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June 22nd, 2024 04:35
WD22TB4 Thunderbolt Dock - cannot use HDMI and USB-C DP simultaneously?
Dell Thunderbolt Dock – WD22TB4
I've been trying all evening to get this docking station to work with the USB-C DisplayPort and the HDMI port at the same time. Both work independently no problem (one at a time) but if you plug in both together, one of the displays goes black - it's like they're sharing the same connection.
Can someone confirm if this is impossible to do? It seems like a very, very strange limitation!
Thanks.
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Chino de Oro
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June 22nd, 2024 04:55
The HDMI and MFDP USB Type-C ports on the back of the WD22TB4 are muxed. Therefore, only one of these two ports can be used at a time. If the HDMI port is in use, the USB Type-C port will still retain USB functionality.
See this user guide for video connectors for multi display setup and supported configurations.
(edited)
Fats2576
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September 4th, 2024 11:06
Thanks for this info Chino. I wish that had been clearly defined before I ordered the Thunderbolt dock, as I need the HDMI and USB-C Thunderbolt connections to work together.
Fortunately found this before I had tried to troubleshoot further.
ewyngaarde
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October 5th, 2024 08:11
Having a similar issue trying to use back HDMI and front USB-C port for video. Is there a solution for this?
Chino de Oro
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October 6th, 2024 00:51
@ewyngaarde , if applicable, daisy chaining your monitors.