Pulse Audio

killall pulseaudio pulseudio -v

pacmd list-sinks pacmd list-cards

Only USB camera and NVIDIA HDMI outputs are visible.

pacmd list-cards
 
2 card(s) available.
    index: 0
	name: <alsa_card.pci-0000_01_00.1>
	driver: <module-alsa-card.c>
	owner module: 6
	properties:
		alsa.card = "1"
                alsa.card_name = "HDA NVidia"
 
index: 1
	name: <alsa_card.usb-046d_0825_38C54AA0-02-U0x46d0x825>
	driver: <module-alsa-card.c>
	owner module: 7
	properties:
		alsa.card = "2"
		alsa.card_name = "USB Device 0x46d:0x825"
                device.product.name = "Webcam C270"

pusleaudio -v shows lots of

I: [pulseaudio] alsa-util.c: Error opening PCM device front:1: No such file or directory
I: [pulseaudio] (alsa-lib)pcm_hw.c: open '/dev/snd/pcmC1D0c' failed (-2)
I: [pulseaudio] alsa-util.c: Error opening PCM device hw:1: No such file or directory

killall pulseaudio
rm ~/.config/pulse/*
pulseaudio -v