Flashing/dropping Dell 4K monitors attached to Dock with HDMI

I have 3 Dell S3221QS monitors utilizing Plugable UD-6950Z (2 attached to Dock/HDMI, 1 attached directly/HDMI) to extend displays for HP Elitebook G8 laptop. The 2 monitors attached to the Plugable Dock continue to experience screen flicker, anywhere from an annoying flicker up to 10 second blank screen, as well as many times dropping outright where monitors are not even detectable in Windows 10 display settings.


Thank you for contacting Plugable! I am sorry to hear that your UD-6950Z docking station is not functioning as expected, and would be happy to provide additional support.

To help diagnose the issue, may I ask you to please keep the device connected to your laptop and everything still attached (even if not working as expected) and send us the output of our diagnostic utility PlugDebug? → https://plugable.com/pages/plugdebug

Once you have the logs, simply send an email to support@plugable.com with the subject line of “Ticket 374676” so that we can prioritize that case and match it to this inquiry.

If you could provide your Amazon Order ID (or other proof of purchase) associated with your Plugable device, I would be happy to check on your warranty status as well.

Thank you for giving us the chance to help!

Plugable Technologies

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