046d:082d [Asus P8Z68-V PRO] No sound from Logitech HD Pro Webcam C920

[Lastique]

I'm trying to use Logitech HD Pro Webcam C920 on Ubuntu 13.10, but not getting any sound from it. The camera is detected properly and displayed in Pulseaudio volume control, it's not muted but the audio level bar always stays at 0. I can see video from it in Skype or WebRTC apps in Chrome, but no audio. I can see no errors in dmesg or other logs.

Kernel version: Ubuntu 3.11.0-14.21-generic 3.11.7
pulseaudio version: 1:4.0-0ubuntu6
---
ApportVersion: 2.12.5-0ubuntu2.2
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: lastique 2393 F.... pulseaudio
 /dev/snd/controlC1: lastique 2393 F.... pulseaudio
 /dev/snd/pcmC1D0p: lastique 2393 F...m pulseaudio
 /dev/snd/controlC2: lastique 2393 F.... pulseaudio
DistroRelease: Ubuntu 13.10
InstallationDate: Installed on 2012-12-29 (363 days ago)
InstallationMedia: Kubuntu 12.10 "Quantal Quetzal" - Release amd64 (20121017.1)
IwConfig:
 eth0 no wireless extensions.

 lo no wireless extensions.

 virbr0 no wireless extensions.
MachineType: System manufacturer System Product Name
MarkForUpload: True
NonfreeKernelModules: nvidia
Package: linux (not installed)
ProcFB:

ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.11.0-14-generic root=UUID=9e81b2ba-5525-4d9d-b45c-48093a115d64 ro quiet splash nomodeset
ProcVersionSignature: Ubuntu 3.11.0-14.21-generic 3.11.7
RelatedPackageVersions:
 linux-restricted-modules-3.11.0-14-generic N/A
 linux-backports-modules-3.11.0-14-generic N/A
 linux-firmware 1.116
RfKill:
 0: hci0: Bluetooth
  Soft blocked: no
  Hard blocked: no
Tags: saucy
Uname: Linux 3.11.0-14-generic x86_64
UpgradeStatus: Upgraded to saucy on 2013-10-17 (71 days ago)
UserGroups: adm cdrom dip fuse libvirtd lpadmin plugdev sambashare sudo
dmi.bios.date: 11/09/2012
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 3603
dmi.board.asset.tag: To be filled by O.E.M.
dmi.board.name: P8Z68-V PRO
dmi.board.vendor: ASUSTeK Computer INC.
dmi.board.version: Rev 1.xx
dmi.chassis.asset.tag: Asset-1234567890
dmi.chassis.type: 3
dmi.chassis.vendor: Chassis Manufacture
dmi.chassis.version: Chassis Version
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr3603:bd11/09/2012:svnSystemmanufacturer:pnSystemProductName:pvrSystemVersion:rvnASUSTeKComputerINC.:rnP8Z68-VPRO:rvrRev1.xx:cvnChassisManufacture:ct3:cvrChassisVersion:
dmi.product.name: System Product Name
dmi.product.version: System Version
dmi.sys.vendor: System manufacturer
---
ApportVersion: 2.12.5-0ubuntu2.2
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: lastique 2393 F.... pulseaudio
 /dev/snd/controlC1: lastique 2393 F.... pulseaudio
 /dev/snd/pcmC1D0p: lastique 2393 F...m pulseaudio
 /dev/snd/controlC2: lastique 2393 F.... pulseaudio
DistroRelease: Ubuntu 13.10
InstallationDate: Installed on 2012-12-29 (363 days ago)
InstallationMedia: Kubuntu 12.10 "Quantal Quetzal" - Release amd64 (20121017.1)
IwConfig:
 eth0 no wireless extensions.

 lo no wireless extensions.

 virbr0 no wireless extensions.
MachineType: System manufacturer System Product Name
MarkForUpload: True
NonfreeKernelModules: nvidia
Package: linux (not installed)
ProcFB:

ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.11.0-14-generic root=UUID=9e81b2ba-5525-4d9d-b45c-48093a115d64 ro quiet splash nomodeset
ProcVersionSignature: Ubuntu 3.11.0-14.21-generic 3.11.7
RelatedPackageVersions:
 linux-restricted-modules-3.11.0-14-generic N/A
 linux-backports-modules-3.11.0-14-generic N/A
 linux-firmware 1.116
RfKill:
 0: hci0: Bluetooth
  Soft blocked: no
  Hard blocked: no
Tags: saucy
Uname: Linux 3.11.0-14-generic x86_64
UpgradeStatus: Upgraded to saucy on 2013-10-17 (71 days ago)
UserGroups: adm cdrom dip fuse libvirtd lpadmin plugdev sambashare sudo
dmi.bios.date: 11/09/2012
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 3603
dmi.board.asset.tag: To be filled by O.E.M.
dmi.board.name: P8Z68-V PRO
dmi.board.vendor: ASUSTeK Computer INC.
dmi.board.version: Rev 1.xx
dmi.chassis.asset.tag: Asset-1234567890
dmi.chassis.type: 3
dmi.chassis.vendor: Chassis Manufacture
dmi.chassis.version: Chassis Version
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr3603:bd11/09/2012:svnSystemmanufacturer:pnSystemProductName:pvrSystemVersion:rvnASUSTeKComputerINC.:rnP8Z68-VPRO:rvrRev1.xx:cvnChassisManufacture:ct3:cvrChassisVersion:
dmi.product.name: System Product Name
dmi.product.version: System Version
dmi.sys.vendor: System manufacturer

[Brad Figg (brad-figg)]

This bug is missing log files that will aid in diagnosing the problem. From a terminal window please run:

apport-collect 1264654

and then change the status of the bug to 'Confirmed'.

If, due to the nature of the issue you have encountered, you are unable to run this command, please add a comment stating that fact and change the bug status to 'Confirmed'.

This change has been made by an automated script, maintained by the Ubuntu Kernel Team.

[Lastique (andysem)]

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[Raymond (superquad-vortex2)]

USB Mixer: usb_id=0x046d082d, ctrlif=2, ctlerr=0
Card: HD Pro Webcam C920 at usb-0000:00:1d.0-1.6, high speed
  Unit: 5
    Control: name="Mic Capture Volume", index=0
    Info: id=5, control=2, cmask=0x0, channels=1, type="S16"
    Volume: min=5120, max=12800, dBmin=2000, dBmax=5000

0dB is not within dBmin 20dB and dBmax 50dB

post the pulseaudio verbose log

https://wiki.ubuntu.com/PulseAudio/Log

[Raymond (superquad-vortex2)]

 name: <alsa_input.usb-046d_HD_Pro_Webcam_C920_8E2D0CCF-02-C920.analog-stereo>
 driver: <module-alsa-card.c>
 flags: HARDWARE HW_MUTE_CTRL HW_VOLUME_CTRL DECIBEL_VOLUME LATENCY DYNAMIC_LATENCY
 state: SUSPENDED
 suspend cause: IDLE
 priority: 9049
 volume: 0: 76% 1: 76%
         0: -7.29 dB 1: -7.29 dB
         balance 0.00
 base volume: 15%
              -50.00 dB
 volume steps: 65537

[Raymond (superquad-vortex2)]

please change the capture volume from min to max in sound preference when you obtain the pulseaudio verbose log

[Lastique (andysem)]

Done. I changed the capture volume in pavucontrol for the camera device.

[Lastique (andysem)]

Sorry, this is my main working machine and it's inconvenient to install an unstable OS on it.

I installed 3.12 kernel for saucy though, and the problem persists. I didn't find 3.13 kernel for saucy, so I don't know if the problem is present in it as well.

[Lastique (andysem)]

After some experimenting I found that when I connect the camera to one of the black USB 2.0 ports I get the audio. The problem persists when I connect it to a USB 3.0 port or a red USB 2.0 port. I'm not sure what is the difference between the black and red ports. For the record, I have Asus P8Z68-V PRO GEN1.

[Lastique (andysem)]

> After some experimenting I found that when I connect the camera to one of the black USB 2.0 ports I get the audio.

I spoke too soon. The audio disappeared after reboot. I tried re-plugging the camera in the same or different USB port but it doesn't help. It seems the problem is not stable.

I tried booting Trusty live and installing 3.13 rc6 kernel on Saucy. In both cases I get no audio from the camera.

[penalvch (penalvch)]

Lastique, thank you for providing the requested information. Did this problem not occur in a release prior to Saucy?

[Lastique (andysem)]

I can't tell, I got the camera when I already had Saucy installed.

[penalvch (penalvch)]

Lastique, thank you for providing the requested information. For regression testing purposes, could you please test the 3.2.x series Precise release via http://old-releases.ubuntu.com/releases/precise/ and advise to the results?

[Lastique (andysem)]

It seems it is as unstable as in Saucy. Maybe it works more often than in Saucy but it is possible that I was just more lucky while testing.

[penalvch (penalvch)]

Lastique, the issue you are reporting is an upstream one. Could you please report this problem through the appropriate channel by following the instructions _verbatim_ at https://wiki.ubuntu.com/Bugs/Upstream/kernel ?

Please provide a direct URL to your e-mail to the mailing list once you have made it so that it may be tracked.

Thank you for your understanding.