just bought the UD-3900. VGA , Ethernet and Audio jacks work, but none of the USB ports work. Tried wireless mouse, wired USB Headset, and a USB memory stick. All of them work in the USB ports on the laptop.
also tried unplugging device power, rebooting PC, in various combinations
Thanks for getting in touch!
I should grab some system logs and see what could be going on. If yo(mailto:email@example.com) and mention ticket #173931 so we can take a look.