Chromecast device not visible in Roon Web Displays (ref#IX4GCM) [Ticket in]

Hi! What’s not quite right with Roon?

· None of the above quite fits

None of the above quite fits

· None of these quite match

Tell us what's going on

· Chromecast device (LG OLED 83C31LA) Not visible in ROON Web Displays

Tell us about your home network

· UNIFI Dream Machine SE 2024 + Network + no VPN + no VLAN

Hi @bernhardt.home, welcome to the Roon Community :waving_hand:

Thanks for the details.

To clarify first — could you please check and share the exact webOS version running on your LG OLED 83C31LA?

Not all LG webOS versions support native Chromecast, and Roon Web Displays can only discover Chromecast-capable devices when the Chromecast service is actually present and active on the device.

Once we know the webOS version, we can confirm whether this model/OS combination should be discoverable by Roon or if this is an expected limitation.

Hello! Chromecast Service is available over other units but ROON does not reach it. See the screenshots.


Hello, @bernhardt.home.

Thank you for the update.

Please check if the TV is available in Settings → Audio → Chromecast.

Hello,

No, it is just visible as an AirPlay-device. it hast only been visible for a short moment as web display/ chromecast audio device in the past. Never again.

Hi @bernhardt.home,

How is the TV connected to your router, as well as your Roon Server?

Is there an option to update the firmware on the LG?

From a recent Roon Server diagnostic report, we can see that Roon does initially see the LG via Chromecast successfully:

Info: [cast] discovered CastDevice[DeviceId=OLED83C31LA-..._googlecast._tcp.local, Name=OLED83C31LA, Address=192.168.1.47] 

It then fails to classify the device:

Trace: [devicedb] [autodetect] No Match for DeviceAutodetectData[Type=Cast Model=OLED83C31LA]

This tells us Roon’s device database does not recognize this Chromecast as a valid Cast endpoint, so the TV advertises itself, but does not present the expected Cast profile.

A few additional troubleshooting steps for you to try:

  1. Perform a factory reset on the TV
  2. Temporarily check and disable IPv6 within your router settings

Let me know if either help, thank you! :folded_hands:

I use an external Chromecast Ultra to display Roon
on my LG Oled G2 , this setup i found was better than the tv’s pre installed Chromecast.

Hello! There is no update available. I tried several things, in clouding hard-/ softreset and ipV6 en-/disabling. Nothing works at the moment.

Hello @bernhardt.home,

Thank you for your patience and for trying the suggested steps.

We’ve reviewed the diagnostics and confirmed that while the TV advertises itself as a Chromecast device, it does not expose a Chromecast profile that Roon can reliably classify as a supported Cast endpoint. We’ve reported this behavior internally to our R&D team for further review.

That said, since this appears to be a model-specific behavior tied to the LG TV’s Chromecast implementation, and not a widespread issue across Chromecast devices, any potential fix would likely take a significant amount of time and may ultimately depend on changes from the TV manufacturer.

At this point, the most reliable workaround remains using an external Chromecast device (such as Chromecast Ultra), as noted by another user in the thread.

We appreciate you bringing this to our attention and helping us document the behavior.

Thank you very much!

Hello @bernhardt.home

Thank you for the update. As soon as I have more information from the R&D team, I will update you here.

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