mircast 无线 p2p 投屏连接失败，p2p 连接 widow未发出 provision discovery request 帧

Question

window 10 笔记本通过无线 p2p 投屏，投屏过程中点击电脑重启，重启后尝试再次投屏，连不上投屏设备，抓空口数据是笔记本电脑未发出 provision discovery request 帧，导致连接无法执行完，请问电脑发 provision discovery request 帧条件是什么？以便我们尝试兼容。

注：这个问题在不同品牌的电脑都是必现。

Answer 1

Try on these steps bellow and test again for the result :

• Restart WLAN AutoConfig and Clear P2P Groups

net stop wlansvc 
net start wlansvc

Then delete any persistent P2P groups:

netsh wlan delete profile name="DIRECT-*"

• Reset Network Stack

netsh int ip reset 
netsh winsock reset 
ipconfig /flushdns 

==> Restart your PC.

• Check for Pending P2P Sessions in Registry because sometimes ghost P2P devices are stuck somewhere
  Open Registry Editor:
• Navigate to : HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\WlanSvc\Interfaces\
• Delete or export/backup stale entries under interfaces or P2P.

==> Then restart.

• Reinstall or Reset Wi-Fi Driver

Open Device Manager

Right-click your Wi-Fi adapter → Uninstall

Reboot or reinstall latest driver from the vendor

• Ensure the Receiver Is Advertising

Use Wireshark in monitor mode and filter for: wlan.ssid contains "DIRECT"

*Make sure the receiver is broadcasting its P2P-SSID.

If not, power cycle the sink device.

• Force Miracast Reinitiation because sometimes Windows caches previous failures. To do this:

Open Settings > Devices > Bluetooth & other devices

Remove the receiver device under Wireless displays

Retry projection from scratch (Win + K or Project > Connect)

• Use netsh wlan show p2p to Check State and inspect if P2P discovery is running

netsh wlan show wlanreport 
netsh wlan show p2p device 
netsh wlan show interfaces

And the root cause for "Windows P2P Stack Can Become Stuck" may cause by an abrupt reboot, the P2P driver stack can remain in a broken or uninitialized state, especially if the shutdown happened during:

Group Owner negotiation

Active streaming

Soft AP teardown

So no PDR is triggered in future sessions unless forced reset of the WLAN stack occurs.