Miracast quality bad when bluetooth is turned on

Question

I tried to Miracast to a display. The adapter was right next to the Surface. The picture always had some issues and wasn't clear, until I disabled bluetooth. But then I wasn't able to use my pen as a clicker, so that's not a solution. What can I do?

Answer 1

When Miracast connects to a 2.4GHz network, it shares the 2.4GHz band with

Bluetooth. The specs for these two protocols share the same channels. If you

have a dual band router, and you are connected to the Internet using 5GHz, you

may find some relief. You can't use the clicker until the Miracast session is

established. Miracast negotiates over 2.4 but CAN connect over 5GHz. I wrote

this up a few years ago

https://digitalmediaphile.com/index.php/2015/02/05/how-miracast-communicates-over-wifi-networks/

>I tried to Miracast to a display. The adapter was right next to the Surface.

The picture always had some issues and wasn't clear, until I disabled bluetooth.

But then I wasn't able to use my pen as a clicker, so that's not a solution.

What can I do?

Answer 2

When Miracast connects to a 2.4GHz network, it shares the 2.4GHz band with

Bluetooth. The specs for these two protocols share the same channels. If you

have a dual band router, and you are connected to the Internet using 5GHz, you

may find some relief. You can't use the clicker until the Miracast session is

established. Miracast negotiates over 2.4 but CAN connect over 5GHz. I wrote

this up a few years ago

https://digitalmediaphile.com/index.php/2015/02/05/how-miracast-communicates-over-wifi-networks/

>I tried to Miracast to a display. The adapter was right next to the Surface.

The picture always had some issues and wasn't clear, until I disabled bluetooth.

But then I wasn't able to use my pen as a clicker, so that's not a solution.

What can I do?

I know it's not you who came up with it, but it seems stupid to me that I have to connect to a router to chose my band. I can't carry my router around everywhere when I might need to use Miracast. It shouldn't be too hard to make a toggle.

But thanks for the solution, at least I know whats up.

Answer 3

Hi,

The setup may be pretty challenging because of the current structure of connections. We're glad you found MVP Barb Bowman's answer helpful. If you feel that this concern needs further attention, we recommend you create a feedback using the Feedback Hub app to raise this to the developers who can work on improving the Miracast feature of Surface devices. This link will show you how to use the suggested app.

You can always reach out to the Community if you encounter other concerns.

Regards.

Answer 4

it is a protocol thing. they share the 2.4GHz channels. there is nothing Surface

or Windows can improve. the Wi-Fi Alliance certifies standards.

> raise this to the developers who can work on improving the Miracast feature of Surface devices

Answer 5

it is a protocol thing. they share the 2.4GHz channels. there is nothing Surface

or Windows can improve. the Wi-Fi Alliance certifies standards.

> raise this to the developers who can work on improving the Miracast feature of Surface devices

I'm not very familiar with this, but wouldn't placing a dedicated Bluetooth adapter further away from the Wi-fi adapter help with this? I have had devices that can use Bluetooth and Miracast at the same time, so I guess there are solution for this when designing a device.