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
In the General tab:
- 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.