E-arc dropouts and no Dolby Atmos

No, neither my Samsung or LG are experiencing dropouts on eARC. 

What are you using to drive what you’re watching? Have you updated that and the TV itself recently?

Have you refreshed your system by unplugging both the TV and your Sonos from power recently, plugging back in the TV, waiting two minutes, then plugging in the Sonos?

No issues on my Sony TVs.

Maybe give us some more information? 

Thanks for your response Bruce. Lost power For an hour or so, Went back to audio settings on the TV and realized it was set to PCM. selected pass-through, and all is fine now except still not receiving Dolby Atmos.

I’m somewhat familiar with power losses, living on an island in Puget sound which has a seemingly single connection to the grid. And yes, sometime they change settings, due, I suspect, to things not being ‘clean’ always, when the power comes back on.

I’d be tempted to check the TV and the Sonos for updates, and apply them if there are any. Then, I’d unplug both the TV and the Sonos from power. As a safety precaution, reboot your router. Wait two minutes, then plug in the TV. Wait another two minutes, then plug in the Sonos. Wait yet another minute or two for the Sonos to boot up, then test. Make sure the content is in Atmos, of course…a recent movie on a channel that provides Atmos content. Most TV shows don’t.

If it still isn’t working, I’d submit a system diagnostic within 10 minutes of experiencing this problem, and call Sonos Support to discuss it. Don’t post the resulting diagnostic number here.

There may be information included in the diagnostic that will help Sonos pinpoint the issue and help you find a solution.

When you speak directly to the Support staff, they have tools at their disposal that will allow them to give you advice specific to your network and Sonos system.

Thanks again for your support bruce. Sonos reached out and suggested getting back in touch with them to send diagnostics. thanks again!