How to recognize a usb webcam?? - Setup

This is a discussion on How to recognize a usb webcam?? - Setup ; Dear all, I'm in the process of installing a philips spc1300nc webcam on a debian-lenny distro (2.6.24-1-686) via uvcvideo. All went well, lsusb gave my cam, luvcview -f jpg gave unstable images, well things on their way -- Then I ...

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Thread: How to recognize a usb webcam??

  1. How to recognize a usb webcam??

    Dear all,

    I'm in the process of installing a philips spc1300nc webcam
    on a debian-lenny distro (2.6.24-1-686) via uvcvideo.
    All went well, lsusb gave my cam, luvcview -f jpg gave unstable
    images, well things on their way --

    Then I went to amsn, installed latest verion via svn, a three
    dozen packages (well I couldn't find gstreamer and farsight
    -- synaptic says he loads them, but when compiling amsn,
    an error occurs because these packages are missing --
    I couldn't find gst-register or gstreamer-register ???)

    Anyway, the big bad surprise:
    *my webcam is not recognised anymore* ???

    Extract of /var/log/syslog :
    ------------------------------------------------
    kernel: Linux video capture interface: v2.00
    kernel: usbcore: registered new interface driver uvcvideo
    kernel: USB Video Class driver (v0.1.0)
    kernel: usb 5-1: new high speed USB device using ehci_hcd and address 7
    kernel: usb 5-1: device descriptor read/64, error -71
    kernel: usb 5-1: device descriptor read/64, error -71
    kernel: usb 5-1: new high speed USB device using ehci_hcd and address 8
    kernel: usb 5-1: device descriptor read/64, error -71
    kernel: usb 5-1: device descriptor read/64, error -71
    kernel: usb 5-1: new high speed USB device using ehci_hcd and address 9
    kernel: usb 5-1: device not accepting address 9, error -71
    kernel: usb 5-1: new high speed USB device using ehci_hcd and address 10
    kernel: usb 5-1: device not accepting address 10, error -71

    kernel: usbcore: deregistering interface driver uvcvideo

    kernel: usbcore: registered new interface driver uvcvideo
    kernel: USB Video Class driver (v0.1.0)
    kernel: usb 5-1: new high speed USB device using ehci_hcd and address 11
    kernel: usb 5-1: device descriptor read/64, error -71
    kernel: usb 5-1: device descriptor read/64, error -71
    .....
    ------------------------------------------------
    I had before a couple of
    ----------------------------------------------------------------
    kernel: uvcvideo: Failed to query (1) UVC control 2 (unit 0) : -32 (exp.
    26).
    kernel: uvcvideo: usb_control_msg was delayed
    kernel: uvcvideo: Failed to query (135) UVC control 2 (unit 3) : -110
    (exp. 2).
    kernel: uvcvideo: usb_control_msg was delayed
    -------------------------------------------------------------------------
    and even before :
    ------------------------------------------------------------------------
    kernel: uvcvideo: Found UVC 1.00 device Philips SPC 1300NC Webcam
    (0471:0331)
    kernel: uvcvideo: Failed to query (1) UVC control 2 (unit 0) : -32 (exp.
    26).
    kernel: uvcvideo: usb_control_msg was delayed
    kernel: uvcvideo: Failed to initialize the device, (-5). trying to reset ...
    NetworkManager: [1209837286.545524] nm_hal_device_added(): New
    device added (hal udi is
    '/org/freedesktop/Hal/devices/usb_device_471_331_noserial_0').
    NetworkManager: [1209837286.620082] nm_hal_device_added(): New
    device added (hal udi is
    '/org/freedesktop/Hal/devices/usb_device_ffffffff_ffffffff_noserial').
    kernel: usb 5-1: reset high speed USB device using ehci_hcd and address 6
    kernel: usb 5-1: device descriptor read/64, error -71
    kernel: usb 5-1: device descriptor read/64, error -71
    kernel: usb 5-1: reset high speed USB device using ehci_hcd and address 6
    kernel: usb 5-1: device descriptor read/64, error -71
    kernel: usb 5-1: device descriptor read/64, error -71
    kernel: usb 5-1: reset high speed USB device using ehci_hcd and address 6
    kernel: usb 5-1: device not accepting address 6, error -71
    kernel: usb 5-1: reset high speed USB device using ehci_hcd and address 6
    kernel: usb 5-1: device not accepting address 6, error -71
    ----------------------------------------------------------------

    I tried several combinations of plugging/unplugging the cam/module

    As you can guess, help would be appreciated :-p
    Best,
    Amities,
    Olivier

  2. Re: How to recognize a usb webcam??

    easy enough:

    rmmod ehci_hcd
    modprobe ehci_hcd

    as root :-)
    Best,
    A.O.

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