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I have a Sony Master’s Series XBR-65A9G TV running Android TV version 9.  It is connected to a Sonos Arc (with 2 Sonos one SL speakers for surround).

The Arc is connected to the TV via an eARC port and everything seems to work well most of the time.  I have verified that yes, I can get Dolby Atmos sound from Nexflix so things appear sane.

My issue is… every now and then when I switch to the android streaming app (from my TV/cable box)… the sound cuts out.  Silence.  The only way I can get it to work again is to power cycle the TV.  I manually switch the Arc to use the TV input just to be sure… still silence.  Note that if I switch back to the TV/cable HDMI on the TV the sound works fine.  I suspect this is a TV issue and not a Sonos issue but I was curious if anyone else has seen this issue??

 

HDMI eARC port is set to “standard” format.  Seems to happen no matter if this is set to enhanced format or not.

 

Sounds like a CEC issue inside the TV. I’d recommend first checking for updates to the TV’s firmware, then rebooting the TV by unplugging it from the wall for two minutes. If the issue persists, I’d contact Sony. 

Yes, already confirmed the software has been updated on the TV and the only way I can recover from this is to power cycle the TV.  I have also contacted Sony.

 

I think this TV also has another issue regarding autoplay.  If I have the TV on and use airplay on my iPhone the iPhone will take control of the Arc and play my music.  Now, if I set my iPhone speakers back to the internal iPhone speaker the TV sound does not go back on.  It would be nice if it worked this way but my understanding is that I need to turn the TV off (not UNPLUG but turn it off via the remote) and turn it back on to get autoplay to work.  I do this but still no sound.  I need to actually set the input on the Arc back to TV (via google assistant or the app) to get the sound back.  My *theory* why this doesn’t work is that the TV uses a bluetooth connection for the host and thus never enters a full power off state… thus autoplay doesn’t work.  Autoplay must be looking for the HDMI signal to go invalid then valid again.  To support this theory… if I UNPLUG the TV the sound does indeed come back on (autoplay works).

 

I will test by turning the bluetooth remote off and just use IR.

 

 

This continues to be an issue.  Unpairing the the remote and not using bluetooth did not help.  Here’s a clue… if I switch the the audio output to PCM… I get sound.  Not Atmos… but sound.  I need some help here.  This is all very disappointing.

Note that I also tried “restarting” just the netflix app in Android TV but that did not help.

 

 

Update… if you are having an issue with your Sony A9G update your TV firmware.  I just updated to version v6.4960 dated December 1, 2020 and all the issues I was seeing are gone.  The TV did not auto update… I had to manually download it.  Not sure how they “auto” roll out firmware updates… but this one solves multiple issues for me.  

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