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Miracast

Having trouble getting MS support to give you a link to a HOTFIX work around

 

Here’s a trick if you are desperately trying to get your hands on a hotfix from Microsoft that requires you to contact support and are getting a run around. Do this at your own risk. Make sure you need the fix and have created a restore point if things go wrong. I won’t support you and Microsoft won’t support you.

 

You need to know the KB number of the hotfix you need. Find a hotfix (OK, I’ll do it for you) for a different item where the download is available without going through contacting support again. Like http://support.microsoft.com/en-us/kb/2955769

find one

Click the Hotfix Download Available button.

 

After selecting that link, an URL will appear in the address bar like https://support.microsoft.com/en-us/hotfix/kbhotfix?kbnum=2955769&kbln=en-us

Copy the URL in the address bar and paste into Notepad.

Replace the KB 2955769 number with the one you are having difficulty getting. So that you have a link like https://support.microsoft.com/en-us/hotfix/kbhotfix?kbnum=XXXXXXXX&kbln=en-us where XXXXXXXX is the KB number you are having trouble getting.

Now you can get your hotfix.

Again, I won’t support you and Microsoft won’t support you, but maybe you can fix your problem without multiple calls to support and incompetent poorly trained support agents.

How Miracast Communicates Over Wifi Networks

 

Miracast adapters like the Microsoft Wireless Display Adapter and the Netgear PTV3000, etc. negotiate a connection with the source device. To do this, they broadcast a message that basically announces that they are available for a connection. To do this, the adapter will use one of the three non-overlapping 2.4GHz 802.11 channels (1, 6 and 11) which in essence are the lowest common denominator and would be the most broadly available and used channels. (For this reason, if you are on a device that allows 5GHz only connections and suppresses 2.4 GHz, you cannot connect). Therefore, 2.4GHz is a requirement to negotiate a connection using Miracast.

1. If 2.4GHz is the only frequency supported by your router, then issues might occur due to saturated channels from nearby routers in your environment. You might try changing the channel on your router to see if conditions improve. To see all the Wireless channels nearby, open a cmd prompt and type:

netsh wlan show networks mode=BSSID [press Enter]

2. If you are connected to your router using a 5GHz channel, the Miracast frequency can be negotiated to use 5GHz (but remember, the negotiation initiates over 2.4 GHz).

3. If you are not connected to a WiFi network, the Miracast connection will always be negotiated on 2.4 GHz

A Miracast session creates a virtual, second network on a direct, peer to peer basis between your host computer/device and the target Miracast display/Miracast enabled TV/Miracast adapter. You can see this in the Network and Sharing Center in Windows 8.1 after a connection is successfully made:

 

miracast virtual adapter

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