Re: [pwc] Greyscreen with Logitech Quickcam Pro 4000

[Doctorcam <>]

* Christoph Anton Mitterer  wrote the following:
> Hi.
> 
> I'm using the most recent kernel (2.6.14.5 or so) with debian sid.
> 
> As driver for the webcam, I'm using the stuff that is already contained
> in the kernel.... (in the USB section).
> 
> But all applications just give me a grey screen. I've tested it with the
> unstable debian versions of gnomemeeting, camorama and xawtv.
> 
> Any idea?

I have the same problem with 2.6.12.5, and have tried various things to
get it going, with no success.

Using v4l-info, I get the following:

### video4linux device info [/dev/video0] ###
general info
    VIDIOCGCAP
        name                    : "Logitech QuickCam Pro 4000"
        type                    : 0x1 [CAPTURE]
        channels                : 1
        audios                  : 1
        maxwidth                : 640
        maxheight               : 480
        minwidth                : 160
        minheight               : 120

channels
    VIDIOCGCHAN(0)
        channel                 : 0
        name                    : "Webcam"
        tuners                  : 0
        flags                   : 0x0 []
        type                    : CAMERA
        norm                    : 0

tuner
ioctl VIDIOCGTUNER: Invalid argument

audio
    VIDIOCGAUDIO
        audio                   : -1
        volume                  : 0
        bass                    : 0
        treble                  : 0

picture
    VIDIOCGPICT
        brightness              : 39424
        hue                     : 65535
        colour                  : 34730
        contrast                : 33792
        whiteness               : 55296
        depth                   : 24
        palette                 : YUV420P

buffer
    VIDIOCGFBUF
        base                    : (nil)
        height                  : 0
        width                   : 0
        depth                   : 0
        bytesperline            : 0

window
    VIDIOCGWIN
        x                       : 0
        y                       : 0
        width                   : 176
        height                  : 144
        chromakey               : 0
        flags                   : 655360

I'm far from being expert with all this, and do not know the
significance of the values, though it is clear that the camera is
recognized correctly.  However, the "invalid argument" for
VIDIOCGTUNER may mean something.

As an aside, I note that the sound has never worked, even with other
kernels when the video was working.

Cheers

Cam

-- 
Cam Ellison  Ph.D.  R.Psych. #01417

Cam Ellison & Associates Ltd.
Management Psychology

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Roberts Creek  BC  V0N 2W2

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