U2518D, Fresco Logic USB cards, Windows 7 64 bit

Dell has never tested our monitors with the Fresco Logic USB cards. We test our monitors USB upstream cable connected directly to the computers USB port. The U2518D USB upstream port, USB upstream cable, and four USB downstream ports are all USB 3.0. So lets start by just troubleshooting just the U2518D and the computer.
* What specific computer model?
* What specific Fresco Logic USB cards?

My PC is a Dell XPS 9200 with 2 added USB 3.0 cards on the PCI bus.

These cards are Fresco Logic and on the  on the WHQL list.

Specificallyu, Fresco Logic xHCI (USB3) Root Hub 

Driver Provide Fresco Logic

Digital Signer: Microsoft Windows Hardware Compatibility Publisher.

They have worked flawlessly with 4 Western Digital Drivers, Samsung S8 Phone, Transcend High Speed Card Reader all USB 3.0. In fact, the card worked flawlessly with an earlier generation of this Dell monitor a U24?15, which I had to return to Amazon due to intermittent black vertical lines.

The monitor is connected to the card in the PC with the Dell Supplied Cable. As an aside I updated the monitor firmware over USB but now I just get a PADLOCK when trying to enter the menu system.

I hope you will not suggest the monitor hardware is not compatible with the WHQL hardware, just because Dell didnt test it. Both items have a USB Logo.

Again, test the U2518D USB upstream cable cable connected DIRECTLY to the Dimension 9200/XPS 410 rear USB ports. Then connect some devices to the U2518D USB downstream ports. Do those devices work, yes or no?

U2518D padlock =
Try these to unlock the Menu;
* Press the Menu button for 15 seconds (Result?)
* Press the Exit button for 15 seconds (Result?)
* Press both the Menu and Exit buttons for 15 seconds (Result?)

Thanks I cleared the padlock.

But why would I want to plug the USB 3.0 Monitor in a USB 2.0 port on the PC? Is this just a diagnostic step??

I purchased the monitor because I wanted a USB 3.0 Hub. I have USB 3.0 WHQL cards in my PC.

As I said, it works as a USB 2.0 Hub when the monitor is plugged into the USB Card in the computer. The reason that I say it works is that I updated the monitor firmware through the USB Card to the monitor.

To verify that the U2518D is fully functional, you need to test the U2518D on a current computer that has onboard USB 3.0 ports. If the U2518D USB hub functions at USB 3.0 speed, then the fault is not with the U2518D USB 3.0 cable or its USB 3.0 hub. The fault lies with either the 2006 XPS 410/Dimension 9200 computer using the Intel P965 Express chipset or the Fresco Logic USB 3.0 cards in the 12 year old computer. At that point, you would need to contact Fresco Logic Support. Explain in detail all of the hardware and ask for their thoughts.