I am running Ubuntu 18.04, and I can't register any audio input. Under the sound settings, my internal speakers are listed, and when I plug in an external microphone, it's also listed, however speaking into either doesn't make the orange bar move. I have tried messing around with
pavucontrol (including unlocking the channels and turning one off), to no avail. I have also tried to use
hdajackretask in order to set the pin 0x12 to internal microphone (I also tried setting it to pin 0x13). Finally, I have tried removing
alsa-base, purging, and installing alsa-base, to no avail.
Any advice? Like I said, it seems like we can see the devices, but no audio is registering. I am on a Dell XPS 13 9360.