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Thread: Dell L502x, Quanta webcam problem

  1. #1
    Join Date
    May 2013
    Beans
    3

    Dell L502x, Quanta webcam problem

    I have a problem with my webcam from my laptop on ubuntu 12.04
    Dell XPS 15 L502x, Webcam : Quanta computers

    The problems:
    1. Periodically the image freezes in skype call
    2. After some time although the webcam start ( light next to lens ) I get only a
    black image. The problem starts with skype and then all other programs have problems
    ( guvcview, cheese ) and have a black image

    I have to restart my laptop to windows to get it working, or turn off the laptop for some time.
    This problems never appears when I am using the webcam in windows.
    And it more frequent now. No process ( lsof /dev/video0 ) appears to be using the webcam.

    And with guvcview i get:
    Could not grab image (select timeout): Resource temporarily unavailable

    I even tried reloading the module with no luck:
    modprobe -r uvcvideo
    modprobe uvcvideo

    It might seem a hardware error and not software error, as sometimes by moving my laptop
    screen back and forth it unfreezes the image. But these problems never occur in windows.

    Any ideas?
    It is really frustrating having to restart all the time.Any help is appreciated.
    Last edited by thanasvel; August 12th, 2013 at 01:08 AM.

  2. #2
    Join Date
    May 2013
    Beans
    3

    Re: Dell L502x, Quanta webcam problem

    I found a kind of weird solution ...
    I put a white object in front of the lens and the image appears.
    Probably some saturation or some max value makes the driver
    unfreeze.

    I 'll try to install the latest driver for the uvcvideo.
    (Which is hard as I have to recompile the kernel)

  3. #3
    Join Date
    May 2013
    Beans
    3

    Re: Dell L502x, Quanta webcam problem

    Add this repository and update
    https://launchpad.net/~pj-assis/+archive/testing

    That might be a solution
    Last edited by thanasvel; August 12th, 2013 at 01:09 AM.

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