OpenNI USB thread priority warning

Problem

I have a Primesense camera plugged into USB port. Running any program linked with the OpenNI library throws this warning:

Warning: USB events thread - failed to set priority. This might cause loss of data

Solution

OpenNI tries to set the USB async thread priority to critical. This works on Linux only with root privileges. For a normal user, the program will throw this warning. To get rid of this warning, run the program as root.

For more details see ThirdParty/PSCommon/XnLib/Source/Linux/XnLinuxUSB.cpp in OpenNI source code here.

Tried with: Primesense RD1.09, OpenNI 2.2 and Ubuntu 14.04

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