Public bug reported:
Description: Ubuntu 16.04.2 LTS
Release: 16.04
What you expected to happen:
I mute the microphone and unmute it and the webcam should get audio in.
What happened instead:
The webcam stays muted (on the hardware side)
Description:
I have a Logitech C920 webcam with built in microphone. If I plug in the USB
the microphone works correctly. I can restart the computer and turn it on and
everything works correctly.
However, if I mute the video camera's microphone and then unmute it. I
cannot get any audio to come in via the camera.
The only way I can get it to work is to unplug the USB for 10 to 30
seconds and re plug it back in.
sudo pactl list sources
State: RUNNING
Name: alsa_input.usb-046d_HD_Pro_Webcam_C920_E8A213DF-02.analog-stereo
Description: HD Pro Webcam C920 Analogue Stereo
Driver: module-alsa-card.c
Sample Specification: s16le 2ch 32000Hz
Channel Map: front-left,front-right
Owner Module: 26
Mute: no
Volume: front-left: 66638 / 102% / 0.43 dB, front-right: 66638 / 102%
/ 0.43 dB
balance 0.00
Base Volume: 9619 / 15% / -50.00 dB
Monitor of Sink: n/a
Latency: 30 usec, configured 40000 usec
Flags: HARDWARE HW_MUTE_CTRL HW_VOLUME_CTRL DECIBEL_VOLUME LATENCY
Properties:
alsa.resolution_bits = "16"
device.api = "alsa"
device.class = "sound"
alsa.class = "generic"
alsa.subclass = "generic-mix"
alsa.name = "USB Audio"
alsa.id = "USB Audio"
alsa.subdevice = "0"
alsa.subdevice_name = "subdevice #0"
alsa.device = "0"
alsa.card = "2"
alsa.card_name = "HD Pro Webcam C920"
alsa.long_card_name = "HD Pro Webcam C920 at
usb-0000:00:14.0-5, high speed"
alsa.driver_name = "snd_usb_audio"
device.bus_path = "pci-0000:00:14.0-usb-0:5:1.2"
sysfs.path =
"/devices/pci0000:00/0000:00:14.0/usb1/1-5/1-5:1.2/sound/card2"
udev.id = "usb-046d_HD_Pro_Webcam_C920_E8A213DF-02"
device.bus = "usb"
device.vendor.id = "046d"
device.vendor.name = "Logitech, Inc."
device.product.id = "082d"
device.product.name = "HD Pro Webcam C920"
device.serial = "046d_HD_Pro_Webcam_C920_E8A213DF"
device.form_factor = "webcam"
device.string = "front:2"
device.buffering.buffer_size = "256000"
device.buffering.fragment_size = "128000"
device.access_mode = "mmap+timer"
device.profile.name = "analog-stereo"
device.profile.description = "Analogue Stereo"
device.description = "HD Pro Webcam C920 Analogue Stereo"
alsa.mixer_name = "USB Mixer"
alsa.components = "USB046d:082d"
module-udev-detect.discovered = "1"
device.icon_name = "camera-web-usb"
Ports:
analog-input-mic: Microphone (priority: 8700)
Active Port: analog-input-mic
Formats:
pcm
** Affects: linux (Ubuntu)
Importance: Undecided
Status: Incomplete
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https://bugs.launchpad.net/bugs/1668746
Title:
C920 Hardware Mute is set but not being unset.
Status in linux package in Ubuntu:
Incomplete
Bug description:
Description: Ubuntu 16.04.2 LTS
Release: 16.04
What you expected to happen:
I mute the microphone and unmute it and the webcam should get audio in.
What happened instead:
The webcam stays muted (on the hardware side)
Description:
I have a Logitech C920 webcam with built in microphone. If I plug in the USB
the microphone works correctly. I can restart the computer and turn it on and
everything works correctly.
However, if I mute the video camera's microphone and then unmute it. I
cannot get any audio to come in via the camera.
The only way I can get it to work is to unplug the USB for 10 to 30
seconds and re plug it back in.
sudo pactl list sources
State: RUNNING
Name: alsa_input.usb-046d_HD_Pro_Webcam_C920_E8A213DF-02.analog-stereo
Description: HD Pro Webcam C920 Analogue Stereo
Driver: module-alsa-card.c
Sample Specification: s16le 2ch 32000Hz
Channel Map: front-left,front-right
Owner Module: 26
Mute: no
Volume: front-left: 66638 / 102% / 0.43 dB, front-right: 66638 / 102%
/ 0.43 dB
balance 0.00
Base Volume: 9619 / 15% / -50.00 dB
Monitor of Sink: n/a
Latency: 30 usec, configured 40000 usec
Flags: HARDWARE HW_MUTE_CTRL HW_VOLUME_CTRL DECIBEL_VOLUME LATENCY
Properties:
alsa.resolution_bits = "16"
device.api = "alsa"
device.class = "sound"
alsa.class = "generic"
alsa.subclass = "generic-mix"
alsa.name = "USB Audio"
alsa.id = "USB Audio"
alsa.subdevice = "0"
alsa.subdevice_name = "subdevice #0"
alsa.device = "0"
alsa.card = "2"
alsa.card_name = "HD Pro Webcam C920"
alsa.long_card_name = "HD Pro Webcam C920 at
usb-0000:00:14.0-5, high speed"
alsa.driver_name = "snd_usb_audio"
device.bus_path = "pci-0000:00:14.0-usb-0:5:1.2"
sysfs.path =
"/devices/pci0000:00/0000:00:14.0/usb1/1-5/1-5:1.2/sound/card2"
udev.id = "usb-046d_HD_Pro_Webcam_C920_E8A213DF-02"
device.bus = "usb"
device.vendor.id = "046d"
device.vendor.name = "Logitech, Inc."
device.product.id = "082d"
device.product.name = "HD Pro Webcam C920"
device.serial = "046d_HD_Pro_Webcam_C920_E8A213DF"
device.form_factor = "webcam"
device.string = "front:2"
device.buffering.buffer_size = "256000"
device.buffering.fragment_size = "128000"
device.access_mode = "mmap+timer"
device.profile.name = "analog-stereo"
device.profile.description = "Analogue Stereo"
device.description = "HD Pro Webcam C920 Analogue Stereo"
alsa.mixer_name = "USB Mixer"
alsa.components = "USB046d:082d"
module-udev-detect.discovered = "1"
device.icon_name = "camera-web-usb"
Ports:
analog-input-mic: Microphone (priority: 8700)
Active Port: analog-input-mic
Formats:
pcm
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