Beam: Keeps switching back to ARC from Bluetooth - how to stop?

Can you test another brand soundbar?

I have the same issue with LG C9 and Arc, infuriating. Was fine with Playbar as was over optical :(

Sonos, please fix this! 

I’m not sure Sonos thinks anything needs fixing. Though I can see the problem for you.

Not sure what im doing wrong but the Simplink setting on the LG C1 will automatically re-enable itself. So i dont think that ‘work around’ is an effective one. Im able to get the bluetooth headphones to work intermittently by following a random procedure of switching the audio ouput and disabling simplink, but i have not been able to uncover a pattern/procedure of steps required to do this consistently. 

The only thing that seems to work 100% of the time is unplugging the HDMI cable from the eARC enabled hdmi port on the TV or soundbar. 

To assure myself that im not going mad, i plugged in my old Samsung soundbar and it worked a treat (including LG remote control volume adjustment which demonstrated that CEC was still on), so this is definitely a SONOS related issue. Anybody who begs to differ is clearly delusional. 

After dropping some decent coin on this setup I’m left quite disappointed with my first (and last) SONOS acquisition given the terrible customer support and outright refusal to even acknowledge that this is their problem to fix. 

Without knowing about CEC protocols and how to adhere to them (there does seem to be a difference between Samsung and Sonos) we still do not know if, technically, there is a problem to fix.

For you the LG turning on Simplink automatically is an extra disadvantage.

I'm yet another with the same issue: LG CX65 with a Beam+Sub and Sony WH-1000XM4 Bluetooth headphones. I try to listen with headphones at night to avoid the sub waking up everyone within 50 miles, and the sound just switches back to the Beam immediately. Switching off CEC/Simplink is a stupid workaround, made even stupider by the fact that it switches itself back on the instant I do actually want to use the soundbar. 

As it looks like other soundbar makes do not have this issue with LG TVs, and Sonos soundbars with multiple TV brands do; it is surely down to Sonos. To those saying that it is a 'feature' of CEC, do you honestly think that the CEC standard states 'compliant devices must hijack audio output contrary to direct user choice'?

Sonos please sort this out.

I am struggling to know if this is a Sonos or a TV problem ( I have an LG too which seems to be very common in this thread). 
 

until 3 days ago I could quite happily hear everything through the Sonos from the TV. I then noticed the tv switching from hdmi arc to internal speakers….. I would then flip it back to hdmi arc only to get no sound. I have had no sound on Hdmi arc now for a few days but unless I unplug the beam the tv auto selects arc and I get no sound. 
 

beam works fine for all normal streaming - question is whether what’s tripping the arc to auto flip is coming from the beam or the tv - and with no way to tell which it is how can you get support in this mixed environment.

fwiw I will factory reset my tv and my beam later today and not run any updates on either…see how it goes.. but this is busting my nut

My initial thoughts are that the ‘flipping/tripping’ is being caused neither by the Beam, nor the TV, but more likely by another HDMI device connected to the TV that has HDMI-CEC enabled and is attempting to ‘steal’ away the focus from your Beam.

To try to find the ‘culprit’, if you have more than one device connected with HDMI-CEC enabled, is  to disconnect these ‘other’ devices and first ensure the ‘flipping’ stops altogether. Next, add the devices back one at a time and see which one causes the issue. If that’s established, then disable CEC on that one device, or alternatively insert a cec-less adapter into its connection as shown in the link below. All being well, these things should solve your issue.

https://www.lindy.co.uk/cables-adapters-c1/audio-video-c107/hdmi-cec-less-adapter-female-to-male-p7299

I have the same issue with my LG E8  but it doesn't bother me as I rarely use Headphones at night now and just turn switch over to night time listening mode and turn on speech enhancement. 

It would be good if I could just switch on the Sennheiser's and not have this issue.

Hello All,

as there are more and more users facing same issue, can each of you open a support ticket with Sonos ? This is the only way we can push Sonos to finally fix this annoying bug in their software.

Kind regards,

Greg