so i have a dell server that is maxied out with 3 video cards.  I have added a pci USB card that allows me to pass through to one vm   The native vm of the dell server worked fine, but hot swapping usb wasn't going to work.   given that there was one last port on e the board pci x2, I decided to get a cable and break out for the port.  that let me add another usb controller.   everything was great.   Then the card disappeared.  I removed it and plugged it