How to fix "Because of a Protocol Error Code: 0x112f" error on Windows

In this guide, you will learn how to fix the Remote desktop connection protocol error 0x112f.

When you’re trying to connect to a Windows server you might encounter the error as seen below.

There are three possible issues that are causing this error:

• Resolution error.
• Enabled option “Use all my monitors for the remote session”.
• Persistent bitmap caching is enabled.

How to change the resolution quality

The problem is mainly because of the resolution conflict between the monitor and the RDP client. So, we can change the screen resolution of the RDP session to fix the Remote Desktop protocol error.

Step 1. Search Remote Desktop Connection in the search box and then open it.

Step 2. Once Remote Desktop Connection is open, click on Show Options.

Step 3. Next, navigate to the Display tab. Choose the color to “High color(15 bit)”, and then click on the Connect button.

Reboot the remote PC

Restarting the remote PC may save a large amount of time for you. If the issue still persists, just follow the next solutions.

How to disable bitmap caching

If you are encountering error 0x112f due to Persistent bitmap caching, this section will guide you on how to disable this option in Windows Remote Desktop Connection.

Step 1. Search Remote Desktop Connection in the search box and then open it.

Step 2. Once Remote Desktop Connection is open, click on Show Options.

Step 3. Next, navigate to the Experience tab. Then uncheck the option Persistent bitmap caching.

Then, try to connect to the RDP

How to disable the “Use all my monitors for the remote session” option

If you are encountering error 0x112f due to the setting Use all my monitors for the remote session, this section will guide you on how to disable this option in Windows Remote Desktop Connection

Step 1. Search Remote Desktop Connection in the search box and then open it.

Step 2. Once Remote Desktop Connection is open, click on Show Options.

Step 3. Next, navigate to the Display tab. Uncheck the option Use all my monitors for the remote session.

Finally, try to connect to the RDP by clicking on the Connect button.

Conclusion

In our case after performing the above steps, we did not see the error again.

Hopefully, this article will be useful for you. Good luck!