Latitude 7480/7280 and WD15 no preboot keyboard

Question

Hi.I'm new to this forum, so please forgive me if this question has already been asked. I have a problem with the WD15 dock together with the Latitude 7280/7480 series. The problem is that a keyboard connected to the dock does not work in pre-boot.So I won't be able to for example enter 'bios' with help of the external keyboard, and even worse (for the users in my orginazation anyways) enter the Bitlocker PIN with the external keyboard. My bios version is 1.0.8. I have tried both the USB 2.0 and the 3.0 ports on the dock.I have tried disabling Fast Boot in bios.Tried disabling Thunderbolt (since the keyboard is working on a 5480 laptop, I figured that this might be the problem).I have also tried enabling Thunderbolt Pre-boot modules, and Thunderbolt adapter boot support in bios.None of this actually helped. If I connect the keyboard directly on the laptop it's working. Hopefully someone here has some kind of idea what might be the problem.According to Dell support the keyboard should work in pre-boot when connected to the WD15 dock. RegardsBjörn

alayac · Accepted Answer

I have both models (Latitude 7280, Latitude 7480) here with a WD15 dock and they both function normally in pre-boot over a WD15 dock. The dock I use is updated with the latest firmware (1.0.0.8).

The Latitude 7280 has BIOS version 1.2.9 and the Latitude 7480 has BIOS version 1.2.9.

Of note, I also have the following BIOS settings configured:

System Configuration - USB Configuration - Enable USB Boot Support

System Configuration - USB Configuration - Enable External USB Port

System Configuration - Thunderbolt Adapter Configuration - Enable Thunderbolt Adapter Support

System Configuration - Thunderbolt Adapter Configuration - Enable Thunderbolt Adapter Pre-boot Modules

System Configuration - Thunderbolt Adapter Configuration - Enable Thunderbolt Adapter Boot Support

Post Behavior - Fastboot - Thurough

seaho · Answer

I've the same issue with 7280/7480 WD15 don't works and the PC can not find the USB when it connects to the USB at WD15. I've have try to upgrade all fireware without success

fayejas · Answer

Doesn't look like this discussion is getting any attention from Dell.  This is a real issue.

fayejas · Answer

I'll see how that works in our environment.  Thanks

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