Dell ThinOS 2402 Administrator’s Guide

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Docking Stations

The following docks and computers are supported:

Dell Dock - WD19/WD19S/WD19TB(Thunderbolt port is not supported)

Table 1. Platforms that support WD19 and their maximum resolutionPlatforms that support WD19 and their maximum resolution.
System	Maximum resolution for one monitor	Maximum resolution for two monitors	Maximum resolution for three monitors
Wyse 5470	4K 30 Hz	2 x (1920 x 1080)	Not Applicable
Latitude 3420	4K 30 Hz	2 x (2560 x 1440)	3 x (1920 x 1080)
Latitude 3440	4K 30 Hz	2 x (2560 x 1440)	3 x (1920 x 1080)

Dell Thunderbolt Dock - WD22TB4

Table 2. Platforms that support WD22TB4 and their maximum resolutionPlatforms that support WD22TB4 and their maximum resolution.
System	Maximum resolution for one monitor	Maximum resolution for two monitors	Maximum resolution for three monitors
Latitude 5440/5450	4K 60 Hz	4K + (2560 x 1440)	3 x (2560 x 1440)

Limitations
- If multiple monitors are connected, display audio does not work.
- Do not hot-plug monitors to the docking station as this causes a black screen issue. You can hot-plug the docking station instead.
- HDMI port and Type-C port cannot support two monitors simultaneously. Only one of these ports can be used as a display device at a time.
- If you connect two or three monitors to the docking station and plug out the docking station, ThinOS stops responding for 15 s or 30 s. When ThinOS stops responding, do not plug in the docking station again. Wait for ThinOS to recover and then plug in the docking station.
- If the default resolution of the monitors on the docking station is larger than the maximum supported resolution, the ThinOS client stops responding. For example, if you connect three monitors with default resolution of 4 K with a WD19S dock and then connect the dock to Latitude 3440, the client stops responding.
- ThinOS only supports one external network port. If there is a network port on the monitor and you connect the monitor to a docking station with type-C cable, the network port on the monitor works. But, the network port on the dock does not work.