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.
- 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.
- On your desktop computer, Run mstsc.exe.
- In the Remote Desktop Connection window, click Show Options.
- Click the Experience Tab.
- In the Experience tab, uncheck Persistent bitmap caching.
- Click the General tab and click Save.
Disabling UDP for the RDP Client
Windows Home with regedit.exe
In your File Explorer:
- Go to HKLM\SOFTWARE\Policies\Microsoft\Windows NT\Terminal Services\Client\.
- Create dword fClientDiableUDP.
- 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.