Issue: A user is experiencing remote desktop protocol (RDP) issues such as:

• Intermittent connection 
• Unable to connect
  • Often prompts the Protocol Error (code 0x 112f)
• Black screens
• Distorted display

Environment: Remote Desktop

Resolution: The procedures below successfully address a wide variety of remote desktop issues. Complete each procedure before requesting diagnostics. Have a member of your IT team:

If the remote desktop has issues after completing all procedures below, Contact support for further assistance.

Clearing the RDP Bitmap Cache

*Note: All remote desktop sessions must be shut down before clearing the RDP bitmap cache.

1. In your File Explorer, Go to C:\Users\<username>\AppData\Local\Microsoft\Terminal Server Client\Cache and Delete all file contents.

Disabling the RDP Bitmap Cache

After clearing the RDP bitmap cache you can disable the cache to prevent future issues.

1. On your desktop computer, Run mstsc.exe.

2. In the Remote Desktop Connection window, click Show Options.

3. Click the Experience Tab.

4. In the Experience tab, uncheck Persistent bitmap caching.

5. Click the General tab and click Save.

Disabling UDP for the RDP Client

Windows Home with regedit.exe

In your File Explorer:

1. Go to HKLM\SOFTWARE\Policies\Microsoft\Windows NT\Terminal Services\Client\.
2. Create dword fClientDiableUDP.
3. Assign a value of 1.

Windows Pro with gpedit.msc

Computer Configuration > Administrative Templates > Windows Components > Remote Desktop Services > Remote Desktop Connection Client.

In Remote Desktop Connection Client, Enable the Turn Off UDP On Client option.