Did this issue start happening after an update/upgrade? Was there a prior kernel version where you were not having this particular problem?
Would it be possible for you to test the latest upstream kernel? Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest v4.10 kernel[0]. If this bug is fixed in the mainline kernel, please add the following tag 'kernel-fixed-upstream'. If the mainline kernel does not fix this bug, please add the tag: 'kernel-bug-exists-upstream'. Once testing of the upstream kernel is complete, please mark this bug as "Confirmed". Thanks in advance. [0] http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.10.1 ** Changed in: linux (Ubuntu) Importance: Undecided => Medium -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. 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 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1668746/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
