I have installed the freenect library from openkinect.org. With that library there is a demo application which you can run from the terminal to test out the Kinect. However when I run this command I get the following output:

richard@behemoth:~$ sudo freenect-glview 
Kinect camera test
Number of devices found: 1
Could not claim interface on camera: -6
Could not open device

This particular error is thrown by the library libusb by the function libusb_claim_interface and the error -6 corresponds to the LIBUSB_ERROR_BUSY. So my guess is that it has something to do with mounting the usb, rather than specifically the freenect library or the Kinect itself.

So my question is how can I find out what resource is using this interface and how can I free it so that I can access it?

Edit:

What I have tried so far (just to be sure):

• Rebooted
• Plugged-out, plugged-in
• Tried different usb ports
• Restarted udev

Additional information that might be useful:

/etc/fstab:

# /etc/fstab: static file system information.
#
# Use 'blkid -o value -s UUID' to print the universally unique identifier
# for a device; this may be used with UUID= as a more robust way to name
# devices that works even if disks are added and removed. See fstab(5).
#
# <file system> <mount point>   <type>  <options>       <dump>  <pass>
proc            /proc           proc    nodev,noexec,nosuid 0       0
# / was on /dev/sda1 during installation
UUID=1c73f217-ac8d-451b-8390-7a680628a856 /               ext4    errors=remount-ro 0       1
# swap was on /dev/sda5 during installation
UUID=bb49bd29-07ec-45a0-bbab-46fb8362b06b none            swap    sw              0       0

sudo uname -r:

Linux behemoth 3.0.0-14-generic-pae #23-Ubuntu SMP Mon Nov 21 22:07:10 UTC 2011 i686 i686 i386 GNU/Linux

cat /etc/lsb-release

DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=11.10
DISTRIB_CODENAME=oneiric
DISTRIB_DESCRIPTION="Ubuntu 11.10"