title: libv4l2: error turning on stream: No space left on device
body: <p>I try to get stereo pair for opencv. I connect Logitech B910 and Logitech C910 webcams to usb. But have this error. I played with quirks parametrs and set <code>outfmt=mjpeg</code> in mplayer, but have this error again.</p>
  
  <p>Where can I find bug in uvcvideo or usb drivers? What monitoring or debuging tools I should use?</p>