Sonos Arc Randomly Rebooting

Did you test it on a UPS to eliminate upstream (of the house) power issues?

Any high powered radio systems, HAM or the like near you?

Weather or airport radar dishes?

I could not be more adamant of it being a software related issue with potential hardware impacts (at least for my case). While possible it may have uncovered an issue due to hardware, it couldn’t be more apparent that the manual system update was the invoking factor that revealed the issue for me.

I had disabled automatic updates mainly for this exact fear for so long, with my only reason of updating last night being my beam volume slider annoyingly disappearing randomly for so long and I got sick of it. But my gosh, this issue is so much worse. Spending our anniversary tonight watching the 3 final episodes of a show my partner and I have been so invested and immersed in, just to have it reboot 4 times, each time the sound cutting to silence for 5 seconds, switch to TV speakers for roughly a solid minute, followed by another 5 second silent cutout then back to Sonos, was so devastating, especially in such crucial moments of the plot.

Also spent about 2 hours and 30 minutes on the phone with technical support today looking for any solution or possibility of downgrading. After going as far as factory resetting my entire system on all 9 Sonos devices, still nothing, nor is it possible to downgrade. Then was told my Arc Ultra being some months past the warranty led me to being offered only a 30% discount to purchase a new Arc Ultra. A very frustrating response knowing how none of this would’ve happened if I didn’t update the system for software they pushed out nor my eight other Sonos products in my apartment working post-update flawlessly without a reboot. Hoping the RMA exemption is approved though, for any possibility for resolution.

All in all, the only factor that could have caused this issue for me was allowing an to update the Sonos system last night, specifically the Arc Ultra update to 17.3 (build 90.0-68140). Perfect before that, and now a $1k movie night buzzkill. I wish I wrote down my previous version before upgrading to give comparison/insight of what the cause is.

Hoping for any new findings or resolutions. Please keep us updated of any, as I will the same. Nearly tempted to consider beta software for any possible remedy at this point. Just one day with it like this was unbearable, personally.

I feel you. I wouldnt worry about an RMA as that has not helped in my case. I would like for Sonos to work on a resolution but not sure how to best get them to do that without spending more hours on the phone.  Previous calls havent seemed to produce any positive results. 

None of that near me.  I do have a whole house surge protector. i work from home and have multiple UPS and other devices that would beep on the slightest power issue. Power is solid here.  The arc never loses power. 

Very happy to see that the latest firmware update 17.4 seems to have fixed the issue. (Knock on wood!)

Yes mine has been stable this past week on 17.4 (build 91.0-68261).

I went back to plugging in the Arc Ultra to ethernet and having it the only Sonos device plugged in.  Disabled wifi on the Arc Ultra. Also set all the Sonos devices in the house to keep the same IP (reservation) on the network as well. But most likely was a software update that hopefully fixed the issue since this same setup worked for months previously. 

Confirmed in the Office Hours on Reddit a fix was implemented on latest release.

https://www.reddit.com/r/sonos/comments/1nqc84h/comment/ngcqjtv/?utm_source=share&utm_medium=web3x&utm_name=web3xcss&utm_term=1&utm_content=share_button

Would be nice if the system release notes actually reflected that fact.