arc not waking out of standby LG C1

There is no ISP equipment just a newer surfboard modem and then orbi is the only router… so no bridge AP I think? Networking not exactly a strong suit for me but will try to look into this all tonight
 

also, wiring the arc directly to the main orbi is not very feasible for my situation. 
thanks

Ah that’s okay I wasn’t sure in which mode you were running the Orbi mesh system - as it’s in router mode, you just wire the Sonos device to the primary Orbi hub/router - if it can’t be done with the Arc, one option is to add the Sonos Boost to the setup and wire that device instead, but remember to do the other things mentioned too, such as keeping it one metre away from the hub and any other wireless devices etc.

ARC being invisible on the controller is separate from any CEC monkey business. There is a network issue. When ARC goes into Standby mode, it should still maintain its network connection -- if the network allows this, and the network should allow this. ORBI should not cast ARC aside. When you reboot ARC it broadcasts a distinctive message that attracts the ORBI’s attention.

I suspect that if you were listening to a music service this connection would go down and the music will stop because it uses the network. Simply playing TV audio does not require any network services or controller activity. TV audio is sent directly over the HDMI connection. The SONOS controller is simply a remote control. Adjusting Volume with a SONOS controller will require network services between the controller and ARC. If you use the TV or COMCAST remote (and have set this up) you can control  ARC’s Volume through the TV’s CEC connection.

If you have not already done this, I strongly suggest that you reserve IP addresses for all regular network clients -- especially the SONOS units.

Have you disabled the ARC’s status (white) lights. If not, ARC will display a dim white status light in the center and, if you have enabled the microphone, a white light off to the right. Unless you are setting up ARC a green status light indicates Mute.

Submit a diagnostic while the system is operating normally and another when ARC is not online. It would also not be wrong to submit a third immediately after ARC comes back online. Keep track of the confirmation numbers and contact SONOS support.

Here we can speculate and share our past experiences, but the diagnostics log details that are only available to SONOS staff. Network issues leave tracks in the diagnostics. Sometimes a staff member stops by here and could comment if you post confirmation numbers here.

Thanks I just got home and powered up the TV… no arc sound (nor signs of “waking up” and the system does not show in the app. I ran a diagnostics 328548354

will try calling… hoping for some confirmation that the boost will solve the issue since that seems to be a simple solution 

Are we 100% certain that an arc that drops the wifi overnight should still play hdmi audio when the tv is turned on?

Yes. The Arc does not require a WiFi signal to play tv audio. Recently my ISP were doing improvements on the network, so I had no internet service. I was still able to listen to the tv audio through the Arc.

Its a different type of connection to the Arc.. one is via HDMI cable, which is an input to the TV and why you should see a screensaver on your TV HDMI-2 port/input, but the audio-out to the Soundbar is over the ARC/eARC link, which is the (enhanced) audio return channel.. it’s why the cable needs heac (HDMI Ethernet and Audio Return Channel) support - the cables are often referred to as HDMI 14+ and most folk here recommend using the cable supplied by Sonos with the product.

The Sonos App and Arc each communicate however over your WiFi network (Orbi). In fact the App uses SSDP (the UPnP simple service discovery protocol) to initially discover the Sonos players and this is done via multicasting via UDP to 239.255.255.250:1900 and, for good measure, broadcasting to 255.255.255.255:1900. 

Thereafter communication is unicast. Allegedly Orbi maybe problematic for this communication if say the Arc is on the 2.4Ghz band (channel A) and the controller device is connected to the 5Ghz band (Channel B) - just as an example. It can mean the communication packets do not always get through to discover the devices on the LAN. 

So the communication between the Arc and TV is unrelated to the communication between your Arc and mobile controller App. Hence that’s why the Boost (wireless SonosNet connection) is only likely to resolve your Arc discovery issue in your Sonos App. I don’t think it would fix the TV autoplay issue, if you are not getting any sound from your TV - I did hope the toggling off/on of ‘TV Autoplay’ in the Sonos App would resolve that for you, but presumably you have tried that with no success?

I think it’s best to resolve the Arc ‘Discovery’ issue first anyway, as you can then use the Sonos App to at least re-enable the TV audio using the TV icon at the foot of the ‘music services’ tab, that’s if we can’t find a way to get the Arc to autoplay the TV audio.

So that’s why I was suggesting to wire a Sonos device to the primary Orbi Hub to see if you can get the SSDP discovery via multicasting working between your controller and the Arc over a SonosNet link rather than your Orbi WiFi.

Hope that all makes sense to you.👍