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[Gary B <1169720@xxxxxxxxxxxxxxxxxx>]

I'm not sure if this is the same bug, but the information may be useful.
For me the camera and audio work, but if my machine is left to sleep for
a 'while' (longer than a few minutes?) it seems to disappear - Cheese
and Google Hangouts can't find it  (can't find audio or video).  Logging
out does not fix the problem but rebooting does.  I forgot to see if it
was still in the output from lsusb before I rebooted.  Looking back at
various syslogs, I found the following - the first line occurs 6 times.

Sep 25 21:45:35 my_machine pulseaudio[30194]: [pulseaudio] module.c: Failed to load module "module-alsa-card" (argument: "device_id="2" name="usb-046d_HD_Pro_Webcam_C920_B8C21EAF-02-C920" card_name="alsa_card.usb-046d_HD_Pro_Webcam_C920_B8C21EAF-02-C920" namereg_fail=false tsched=yes fixed_latency_range=no ignore_dB=no deferred_volume=yes use_ucm=no card_properties="module-udev-detect.discovered=1""): initialization failed.
Sep 25 21:45:35 my_machine pulseaudio[30194]: [pulseaudio] module-udev-detect.c: Tried to configure /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.5/2-1.5:1.2/sound/card2 (alsa_card.usb-046d_HD_Pro_Webcam_C920_B8C21EAF-02-C920) more often than 5 times in 10s
Sep 25 21:52:42 my_machine kernel: [    1.926142] usb 2-1.5: Product: HD Pro Webcam C920
Sep 25 21:52:44 my_machine kernel: [   24.106650] uvcvideo: Found UVC 1.00 device HD Pro Webcam C920 (046d:082d)
Sep 25 21:52:44 my_machine kernel: [   24.108392] input: HD Pro Webcam C920 as /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.5/2-1.5:1.0/input/input13
Sep 25 21:52:48 my_machine colord: Device added: sysfs-046d-HD_Pro_Webcam_C920
Sep 25 21:54:20 my_machine kernel: [    1.921948] usb 2-1.5: Product: HD Pro Webcam C920
Sep 25 21:54:20 my_machine kernel: [   24.370524] uvcvideo: Found UVC 1.00 device HD Pro Webcam C920 (046d:082d)
Sep 25 21:54:20 my_machine kernel: [   24.371163] input: HD Pro Webcam C920 as /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.5/2-1.5:1.0/input/input13
Sep 25 21:54:23 my_machine colord: Device added: sysfs-046d-HD_Pro_Webcam_C920


I am running Ubuntu 13.04, uname -a says '3.8.0-19-generic #30-Ubuntu SMP Wed May 1 16:35:23 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux'

What may be more useful for this bug is the relevant lines from dmesg
after the reboot:

[    1.831488] usb 2-1.5: new high-speed USB device number 5 using ehci-pci
[    1.926108] usb 2-1.5: New USB device found, idVendor=046d, idProduct=082d
[    1.926114] usb 2-1.5: New USB device strings: Mfr=0, Product=2, SerialNumber=1
[    1.926119] usb 2-1.5: Product: HD Pro Webcam C920
[    1.926122] usb 2-1.5: SerialNumber: B8C21EAF
....
[   23.640163] Linux video capture interface: v2.00
[   23.813615] uvcvideo: Found UVC 1.00 device HD Pro Webcam C920 (046d:082d)
[   23.813639] usbcore: registered new interface driver snd-usb-audio
[   23.814750] input: HD Pro Webcam C920 as /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.5/2-1.5:1.0/input/input14
[   23.814863] usbcore: registered new interface driver uvcvideo
[   23.814865] USB Video Class driver (1.1.1)

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https://bugs.launchpad.net/bugs/1169720

Title:
  Not work Logitech HD Pro Webcam C920

Status in The Linux Kernel:
  Confirmed
Status in “linux” package in Ubuntu:
  Incomplete

Bug description:
  Attach dmesg

  ProblemType: Bug
  DistroRelease: Ubuntu 13.04
  Package: linux-image-3.8.0-18-generic 3.8.0-18.28
  ProcVersionSignature: Ubuntu 3.8.0-18.28-generic 3.8.6
  Uname: Linux 3.8.0-18-generic x86_64
  NonfreeKernelModules: wl
  ApportVersion: 2.9.2-0ubuntu8
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC1:  caravena   2196 F.... pulseaudio
   /dev/snd/controlC0:  caravena   2196 F.... pulseaudio
  Date: Tue Apr 16 17:34:27 2013
  HibernationDevice: RESUME=UUID=935761c6-0879-49ed-b5a5-c5218c97b843
  InstallationDate: Installed on 2013-02-06 (69 days ago)
  InstallationMedia: Ubuntu 13.04 "Raring Ringtail" - Alpha amd64 (20121126)
  Lsusb:
   Bus 001 Device 005: ID 046d:082d Logitech, Inc. 
   Bus 001 Device 002: ID 046d:0896 Logitech, Inc. OrbiCam
   Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
   Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
   Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
  MachineType: Acer, inc. Ferrari 1000
  MarkForUpload: True
  PccardctlIdent:
   Socket 0:
     no product info available
  PccardctlStatus:
   Socket 0:
     no card
  ProcFB: 0 radeondrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.8.0-18-generic root=UUID=d1524094-f99b-4050-8e1b-40b1526ca8f7 ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.8.0-18-generic N/A
   linux-backports-modules-3.8.0-18-generic  N/A
   linux-firmware                            1.105
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 09/11/07
  dmi.bios.vendor: Acer
  dmi.bios.version: v1.3204
  dmi.board.name: Ferrari6
  dmi.board.vendor: Acer, Inc.
  dmi.board.version: Not Applicable
  dmi.chassis.type: 1
  dmi.chassis.vendor: Acer, Inc.
  dmi.chassis.version: N/A
  dmi.modalias: dmi:bvnAcer:bvrv1.3204:bd09/11/07:svnAcer,inc.:pnFerrari1000:pvrNotApplicable:rvnAcer,Inc.:rnFerrari6:rvrNotApplicable:cvnAcer,Inc.:ct1:cvrN/A:
  dmi.product.name: Ferrari 1000
  dmi.product.version: Not Applicable
  dmi.sys.vendor: Acer, inc.

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