Public bug reported:

When accessing the v4l video interface using the OpenCV  cvQueryFrame()
method, after an unpredictable amount of time, the bttv driver gives the
following error message:

VIDIOC_DQBUF error 5, Input/output error

See also
http://robolab.tek.sdu.dk/mediawiki/index.php/Using_OpenCV_on_live_video
for a full description of the symptom and their solution (downgrading to
kernel 2.6.18).

I'd like to keep my kernel version. Please update the bttv driver to fix
the bug that was introduced since the driver included with kernel image
2.6.18.

If you tell me how, I can go on and test patches/compile new modules.
This is somewhat urgent; I'd appreciate a timely feedback.

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: New

** Description changed:

- When accessing the v4l video interface using the OpenCV  cvQueryframe()
+ When accessing the v4l video interface using the OpenCV  cvQueryFrame()
  method, after an unpredictable amount of time, the bttv driver gives the
  following error message:
  
  VIDIOC_DQBUF error 5, Input/output error
  
  See also
  http://robolab.tek.sdu.dk/mediawiki/index.php/Using_OpenCV_on_live_video
  for a full description of the symptom and their solution (downgrading to
  kernel 2.6.18).
  
  I'd like to keep my kernel version. Please update the bttv driver to fix
  the bug that was introduced since the driver included with kernel image
  2.6.18.
  
  If you tell me how, I can go on and test patches/compile new modules.
  This is somewhat urgent; I'd appreciate a timely feedback.

-- 
bttv driver dies with VIDIOC_DQBUF error
https://bugs.launchpad.net/bugs/260251
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