I managed to get the USB devices working, by entering the BIOS menu, and disabling the thunderbolt security. Now all the devices work; however... my bluetooth mouse (MX Master 3) becomes unbearably laggy when the dock is connected to the thunderbolt port. When connected to the normal USB port, this behavior does not occur. Update=Resolved-The problem hasn't occurred anymore since my last message. I don't know... the laptop and docking station were pretty new, maybe some things were still getting setup in the background or something... 
Hi all,  I have a Dell XPS 13 9370 with a Dell WD19TBS thunderbolt docking station. If I understand correctly, the ports on the left of the laptop (with the little lightning bolt next to them) are thunderbolt ports; the one on the right is a USB-C + displayport.  When I plug my docking station into the thunderbolt ports, the screen works, but the charger gives a little exclamation mark, and it does not recognize any of my peripherals connected to the dock.  When I connect it to the USB-C + displayport one, it works, but gives me a warning saying performance might be affected.  I'm thinking the thunderbolt ports are not working properly.  When I open the device manager, I see 3 devices with a yellow exclamation mark:  - PCI Data Acquisition and Signal Processing Controller  - PCI Memory controller  - SM Bus Controller  Anyone has any idea what I can do? 
Thunderbolt ports on Dell XPS 13 9370 do not work with Dell WD19TBS docking 
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