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Tried Windows 10 built in wireless display casting feature (Miracast) to connect Ryzen+Radeon PC to laptop as a second screen (project as extended), displays only pure green screen on laptop.

Question asked by heathazedaze on Oct 7, 2020

First time posting here, so apologies if I'm doing this wrong.

Posted on r/AMD Q3'20 Tech Support Megathread, reposted on r/AMDHelp and here for more exposure

Summary of Issue

Attempted to use Windows 10's built in wireless display casting feature (Miracast) to connect Ryzen+Radeon based PC to Intel+Nvidia based laptop to use as second screen. Laptop screen shows up correctly on connect panel, connects successfully. However, laptop displays only green screen. Mouse cursor still visible. Windows such as Edge browser windows can be dragged into second display area and is still interactable, just not displaying properly due to green pure green screen.
As far as my searches go on google and on the subreddit, I haven't found a similar case so I was wondering what may be the problem here. Thanks in advance to all replies!

PC System Configuration

  • Motherboard: ASUS ROG STRIX B450-I Gaming

  • CPU: AMD Ryzen 5 1600AF (Stock Clocks, No Undervolt)

  • PSU: Silverstone SX650-G (650W 80+ Gold)

  • Display(s) (Make, Model and Type):

    • Main PC Display output: Obscure Soniq 32inch 1080p TV (via HDMI 60hz)

    • Extended Display: Lenovo Yoga 720

  • System Memory: 32GB Dual Channel 3200 MHz (Corsair LPX Vengeance CL16)

  • GPU (VBIOS): Sapphire Pulse RX 5600XT 6GB (VBIOS: 017.001.000.049)

  • OS (Version): Windows 10 x64 (Version: 2004 (Build Version: 19041.508))

  • Driver: Radeon Software Adrenalin 2020 Edition 20.9.1 Update: Updated to 20.9.2

  • Applications: Windows 10 Connect Panel (Miracast)

  • Background Apps: Edge Chromium, File Explorer, Telegram, Discord, Steam, Origin, iCue, Xbox App, PowerToys v0.21.1, Epic Games Store, IncrediBuild, Autodesk Desktop App

  • Radeon Software Settings: Instant Replay ON, Instant GIF ON, In-Game Replay ON, GPU Scaling ON, Integer Scaling ON, HDMI Link Assurance ON, Anti-Lag ON, Radeon Image Sharpening ON, Enhance Sync ON

  • WattMan Settings: Auto Undervolt GPU ON

Laptop System Configuration

Lenovo Yoga 720 15inch

Product Page: https://www.lenovo.com/au/en/laptops/yoga/yoga-700-series/Yoga-720-15/p/88YG7000828

Tech Specs summary:

  • CPU: Intel Core i7 7700HQ (@2.8Ghz max)

  • System Memory: 16GB Dual Channel 2133 MHz

  • iGPU (Driver Version): Intel HD 630 (27.20.100.8681)

  • dGPU (Driver Version): Nvidia 1050 GDDR5 4Gb (27.21.14.5638)

  • OS (Version): Windows 10 x64 (Version: 2004 (Build Version: 19041.508))

  • GeForce Game Ready Driver: Version 456.38

Steps to Reproduce

  1. Ensure Wireless Display feature is installed from windows settings (Optional Features) on both devices

  2. Set "Projection to this PC" settings in windows settings to allow projection to both devices

  3. Connect PC (Bluetooth 4.2) and Laptop (Bluetooth 4.1) together via Bluetooth

  4. WinKey+P on main PC, select extend, click on connect to a wireless display at the bottom

  5. Wait for Laptop to show itself on the connect page

  6. Click to connect, enter pairing code and connect

  7. Observe green screen on laptop display. Windows cursor shows and is displayed correctly. Nothing else can be seen. Program windows could be dragged into the second display area but is not displayed correctly.

Steps taken to remedy the issue/troubleshoot

  1. Windows update check on both devices -> No new updates

  2. Install all Intel and Nvidia updates on laptop -> installed but didn't resolve issue

  3. Turn off all Radeon Software Settings -> did not help

  4. Attempted all the steps to reproduce on a friends Intel+Nvidia based laptop (I believe it was an intel i7 6700HQ + GTX 960m combo) with my laptop -> Works as intended, so I'm fairly confident it's something to do with my PC

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