Re: [linux-uvc-devel] uvcvideo: Failed to query (129)

[Bernard D. <ber...@fr...>]

Hi,

I did not get any response. 

Is my case hopeless? 

Thanks

Best regards
Bernard Dano.

----- Mail original -----
De: "Bernard Dano" <ber...@fr...>
À: lin...@li...
Envoyé: Dimanche 1 Mars 2015 16:12:11
Objet: uvcvideo: Failed to query (129)

Hi,

I've got a problem with my webcam. It used to work and does not anymore. I cannot say if it has worked with my present ubuntu or only before my last upgrade.
I cannot say if my webcam is dead or if it's a linux issue. Bus as far as some commands seems to recognize the webcam, I suspect (and hope) it works... 

I've found uvcvideo FAQ with the same subject, but no solution. 

I have:
[ 8615.467941] Linux video capture interface: v2.00
[ 8615.481217] uvcvideo: Found UVC 1.00 device HP Webcam-101 (0408:0f41)
[ 8615.481222] uvcvideo: Forcing device quirks to 0x100 by module parameter for testing purpose.
[ 8615.481223] uvcvideo: Please report required quirks to the linux-uvc-devel mailing list.
[ 8615.482002] uvcvideo: Failed to query (129) UVC probe control : -32 (exp. 26).
[ 8615.482009] uvcvideo: Failed to initialize the device (-5).
[ 8615.482077] usbcore: registered new interface driver uvcvideo
[ 8615.482080] USB Video Class driver (1.1.1)

(Note I have a failure also when emptying /etc/modprobe.d/uvcvideo.conf)


I'm presently working with
Ubuntu 14.04 LTS
Pentium(R) Dual-Core CPU T4300 @ 2.10GHz × 2, 64 bits.


My device is a UVC device (http://www.ideasonboard.org/uvc/faq/#faq1):
~ $ lsusb -d 0408:0f41 -v | grep "14 Video"
      bFunctionClass         14 Video
      bInterfaceClass        14 Video
      bInterfaceClass        14 Video
      bInterfaceClass        14 Video
      bInterfaceClass        14 Video
      bInterfaceClass        14 Video
      bInterfaceClass        14 Video
      bInterfaceClass        14 Video
      bInterfaceClass        14 Video
~ $ lsusb
Bus 006 Device 002: ID 0408:0f41 Quanta Computer, Inc. 

According to usb-devices it is HP Webcam-101 (by Quanta Computer, Inc)
P:  Vendor=0408 ProdID=0f41 Rev=01.03  
S:  Manufacturer=SN001
S:  Product=HP Webcam-101

However, the vendor / product IDs don't match supported devices http://www.ideasonboard.org/uvc/ where I can find:
058f:a001    HP Webcam-101 (HP Pavilion g6 notebooks)       Alcor Micro
but as I don't have a HP Pavillon g6 notebooks, but a Compaq, maybe the IDs are different (strange)?

Following http://www.ideasonboard.org/uvc/faq/#faq2 I've done: 
1. OK (UVC device)

2. Enable all uvcvideo module traces
~ $ sudo chmod a+w /sys/module/uvcvideo/parameters/trace (otherwise I cannot change it)
~ $ sudo echo 0xffff > /sys/module/uvcvideo/parameters/trace
~ $ cat /sys/module/uvcvideo/parameters/trace
65535

~ $ dmesg > ~/dmesg.log
3. Reproduce the problem
~ $ gstreamer-properties
(gstreamer-properties:7730): Gtk-WARNING **: Unknown property: GtkDialog.has-separator
gstreamer-properties-Message: Skipping unavailable plugin 'artsdsink'
gstreamer-properties-Message: Skipping unavailable plugin 'esdsink'
gstreamer-properties-Message: Skipping unavailable plugin 'sunaudiosink'
gstreamer-properties-Message: Skipping unavailable plugin 'glimagesink'
gstreamer-properties-Message: Skipping unavailable plugin 'sdlvideosink'
gstreamer-properties-Message: Skipping unavailable plugin 'v4lmjpegsrc'
gstreamer-properties-Message: Skipping unavailable plugin 'qcamsrc'
gstreamer-properties-Message: Skipping unavailable plugin 'v4lsrc'
gstreamer-properties-Message: Skipping unavailable plugin 'esdmon'
gstreamer-properties-Message: Skipping unavailable plugin 'sunaudiosrc'
gstreamer-properties-Message: Error running pipeline 'Video for Linux 2 (v4l2)': Impossible d'identifier le périphérique « /dev/video0 ». [v4l2_calls.c(497): gst_v4l2_open (): /GstPipeline:pipeline0/GstV4l2Src:v4l2src1:
system error: Aucun fichier ou dossier de ce type]
~ $ dmesg > ~/dmesg.log

### no change in dmesg, the driver does not print any debugging messages to the kernel log.

Note before this trial I've had many changes in dmesg during many trials:  
~ $ sudo modprobe -r uvcvideo
~ $ sudo modprobe uvcvideo 

3. Reproduce the problem
To have traces in uvcvideo I've done 
~ $ sudo modprobe -r uvcvideo
~ $ sudo modprobe uvcvideo trace=0xFFFF

4. Capture the contents of the kernel log:
I add additional traces (attached file)
~ $ dmesg > ~/dmesg.log

5. If your device is not listed in the supported devices list, dump its USB descriptors
(please see also earlier in my email about supported devices) 
~ $ lsusb -d 0408:0f41 -v > lsusb.log


I also join 
~ $ modinfo uvcvideo > mod_uvcvideo.log


Thanks in advance.


Best regards,

Bernard Dano.