probably will tryout a Samsung audio set-up and if that sounds satisfactory without problems switching to headphones (and no cec workarounds) , I'll probably move away from sonos (for Tv at least, already have a 2.1 sonos for many years for music which i'll keep) 

I can’t believe the Sonos Beam Gen 2 doesn’t have Bluetooth ability.  Wow, I just paid $500 for a soundbar that doesn’t even do what the cheap one it replaced did.  I was going to blast some Spotify tunes from my phone.  SO DISAPPOINTED!

Helpful

Hi,

I opened a ticket at LG. This is the feedback I received (translated via google from german to english):

My request:

Ladies and Gentlemen

I recently purchased an LG TV "OLED65C39LC". I use Simplink and have connected the TV to a Sonos ARC. Unfortunately, it is no longer possible to change the audio settings so that you can either use the TV's speakers or use a headset connected to the TV via Bluetooth.
 

I would like to continue to use the CEC function in conjunction with a Sonos ARC, as I normally use the Sonos ARC for audio output. In the evening, however, I would prefer to use a headset that is connected to the LG TV via Bluetooth.
 

Problem: Every time I switch to audio output “headset”, the TV resets the settings back to HDMI ARC (Sonos ARC) after 2-3 seconds. The problem has already been described by people in various forums and has existed for more than 3 years. I find it disappointing that a product like the OLED65C39LC also has this problem - even considering the very high price.
 

Deactivating the Simplink function is not a solution either! I don't understand why LG hasn't implemented the feature so that the audio settings that you set manually don't remain permanently configured.
 

I hope that LG finds a solution here and offers it to us customers.

The Feedback:

Dear Mr. x,

Thank you very much for contacting LG Electronics Deutschland GmbH.
- Due to the CEC control, the HDMI-ARC connection is always prioritized and functions normally. I can't offer any solution other than interrupting HDMI.
 

A direct reply to this email is not possible. If you would like to contact us again, please open a new ticket using the contact form. If you have any further questions or suggestions, please feel free to contact us at any time.
 

Best regards

x

A workaround using fiber is no option for me because the Sonos ARC does not support fiber :-(

Which workaround using fiber are you speaking of? I thought the workaround was using optical for the connection between the TV and the Sonos Arc? The Arc ships with an optical to ARC adapter, as far as I know.

On my LG CS  I was able to solve this problem by disabling the TV's universal control settings for this input. I left HDMI-CEC on. 

I had the same issue and found that changing the Digital Audio Out setting on my LG tv to 'Auto' stopped the flickering happening and it accepted the Bluetooth setting. Had to put it back onto Pass Through when I had finished using my Sony WH 1000 MK3 headphones to get the optimum sound from my Sonos setup after I had finished using my headphones so a bit of a pain but a welcome solution.

If you have Sonos Arc and want to listen Bluetooth headphones then buying the Sonos Ace (Sonos headphones) is the answer because Sonos headphones communicate with Sonos Arc to stop sound and send to headphones. 

I wished they had a Sonos app switch to temp disabled the arc from TV.

I figured out how to fix. You just go to your audio settings on your LG and turn on the “ears” setting. My Sonos Ace kept flipping off every couple seconds. This resolved it.

Yes, I’m using LG OLED SMART TV too, every time i connect my bluetooth headphones to my tv, 3 seconds later the sound will go back to the beam. 

is there anyone with the solution? this is a major issue.

Ya, i wonder if there is a solution yet, it’s been many years.

Hi everyone,

found a semi-solution

https://www.reddit.com/r/webos/s/iP9D9hHHyl