Since it took me quite some time to figure out how to get Xtion (Primesense) to work on VMware I thought to share it here with you. (with Kinect I have a problem to let ROS
Got the same warning from opennni (issued at start by a binary located at Tools/PSLinkConsole) with another sensor.
Solved by starting process as sudo - my guess: to set priority to USB event threads you need root access. :)