I just started having this problem today. Updated to the latest firmware a few days back on this 150w Thunderbolt Dock P5Q58UT#ABA per the e-mail "Critical Driver Alert - Apr 12 2017 HP Thunderbolt 3 Dock Firmware (ver 1.12 Rev.A)". Today when plugging in my secondary display is corrupted. To note I have two of the same docks, one at home and one at work with different monitors in each location. I'm getting the same issue in both locations. I don't think two docks went bad and the thunderbolt ports appear to be functioning. Is there a way to rollback the firmware on these docks to see if that's the issue? If not what are the next steps to resolve, any advice? The normal troubleshooting steps on HP.com don't appear to address this. Pics attached.
After naviging through HPs cryptic support website I found one firmware that was out of date. After I updated the Thunderbolt 3 Dock firmware the monitor started working right for now. We will see... 🙂
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