Mic (a Logitech usb webcam) is not working after resuming from hibernation but does from suspend,
- it is grayed out in systemsettings
- no idea if it ever worked properly as the webcam is new

this is the dmesg when plugging in

[29168.436677] usb 2-1.8: new full-speed USB device number 5 using ehci-pci
[29168.522884] usb 2-1.8: New USB device found, idVendor=046d, idProduct=08ad
[29168.522889] usb 2-1.8: New USB device strings: Mfr=0, Product=0, SerialNumber=0
[29168.523188] gspca_main: gspca_zc3xx-2.14.0 probing 046d:08ad
[29169.392983] input: gspca_zc3xx as /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.8/input/input28

there were some error messages in dmesg:

[29163.561950] gspca_zc3xx 2-1.8:1.0: URB error -71, resubmitting
[29163.585926] gspca_zc3xx 2-1.8:1.0: URB error -71, resubmitting

removing and re-loading the gspca kernel module doesn't fix it, nor did restarting pulseaudio

restarting KDE (instead of rebooting) fixes it

thanks,

Does the appropriate device appear under /dev/snd/ and are the ownership / permissions correct?

device appears and is same permissions as all other /dev/snd

from dmesg [29168.523188] gspca_main: gspca_zc3xx-2.14.0 probing 046d:08ad
# ls -l /dev/snd/by-id/usb-046d_08ad-01
lrwxrwxrwx 1 root root 12 Dec 13 17:32 /dev/snd/by-id/usb-046d_08ad-01 -> ../controlC2
# ls -l /dev/snd/controlC2
crw-rw----+ 1 root audio 116, 12 Dec 13 17:32 /dev/snd/controlC2

only thing I found relevant Google'ing was to use: /sbin/alsa force-reload, but there is no alsa command

Can you check the output of "pactl list" from a session where it isn't working, and a session from when it is?
It sounds like Pulseaudio needs a full/proper restart to detect the device...

I did a diff of the 2 pactl --list outputs and the difference appears to be that when working the following section is present:

Code: Select all

Source #1
   State: SUSPENDED
   Name: alsa_input.usb-046d_08ad-01-U0x46d0x8ad.analog-mono
   Description: QuickCam Communicate STX Analog Mono
   Driver: module-alsa-card.c
   Sample Specification: s16le 1ch 8000Hz
   Channel Map: mono
   Owner Module: 8
   Mute: no
   Volume: mono: 20726 /  32% / -30.00 dB
           balance 0.00
   Base Volume: 6554 /  10% / -60.00 dB
   Monitor of Sink: n/a
   Latency: 0 usec, configured 0 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 = "USB Device 0x46d:0x8ad"
      alsa.long_card_name = "USB Device 0x46d:0x8ad at usb-0000:00:1d.0-1.8, full speed"
      alsa.driver_name = "snd_usb_audio"
      device.bus_path = "pci-0000:00:1d.0-usb-0:1.8:1.1"
      sysfs.path = "/devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.8/2-1.8:1.1/sound/card2"
      udev.id = "usb-046d_08ad-01-U0x46d0x8ad"
      device.bus = "usb"
      device.vendor.id = "046d"
      device.vendor.name = "Logitech, Inc."
      device.product.id = "08ad"
      device.product.name = "QuickCam Communicate STX"
      device.serial = "046d_08ad"
      device.string = "hw:2"
      device.buffering.buffer_size = "32000"
      device.buffering.fragment_size = "16000"
      device.access_mode = "mmap+timer"
      device.profile.name = "analog-mono"
      device.profile.description = "Analog Mono"
      device.description = "QuickCam Communicate STX Analog Mono"
      alsa.mixer_name = "USB Mixer"
      alsa.components = "USB046d:08ad"
      module-udev-detect.discovered = "1"
      device.icon_name = "audio-card-usb"
   Ports:
      analog-input-mic: Microphone (priority: 8700)
   Active Port: analog-input-mic
   Formats:
      pcm

Interesting. After logging out can you check to see if any "pulseaudio" processes are running on your system?
Also, does disconnecting and reconnecting the webcam result in Pulseaudio detecting it?

update: the mic is now available and working after hibernation, it could have been due to an upgrade but there wasn't anything obvious upgraded.

If the issue has not since recurred and everything is fixed, can you mark the topic as solved?