Can't connect to wireless display when using 5Ghz Wi-Fi

[Fcarenborn]

Issue:
When we connect our computer model to a 5Ghz Wi-Fi network, we can not use the wireless transfer of image and sound to a Miracast product. But when we use 2.4Ghz, it works. If we have used 5Ghz network once, we need to reboot the computer for 2.4Ghz to work again. When that does not work, we get the message "Could not connect." The Intel WiDi log never starts (never visible).

Method: When we create a connection, we use Windows log + P. Then select "Connect to a wireless display". There we choose the Miracast product. We've also gone through Settings, Devices, Add, Wireless display and selected Miracast product to connect to it.

Miracast Products:

Microsoft Wireless Display Adapter (P3Q-00004)

HP Wireless Display Adapter (J1V25AA # ABB)

Affected computer models:

HP EliteBook Folio 9470m
- Intel Core i5-3427U 1.8Ghz
- Intel Centrino Advanced-N 6235
- Intel HD Graphics 4000

Things we tested:

• We have tried using our own image of Windows 10 (1703)
  · We have also used a clean install of Windows 10 (1703)
  · We have downloaded the latest drivers from Intel, HP and Lenovo. Also tested older versions.
  · We have updated with Windows update to latest. Also tested without.
  · DxDiag shows "Miracast: Available, with HDCP"
  · Netsh wlan show driver shows "Wireless Display Supported: Yes (Graphics Driver: Yes, Wi-Fi Driver: Yes)"
  · We have tested the update to the latest BIOS version. Also tested older version.
  · Miracast products are updated to the latest version. Also tested older version.
  · I have read that Miracast always begins with a "handshake" above 2.4Ghz. It seems that just the "handshake" does not succeed while we use 5Ghz.
  · We tested installing a USB WLAN adapter. It did not work with this either.
  · We can see that Microsoft Wi-Fi Direct Virtual Adapter is installed on your computer. It should be the adapter used for Miracast transmission

This is a very strange problem and we are in great need of help. Please contact me if you want to help us professionally.