Multichannel PCM 5.1 dropping out since 14.10 update

15.5 update hasn’t resolved the problem. I don’t know if this info is of any help to anyone, but I unplug the HDMI cable from the EARC port on my lg cx a couple of times and it seems to fix the issue. But only for a couple of days to a week, then the dropouts start again, this is the third time I have tried this in recent weeks.

Have you reached out to LG, as suggested in the earlier Staff answer to this thread?

Yes I have, they suggested getting in contact with a local repairman as my warranty is out of date and then offered a 10% discount code. They didn’t offer any information on this issue, just that they are aware of the problem. I also contacted Sonos support, they suggested using a cec-less hdmi cable/adapter which didn’t work. 

@Manofgeek,
Maybe try using an audio extractor instead and bypass the LG TV altogether. Here are some ‘example’ extractors I’ve seen mentioned in the community here and elsewhere, but I do suggest you research them before any decision to purchase.

I can’t see any reason why such devices would not solve your issue. I actually use one myself on a TV that has no eARC port.

HDFury Arcana

https://www.hdfury.uk/product/hdfury-arcana/

Feintech VAX04101 (I have this device)

https://feintech.eu/en/collections/hdmi-topseller/products/feintech-vax04101-hdmi-earc-pass-switch-4x1-for-soundbar

OREI HDA-931 or OREI HDA-935

https://www.orei.com/products/dual-hdmi-earc-audio-extractor-converter-4k-60hz-18g-hdmi-2-0-arc-support-hda-931

https://www.orei.com/products/dual-hdmi-earc-audio-extractor-4k-60hz-with-optical-port-3-5mm-jack-18gbps-bandwidth-hda-935

Ezcoo

https://www.amazon.co.uk/Splitter-Soundbar-Bi-direction-Breakout-HDCP2-2/dp/B0BBZGPT6F

Thank you for the links I will do some reading on these products. Not sure if using one of these will affect the performance of my game consoles for example, HDMI 2.1 features.

For those that aren’t aware, I posted a work around a few months back. Everyone who has reported trying it has confirmed it works. I’ve not had an issue since doing this. 
 

You need a one way optical HDMI 2.1 cable between the Beam and the TV with the TV at the source end of the cable. This will stop the drop outs. CEC will still work. The only missing feature are the images (screen saver?) sent from the Beam to the TV - which is a pointless feature anyway. These cables are not expensive. The one I bought from Amazon UK was £17 (about $20). If you want more info, read from my post on page 11 onwards. 

Thank you, I have just purchased from your link. I will report back once I’ve tested it. It’s very frustrating that more money has to be spent on this issue.

Hi 

So I have had a LG c1 for over a year no issues.

HDMI 1 has xboxs series x

HDMI  2 has the beam

HDMI 3 has the NSwitch

HDMI 4 has the PS5

Updated my beam gen 2 to latest and greatest software today and all of a sudden the audio on the switch is cutting out. Tried moving it to HDMI 1 and issue gone.

I don't see how this could be the TV as only thing that's changed is the Beams Software between yesterday and today.

Really weird 

So I Almost bought the beam gen 2 with sub mini and surround speakers. Specifically for gaming on switch and watching media on Apple TV.  I have an LG C1. 

As long as this isn’t fixed I won’t be buying, it feels like being bullied into buying a more expensive arc and then having to buy the more expensive sub as well. 

I use my switch on hdmi 1, but the atv on 3. So I would always have to pick which device can have the dropouts? No way. 

I think the fault is 50/50 between Sonos and LG though. I know my series X reported 5.1 LPCM support last year, now the screen says unsupported in the TV info screen. However; that would still not explain why only the beam has this issue. 


So; any recommendations for another setup?

So I did buy the beam gen 2 with sub mini and one SLs and they’re great!

However; I’m also experiencing the issue described in this thread. Apple TV on 5.1 lpcm has dropouts every minute, Switch and Xbox as well. On HDMI 1 the dropouts happen as well but less frequently (experienced 1 in an hour). I already ordered an optical cable because of this thread and it can come tonight or tomorrow so I’ll be reporting back on the issue soon. 

Using WebOs Netflix and Prime solves the lpcm issue that plagues the HDMI ports for me as a workaround until then and I’ve put the Apple TV on Dolby digital (which sounds a bit less good than Atmos but at least I don’t have to switch when I accidentallly pick a 5.1 YouTube video). 

Im based in the Netherlands, own an LG C1 55”. I’ll be sending some diagnostics as well, but I think I would have to make a new thread for new diagnostic files?

sidenote; as I’ve written somewhere before. When I use my Apple TV 4K as an eARC device I do NOT get dropouts from 5.1 and the 1111111 menu of the LG C1 does report proper lpcm 5.1 as well. (Since the Sonos is somehow fixed by cutting out video?)