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[Anton Hughes <kurrent93@xxxxxxxxx>]

Hi, I also have this problem.

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https://bugs.launchpad.net/bugs/1422680

Title:
  v4l2 regression: T420s built in camera stopped working

Status in linux package in Ubuntu:
  Expired

Bug description:
  The  Chicony Electronics Camera (as built into for example Lenovo
  T420s) stopped working somewhere between kernel 3.2 and 3.13.

  I use both kernels in Ubuntu 12.04, and the camera works with the
  older one, so I filed the bug here as I don't know when it stopped
  working.

  The camera is still recognized by v4l2, properties can be accessed by
  v4l2-ctl for example, and seemed correctly reported back (pixelformats
  for exmaple match my expectation).  But the frame capturing intself
  will always fail with 'device busy'.

  Usb IDs:
  04f2:b221 Chicony Electronics Co., Ltd integrated camera

  
  What further information would be useful?

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