I flashed the image and USB worked 0 times out of 4 reboots.
I still get the following in dmesg:
[ 26.046829] xhci-hcd xhci-hcd.0.auto: Error while assigning device slot ID: Command Aborted
[ 26.046862] xhci-hcd xhci-hcd.0.auto: Max number of devices this xHCI host supports is 127.
[ 26.046893] usb usb1-port1: couldn't allocate usb_device
[ 38.334814] xhci-hcd xhci-hcd.0.auto: Error while assigning device slot ID: Command Aborted
[ 38.334843] xhci-hcd xhci-hcd.0.auto: Max number of devices this xHCI host supports is 127.
[ 38.334870] usb usb2-port1: couldn't allocate usb_device
Rebooting (by typing reboot in a terminal) doesn’t work for me, either. The display never comes on after a reboot. The NIC lights show some activity from time to time, but no IP address is assigned.