树莓派3连接笔记本电脑故障求助：远程桌面连接失败

Hey there, let’s work through this RDP problem together—you’ve successfully connected before, so we just need to track down what’s changed. Here’s a step-by-step breakdown to get you back up and running:

1. Get the Raspberry Pi’s Real IP Address First #

The multiple IPs tied to raspberrypi.mshome.net are probably outdated DNS records, so let’s skip the guesswork:

• If you can hook a monitor directly to your Pi, open the terminal and run hostname -I—this will spit out its actual active IPv4 addresses, no middleman needed.
• If you can’t access the Pi directly, log into your router’s admin dashboard (usually via 192.168.1.1 or 192.168.0.1). Look for a "Connected Devices" list; your Pi should show up as raspberrypi with its current IP next to it.

2. Clear Stale DNS Cache on Your Laptop #

Those conflicting IPs from Advanced IP Scanner are likely cached on your laptop. Let’s fix that:

• Open Command Prompt (CMD) as an administrator, then run:
  • ipconfig /flushdns to wipe old DNS records
  • nslookup raspberrypi.mshome.net to recheck what IP the domain resolves to now
• If it still shows multiple IPs, just use the real Pi IP you found in step 1 for your RDP connection—no need to rely on the domain anymore.

3. Test Basic Network Connectivity #

Before diving into RDP settings, make sure your laptop and Pi can talk to each other:

• In CMD, ping the Pi’s real IP with ping [your-pi-ip-here]
  • If you get successful replies, the network is solid—move on to checking RDP services.
  • If ping fails, confirm both devices are on the same WiFi network. Also, check if your Pi is actually connected to WiFi (router dashboard can confirm this too).
• If your Pi uses a firewall (like ufw), make sure RDP port 3389 is open: run sudo ufw allow 3389 on the Pi’s terminal.

4. Verify RDP Service is Running on the Pi #

Most Pi setups use xrdp for RDP—let’s make sure it’s working:

• On the Pi’s terminal, run sudo systemctl status xrdp
  • If it says active (running), great. If not, start it with sudo systemctl start xrdp and set it to auto-start on boot with sudo systemctl enable xrdp.
• Quick check: ensure your Pi user account is allowed to use RDP. Open the xrdp config with sudo nano /etc/xrdp/xrdp.ini—you shouldn’t see any lines restricting specific users (default settings allow all valid accounts).

5. Double-Check Your RDP Client Settings #

Sometimes small settings glitches cause issues:

• In Remote Desktop Connection, make sure you’re entering the correct Pi IP (not the domain if it’s acting up).
• Click "Show Options" → go to the "Local Resources" tab. Confirm that keyboard and mouse options are enabled—occasionally these mappings get messed up and block connections.
• If you saved credentials before, try unchecking "Allow me to save credentials" and re-enter your Pi’s username/password manually (old cached credentials might be invalid).

内容的提问来源于stack exchange，提问作者Ezza Ali