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I got the same problem, here is how you fix it.

1- open up a new terminal and type roslaunch openni_launch openni.launch 2- after it launches, kill it by typing ctrl^c 3- in this terminal, type 'killall XnSensorServer(it might tell youno process is found) 4-in another terminal. launch theroslaunch turtlebot_bringup kinect.launch 5- If it still does not work, go back to step 1 and repeat. Sometimes it takes a few times.

Hope this fixes your problem. post back with the results.

regards.

Khalid

I got the same problem, here is how you fix it.

 1- open up a new terminal and type roslaunch roslaunch openni_launch openni.launch openni.launch
2- after it launches,  kill it by typing ctrl^c ctrl^c
3- in this terminal, type 'killall XnSensorServerkillall XnSensorServer (it might tell youno you no process is found)
found)
4-in another terminal. launch theroslaunch theroslaunch turtlebot_bringup kinect.launch
5- If it still does not work, go back to step 1 and repeat. Sometimes it takes a few times. times.
`

Hope this fixes your problem. post back with the results.

regards.

Khalid