06-17-2020, 08:26 AM
This is probably something that's going to vary from distro to distro depending on which mechanism they're using to handle audio profiles. Saving and loading alsa mixer state is one approach. Profiles using alsaucm is another (see under /usr/share/alsa/ucm and/or /usr/share/alsa/ucm2). PulseAudio may present another option. Anything that's saving user changes really ought to have a 'revert to system defaults' option to get to known-good settings.