Howdy! I have a situation where PulseAudio is "grabbing" a usb headset
before
fully initialized, thus not all features are being recognized.
More details here:
https://askubuntu.com/questions/537166/usb%2daudio%2ddevice%2dnot%2dfully%2d
working%2dafter%2dhotplug
You have to post output of alsa-info.sh and pactl list before and after
the
hot plug
This does not have my web cam attached.
Files attached. I also did a pulse restart, and captured the pactl list
output
after that too.
This look like priority issue if you have usb web cam mic and hotplug
usb
headset
https://git.kernel.org/cgit/linux/kernel/git/tiwai/sound.git/commit/sound/us...
This happens even without the USB web cam plugged in.
Another issue is some usb devices only obtained dB scale at a later time after the control is created
This may need some delay for pulseaudio to get dB scale
You can add printk statement to find out how much time you need
I've done zero kernel hacking, so can't really help there, sorry!
Unfotunately, you need to fix many things in kernel
Is this a notebook with internal 5.1 speakers with three jacks at rear panel (headphone , mic and line in) ?
1) large volume range of mic capture Volume and speaker playback volume
https://git.kernel.org/cgit/linux/kernel/git/tiwai/sound.git/commit/sound/us...
2) your 5.1 internal speaker have same priority