Windows 10: How to get PC to support Miracast?

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  1. Kari's Avatar
    Posts : 14,817
    Windows 10 Pro
       25 Nov 2016 #11

    monster10888 said: View Post
    Hey, OP here. So you are correct, a computer needs to have WiDi support to be able to support Miracast. WiDi support, if I remember correctly, falls in with how old your processor is.
    Miracast is not the same thing than Intel WiDi. All my laptops for instance support Miracast allowing me to cast to one of my two Microsoft Wireless Display Adapters on two different TVs, yet not a single one of my laptops supports WiDi.

    Miracast has also nothing to do with CPU, it's a feature in modern wireless WiFi Direct network adapters (list of WLAN adapters supporting Miracast). Additionally the display adapter must support Windows Display Driver Model (WDDM) (almost all modern display drivers support it).

    For laptop buyers there's a simple "rule of thumb": If the laptop came with Windows 8.1 pre-installed, its WiFi adapter supports Miracast. This is not a factual rule per se, it's just that those laptops manufactured mid 2013 and later usually have WiFi Direct wireless network adapter. Windows supports Miracast starting from version 8.1.

    Desktop owners without built-in WiFi adapter need to check that adapter they get is a Wi-Fi Direct CERTIFIED Miracast device.

    For laptop users like me Miracast is really practical, allowing use of more than one external display. In fact, Edge browser I am using to browse the forums and type this reply is at the moment on an external display connected with Miracast.

    Click image for larger version. 

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      My ComputerSystem Spec

  2.    14 Feb 2017 #12

    Hi Karl

    i tried to ask in another part of the forum but didnt get any replies. I can project to my smart TV (via miracast i guess) using the connect function in Windows as you posted above and it works fine, except that then i can't seem to browse the internet any more. A yellow exclamation mark appears over the wifi icon whilst i'm mirroring my pc screen onto the TV and websites dont load. Once I stop mirroring i can reset the wifi and can surf the net again.

    any ideas how to fix this, else it kind of loses its value? (windows 10 pc, 2 years old, realtek network card RTL8723AU.,
      My ComputerSystem Spec

  3. Kari's Avatar
    Posts : 14,817
    Windows 10 Pro
       14 Feb 2017 #13

    aroon1 said: View Post
    any ideas how to fix this, else it kind of loses its value? (windows 10 pc, 2 years old, realtek network card RTL8723AU.,
    Your system specs says you have a desktop PC. Is the WiFi adapter built-in or do you get WiFi using an external USB WiFi adapter? Do you also have a wired connection available?

    My recommendation is to use wired connection for Internet and only use Wifi for casting to TV.
      My ComputerSystem Spec

  4.    15 Feb 2017 #14

    Hey Karl. Yep it's an all in one desktop with internal network card. If I run dxdiag from the run command it tells me it supports Miracast.

    I could used wired but it's not ideal as I actually move the pic around sometimes. Also it seems like it's clearly possible to stream and cast at the same time so would ideally like to find out what the issue is.

    When I've googled it I've found instances of people talking about similar issues with wifi direct and casting( which I think is what miracast is based on) so there must some people out there who might know what causes it/how to fix it.
      My ComputerSystem Spec

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