The RDP ActiveX control may be malfunctioning due to a conflict with the Windows 8 Video app, which is responsible for playing HD videos. This incompatibility can cause the protocol error and subsequent disconnection of the remote session.Another possible cause could be related to the resolution set

How do I fix: Using Windows Media Player for HD video playback?

Step 1: Open Windows Media Player and add the HD video file to play.Step 2: Play the HD video using Windows Media Player, which should not trigger the protocol error.Step 3: If playing with Windows Media Player resolves the issue, it may indicate a problem with the RDP Video app or the resolution se

Software⏱️ 3 min read📅 2026-06-11

How to Fix 0x112f Error – RDP session error: because of a protocol error (0x112f) the remote session will be disconnected

Q: Best Solutions to Fix It Enabling bitmap caching persistence?

Step 1: Open the Remote Desktop Connection (RDC) settings and navigate to the Advanced tab.Step 2: Check if the 'Bitmap caching persistence' option is enabled. If it's not, toggle it on.Step 3: Restart the RDP session after enabling the option.

RDP session error: protocol error (0x112f) causing disconnection when playing HD video with Win8 Video app.

Quick Answer: Try using Windows Media Player to play the HD video instead of the Win8 Video app.

📋 Table of Contents

⚠️ Common Causes
✅ Best Solutions to Fix It
✨ Wrapping Up

A protocol error (0x112f) causes an RDP session to disconnect when playing a high-definition (HD) video through the RDP ActiveX control on Windows 8 Pro machines. This issue is frustrating, as it can disrupt remote work or access sessions. In this guide, we will explore possible root causes and provide steps to resolve the problem.

The exact cause of the error may lie in the resolution or playback settings of the HD video, but it's not fully understood. Fortunately, there are potential solutions that can help resolve the issue.

⚠️ Common Causes

The RDP ActiveX control may be malfunctioning due to a conflict with the Windows 8 Video app, which is responsible for playing HD videos. This incompatibility can cause the protocol error and subsequent disconnection of the remote session.
Another possible cause could be related to the resolution settings or video codec used by the RDP ActiveX control, which may not be compatible with the playback requirements of the HD video.

✅ Best Solutions to Fix It

Enabling bitmap caching persistence

Step 1: Open the Remote Desktop Connection (RDC) settings and navigate to the Advanced tab.
Step 2: Check if the 'Bitmap caching persistence' option is enabled. If it's not, toggle it on.
Step 3: Restart the RDP session after enabling the option.

Using Windows Media Player for HD video playback

Step 1: Open Windows Media Player and add the HD video file to play.
Step 2: Play the HD video using Windows Media Player, which should not trigger the protocol error.
Step 3: If playing with Windows Media Player resolves the issue, it may indicate a problem with the RDP Video app or the resolution settings.

✨ Wrapping Up

To resolve the RDP session disconnection issue when playing HD videos, try enabling bitmap caching persistence in the RDC settings. If that doesn't work, using Windows Media Player for playback might help. Additionally, investigating and adjusting resolution settings or video codecs may also be necessary to resolve the problem.

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