USB Audio on 0 Volume on Startup – Sound Issue

I had a similar issue with my laptop where the default sound device was actually the headphone jack.

If you use alsamixer to make everything the way it should be, then use the command alsactl store it will store those preferences. Then I put as a startup command alsactl restore and every time I logged in it was reset to my original settings. Hope this helps!

You can achive what you want by using an udev rule that is written to act upon certain events. In this case these events are to plug usb sound card and to unplug it. According to this forum answer, possible solution is like following:

1. Open the file that has usb sound card udev rules:

   sudo -H nautilus /etc/udev/rules.d/10-usb-sound-card.rules
   

2. Paste and copy

   KERNEL=="pcmC[D0-9cp]*", ACTION=="add", PROGRAM="/bin/sh -c 'K=%k; K=$${K#pcmC}; K=$${K%%D*}; echo defaults.ctl.card $$K > /etc/asound.conf; echo defaults.pcm.card $$K >>/etc/asound.conf"
   
   KERNEL=="pcmC[D0-9cp]*", ACTION=="remove", PROGRAM="/bin/sh -c 'echo defaults.ctl.card 0 > /etc/asound.conf; echo defaults.pcm.card 0 >>/etc/asound.conf'"
   

3. Save the file and give

   sudo udevadm trigger --action=add /etc/udev/rules.d/10-usb-sound-card.rules
   

command. Then test this rule by pluging and unpluging your usb sound card.

I hope this will help you.