Monitor Flickers when Connected through the Dock and Dell 16 DC16251 Laptop Changes State

Summary: The following article provides information about a flicker seen on external monitors connected through the WD19 or WD19S dock. The flicker is seen when the laptop changes power state.

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Symptoms

The external monitor flickers when the laptop changes power state

 

Flickers, white lines, or on-screen garbage can be seen on your external monitor under the following circumstances:

  • The external monitor is connected through a WD19 or WD19S docking station.
  • The dock is connected to a Dell 16 DC16251 laptop.
  • The on-screen lasts for a split-second whenever the laptop changes power states between sleep, hibernate, restart, or shutting down to off.

Cause

There is a brief signal drop during the power state change. The on-screen issue occurs during this signal drop. This is due to the Multi-Stream Transport (MST) dock being designed to use a line buffer.

Resolution

Note: The hardware is all working as designed.

This is the expected behavior from the monitor under these circumstances. It only happens for a brief moment when making a power-state change. It does not affect using any of these hardware devices in any way.


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Affected Products

Dell 16 DC16251, Dell Dock WD19, Dell Dock – WD19S
Article Properties
Article Number: 000315992
Article Type: Solution
Last Modified: 21 May 2025
Version:  1
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