Multichannel PCM 5.1 dropping out since 14.10 update

Have you updated the software on your TV? It really shouldn’t make a difference if the blue ray player is connected to HDMI 1 or HDMI 3, they both *should* be acting the same.

Nope no update, I swapped the HDMI port 20 mins into a movie after it was dropping every few mins, and the rest of the movie played with no drops. Very strange.. 

We'll see if it's a long term fix.

Hey fam. I just signed up to comment. I saw your link to the cable. Sadly it's unavailable. I'm in the USA. Can you help me on a cord that is literally the same or similar so I can get when purchasing the Arc? I don't want to get something wrong. I found this one. Is it good?

RUIPRO 8k Fiber Optic

Any one way 2.1 HDMI optical cable should be fine. 

Seeing as there are no new replies I think this still hasn’t been fixed?

we have bought a Samsung wh-q930c for the bedroom (also lg c1) and there’s no issue on that system at all. 

using the optical hdmi still fixes the problem luckily. But lately the screen has been flickering black for 4 seconds before coming back on, as if earc is reapplying.
 

Also have some audio delay issues on live TV lately; only on Dolby digital streams. Channels that use PCM work just fine, but I think thisnactually is an LG issue since the Samsung had the same thing. 

So after seeing the Verge story about the audio popping issue being fixed I wondered whether this ever got resolved. I can’t easily swap my cable out but may try it seeing as there have been a few firmware updates for the LG CX recently, as well as the Beam obviously.

Anybody still monitoring this?

I guess everyone already gave in and bought the one way cable lol. As for my case, I am still experiencing periodic dropouts on HDMI1 so I think it’s still not yet fixed. Sonos did mention that they specifically addressed an issue with Dolby MAT Atmos.

Remember, Sonos denied the Atmos pop issue for years until that The Verge article came out. Then all of a sudden Sonos investigated and fixed a “non-existent” issue that was previously “caused by your TV / PC / Console / Bluray player / HDMI cable / CEC / Atmos / anything but Sonos’ product.” It would take a The Verge article-level of miracle to get Sonos to fix this issue.

Coming to this late but wanna add my experience here. LG G2, Beam Gen 2 via e-Arc, 4K Firestick in HDMI 1, PS5 in 3 and Nintendo Switch in 4.

Firestick works FLAWLESSLY. No drop outs, 5.1, 7.1, Atmos all work great. PS5 works perfectly when playing games, but trying to watch a Blu Ray is a lottery whether it will play (only after TV hardware reset) drop out intermittently (sometimes not coming back at all) or just no sound from the off. Nintendo Switch audio drops out for a second every couple of minutes.

With the Blu Ray issue being fixed by a TV hard reset I initially thought it might be a TV issue, but I used a SONY soundbar via e-Arc before with absolutely no issues. I thought the Sonos would be an upgrade but this issue is making me strongly consider returning it. This is not budget equipment, I shouldn’t have to lose my evenings trying to get it to work properly…

The HDMI 1 workaround is not perfect as I’ve always gotten around one or two dropouts every hour with PCM 5.1. Perhaps you just haven’t noticed or you’re lucky that yours hasn’t bugged out yet.

I also used a Sony earc soundbar with no issues before “upgrading” to the Beam. Since you have multiple devices that make use of PCM 5.1, I suggest that you either buy the fiber optic cable or simply return your Beam. Personally, I’d go with the latter as Sonos has already lost my trust. From what we’d seen from the Atmos pop (and this) issue , they’d just sweep things under the rug and deny any wrongdoing unless it has garnered widespread media attention.

Don’t know if it’s even an HDMI 1 workaround, tried the PS5 in HDMI 1 and it didn’t solve the issue. The Firestick just seems to deal with issues better than any other device. It’s by far what I’ve used most since I got the Beam so I think I would’ve noticed dropouts, but as you say it just might not have bugged out yet. I’ve also experienced some other weird quirks with it - If I have the Firestick set to “best audio possible” I get no sound when I set the Nintendo Switch to surround, full audio on stereo, but if I set the Firestick to PCM, I get surround on the Switch, but it regularly drops out. There was a brief moment where everything worked perfectly (Switch and PS5) if I disconnected the Firestick completely, but then that seemed to stop working too…

I’m gonna try the cable as I get get one for £11 on Amazon in the UK, more out of curiosity than anything, but maintain that it’s unacceptable for a product to come with a cable and for me to still have to purchase one separately to get it to work properly. Was looking into alternatives if I do choose to refund and the closest comparable device seems to be the Bose 600, but the more I look into that the more I see pages and pages of people complaining that it doesn’t work properly with LG TVs! Starting to think my basic SONY soundbar worked so flawlessly because that’s all it was - just a decent soundbar, no bells or whistles. While I don’t think it is a TV issue, it seems that some of the blame has to lie with LG here - there are too many variables for this to simply be “the Beam can’t do 5.1”