Bug 969618

Description of problem:

Intermittently, an OmniVision monitor webcam on a Dell monitor fails to initialize. Unscientifically, it seems to successfully initialize about 1/4 of the time and fail otherwise.

Having not used the camera in a few months, I cannot identify when the issue began (log rotation has eliminated when it had worked reliably). To the best of my knowledge, it did work reliably up to at least two months ago on Fedora 18 and several previous Fedora releases.

The device is detected in every instance, but often fails to initialize with:

   uvcvideo: Failed to query (129) UVC probe control : -32 (exp. 26). 

dmesg output for both a working and failed scenario are below.


Version-Release number of selected component (if applicable):
Kernel 3.9.4-200.fc18.x86_64

How reproducible:
Intermittent - webcam is successfully initialized approximately 1/4 of the time.

Steps to Reproduce:
1. Plug in or boot with an attached OmniVision monitor webcam
2. Check dmesg output or attempt to use a video application such as Cheese or Camorama
3.

Actual results:
Video device fails to initialize and is not available for use at /dev/videoX

Expected results:
Video device should initialize and register as /dev/videoX

Additional info:

A similar recent bug report in Ubuntu:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1168430



/var/log/messages from a *failed* initialization:
--------------------------
$ sudo egrep -i  '(video|cam)' /var/log/messages
May 29 20:51:22 galactic-ac kernel: [    3.399405] usb 1-3.1: Product: Monitor Webcam
May 29 20:51:22 galactic-ac kernel: [    3.747422] Linux video capture interface: v2.00
May 29 20:51:22 galactic-ac kernel: [    3.779896] uvcvideo: Found UVC 1.00 device Monitor Webcam (05a9:2649)
May 29 20:51:22 galactic-ac kernel: [    3.780667] uvcvideo: UVC non compliance - GET_DEF(PROBE) not supported. Enabling workaround.
May 29 20:51:22 galactic-ac kernel: [    3.780973] uvcvideo: Failed to query (129) UVC probe control : -32 (exp. 26).
May 29 20:51:22 galactic-ac kernel: [    3.780983] uvcvideo: Failed to initialize the device (-5).
May 29 20:51:22 galactic-ac kernel: [    3.781178] usbcore: registered new interface driver uvcvideo
May 29 20:51:22 galactic-ac kernel: [    3.781181] USB Video Class driver (1.1.1)


dmesg output fomr a *successful* initialization:
------------------------------
$ dmesg |egrep -i '(video|cam)'
[    1.311725] pci 0000:01:05.0: Boot video device
[    3.399890] usb 1-3.1: Product: Monitor Webcam
[    3.786399] Linux video capture interface: v2.00
[    3.797820] uvcvideo: Found UVC 1.00 device Monitor Webcam (05a9:2649)
[    3.801544] uvcvideo: UVC non compliance - GET_DEF(PROBE) not supported. Enabling workaround.
[    3.803257] input: Monitor Webcam as /devices/pci0000:00/0000:00:12.2/usb1/1-3/1-3.1/1-3.1:1.0/input/input7
[    3.803432] usbcore: registered new interface driver uvcvideo
[    3.803437] USB Video Class driver (1.1.1)