Just installed a new Plugable UD-160-A. We’re using several of these throughout the office. On one in particular, the system slows to a crawl if the laptop lid is closed while the plugable device is attached; however, if we open the lid and set to “Show Desktop only on 2” (the external monitor), it runs fine. Close the lid again, everything slows to a crawl. I’m using the most recent audio/video/usb-to-network drivers. Any thoughts on what could be causing this?