No Video on DisplayPort to HDMI Daisy Chained Display from a P2422HE Monitor

Summary: The following article provides information about a no video fault on secondary monitors. The issue is seen when you link through your primary P2422HE monitor using DisplayPort to HDMI.

This article applies to This article does not apply to This article is not tied to any specific product. Not all product versions are identified in this article.
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Symptoms

The secondary display gives no video when you connect through the primary display

 

You may experience the following issue with your P2422HE monitor. There is a video issue when you connect a second display through your monitors DisplayPort (DP) port. There is no video seen on the second monitor when you connect through your primary monitor under the following circumstances:

  • You use a DP to High-Definition Multimedia Interface (HDMI) cable.
  • You plug the DP connector to the primary monitor and plug the HDMI connector to the second monitor.
  • You enable the DP Multi-Stream Transport (MST). (This is what allows Daisy Chaining.)
Note: Dell has confirmed that video is seen on the secondary display if MST is disabled. However, the video only duplicates the video that is shown on the primary monitor.

Cause

The DP devices plug status indicates what the ports connection status over the DP source (TX) is.

The plug status of the other devices indicates the type of connection and the status of the connection when you populate those ports. (HDMI, Digital Visual Interface (DVI), and Video Graphics Array (VGA).)

The plug status of the other devices reports 0, which is not correct. Dells Engineering team updated the scaler firmware (FW) to modify its behavior.

Resolution

The latest scaler firmware resolves this problem.

Note: You must have administrator-level access on your computer to install firmware and to change anything in your operating system.

  1. Go to the P2422HE monitors Drivers & Downloads support page and update the scaler firmware under drivers for Operating System Deployment to Dell P2422HE Monitor ISP FW Release, version A00 or newer. To download and install the Dell_P2422HE_FWUpdate_Mxx209_Windows.exe, see the following Dell Knowledge Base Article for installation instructions:


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Affected Products

Dell P2422HE
Article Properties
Article Number: 000211396
Article Type: Solution
Last Modified: 30 Jan 2025
Version:  3
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