I use a Google Wifi mesh with the primary point in the living room and one point in my bedroom and the other in the kitchen. The primary point connects to a TP-Link switch and this switch is connected through the walls via Ethernet to the two other Wifi points.
My Chromecast Ultra is in the living room and connected via Ethernet to the switch. I've had no issues with using the Stadia Controller wirelessly with the wired CCU. However, when I use my laptop in my bedroom, connect it via Ethernet to the wired Wifi point, and try to connect the Stadia Controller wirelessly, the controller buzzes as if it worked for a sec, then buzzes crazy and flashes yellow. Basically, it doesn't work.
I am able to connect the controller when the laptop is on Wi-Fi. Also, a neat "fix" is to first connect the controller when the laptop is on Wi-Fi and then plug in the Ethernet to the laptop. This works, but sometimes the controller just ends up disconnecting mid-way through a game.
Below is a list of what I've tried:
Doesn't work:
Laptop > Ethernet > Bedroom Wifi point > Ethernet > Bedroom wall port > Ethernet > Switch > Ethernet > Primary Wifi point
Laptop > Ethernet > Bedroom wall port > Ethernet > Switch > Ethernet > Primary Wifi point
Works:
Laptop > Wi-Fi
Laptop > Wi-Fi > Connect controller > Plug-in Ethernet
Laptop > Ethernet > Switch > Ethernet > Primary Wifi point
The last bullet above is what stumps me. I am able to get it to work when the laptop is wired directly to the living room switch but not in my bedroom. I'm guessing this is also why my CCU "just works." Edit: So I tested this method again with the laptop connected to the switch and now it doesn't work. Lol
I've also tried testing where the laptop is connected via Ethernet in the bedroom and the controller is in the living room (connected to the primary Wifi point) and that doesn't work. But having the laptop over Wi-Fi in the bedroom and the controller over Wi-Fi to the primary point does connect.
Anyways, sorry for the long post, I just wanted to provide ample amount of details for troubleshooting. Does anyone know where exactly the problem lies? Would it possibly be something wrong with the wall Ethernet?
Is there a way you can make the ethernet anda wifi networks have the same name? Because my Ethernet cable is connected to my router /not the modem, it works fine because the network name is the same on both devices.
Have you solved this yet?
I have a similar set up and I have a couple of suggestions.
First off, this works for me:
Laptop > Ethernet > Switch > Ethernet > Garage Wifi point > Ethernet > Powerline Adapter > Mains > Powerline Adapter > Ethernet > Switch > Ethernet > Primary Wifi point
When I had both the laptop and the garage wifi point plugged into the switch which was then directly connected to the powerline adapter, it didn't work.
One thing to watch out for, is that your controller is not connected/connecting to the wrong wifi point. If the wifi signal in your bedroom from your primary wifi point is visible, the controller might connect to that (I had issues when my two wifi points were too close). This is especially true if you have your controller turned on near the primary wifi point then walk to your bedroom and don't restart it.
Now really it shouldn't matter which wifi point it is connected to, sounds like a bug that google needs to sort out between stadia and the wifi team....
I just got help from support. At least for my Asus router, when my computer is on ethernet, the Stadia controller has to be connected to the 2.4ghz wifi band.