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Garbled characters on Monitor screen when resuming from sleep using the HDMI and Dell Docking Station TB16 / TB18DC / WD19TB / WD19DC / WD19TBS / WD19DCS

Summary: Monitor connected to HDMI port on Dell TB16 Dock experiences distortion after resuming from sleep.

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

On systems with KabyLake (KBL) processors, when you connect a Dell Docking Station TB16 / TB18DC / WD19TB / WD19DC / WD19TBS / WD19DCS to a monitor using the HDMI port, the monitor may display garbled characters randomly on the left of the Dell splash screen within 2 s when system resumes from an S4/S5 power state.

The issue is related to a Dynamic CD clock implementation change that causes the issue.

Cause

NA

Resolution

Workaround Solution

Workaround: You can work around the issue by unplugging then reconnecting either the TB16 / TB18DC / WD19TB / WD19DC / WD19TBS / WD19DCS USB Type-C connection to the system, or the HDMI monitor cable connection to the TB16 / TB18DC / WD19TB / WD19DC / WD19TBS / WD19DCS dock.

You can resolve this issue by updating the system BIOS to the most current version available from Dell Support/Drivers & Downloads. Make sure your system model and operating system are correct, choose BIOS from the Category drop-down menu, and download and install the latest available BIOS update that appears.

Affected Products

Dell Thunderbolt Dock TB16, Dell Performance Dock - WD19DC

Products

Dell Precision Dual USB-C Thunderbolt Dock - TB18DC, Dell Performance Dock – WD19DCS, Dell Thunderbolt Dock - WD19TB, Dell Thunderbolt Dock – WD19TBS
Article Properties
Article Number: 000133016
Article Type: Solution
Last Modified: 16 Feb 2024
Version:  6
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