Session terminated due to error code 0x112f

Question

The error occurred under 2 circumstances:

1. The user worked in the remote app started by the Windows App after a while the connection was interrupted because of protocol error code 0x112f
2. The user couldn’t logon because the connection could not be established due to protocol error code 0x112f

Answer 1

Hi The Khang Nguyen

I understand that while connecting to remote App your are getting error code 0x112f

Check Remote Desktop Client Version & Updates

Make sure your Remote Desktop client is up to date.

If you are on Windows, update via Windows Update or download the latest Remote Desktop client from Microsoft.

Older clients may not properly handle new protocol versions.

Verify Network Connectivity and Firewall

Ensure no firewall or network device is blocking ports required by Remote Desktop usually TCP 3389

Open gpedit.msc

Goto Computer Configuration -> Administrative Templates -> Windows Components -> Remote Desktop Services -> Remote Desktop Session Host -> Remote Session Environment

Change the policy "Use WDDM graphics display driver for Remote Desktop Connections" to Disabled

Reboot

can you please refer these documents:

https://stackoverflow.com/questions/31402343/remote-desktop-connection-protocol-error-0x112f

https://learn.microsoft.com/en-us/answers/questions/292214/protocol-error-code-0x112f-on-local-machine-solved

https://howto.hyonix.com/article/fix-remote-desktop-connection-protocol-error-0x112f-resolved

If you have any further queries, let me know. If the information is helpful, please click on Upvote.Thank you.