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I have the same problem under fuerte/12.04. I also get the boost assert (also mentioned in http://answers.ros.org/question/11925/ros-kinect-roslaunch-openni_launch-opennilaunch/). Before this assert, I get one threading-related python exception per process:

Exception AttributeError: AttributeError("'_DummyThread' object has no attribute '_Thread__block'",) in <module 'threading' from '/usr/lib/python2.7/threading.pyc'> ignored

I have the same problem under fuerte/12.04. I also get the boost assert (also mentioned in http://answers.ros.org/question/11925/ros-kinect-roslaunch-openni_launch-opennilaunch/). Before this assert, I get one threading-related python exception per process:

Exception AttributeError: AttributeError("'_DummyThread' object has no attribute '_Thread__block'",) in <module 'threading' from '/usr/lib/python2.7/threading.pyc'> ignored

The problem seems to be a conflict with the Linux driver. Removing it with

sudo modprobe -r gspca_kinect

and

sudo modprobe -r gspca_main

solves the problem.