Audio input not working; greyed out in pavucontrol [Ubuntu 18.04.5 LTS]

Audio input used to work fine.

I tried restarting pulseaudio with killall pulseaudio and pulseaudio -k, followed by pulseaudio --start

pavucontrol screenshots:

Also I looked up how to list audio input devices and tried that, in case it's helpful:

$ aplay --list-devices
**** List of PLAYBACK Hardware Devices ****
card 0: HDMI [HDA Intel HDMI], device 3: HDMI 0 [HDMI 0] Subdevices: 1/1 Subdevice #0: subdevice #0
card 0: HDMI [HDA Intel HDMI], device 7: HDMI 1 [HDMI 1] Subdevices: 1/1 Subdevice #0: subdevice #0
card 0: HDMI [HDA Intel HDMI], device 8: HDMI 2 [HDMI 2] Subdevices: 1/1 Subdevice #0: subdevice #0
card 0: HDMI [HDA Intel HDMI], device 9: HDMI 3 [HDMI 3] Subdevices: 1/1 Subdevice #0: subdevice #0
card 0: HDMI [HDA Intel HDMI], device 10: HDMI 4 [HDMI 4] Subdevices: 1/1 Subdevice #0: subdevice #0
card 1: PCH [HDA Intel PCH], device 0: ALC3232 Analog [ALC3232 Analog] Subdevices: 1/1 Subdevice #0: subdevice #0

$ arecord -l
**** List of CAPTURE Hardware Devices ****
card 1: PCH [HDA Intel PCH], device 0: ALC3232 Analog [ALC3232 Analog] Subdevices: 1/1 Subdevice #0: subdevice #0

That's my built-in mic right? I don't know where to go from here.

2 Answers

I see in your Built-In Analog Stereo, you have it on mute (Is it not?) Click on it (the, muted speaker button) to Un-Mute it, does that help?

EDIT: I had this problem exactly today, a quick copy & paste from my own post:

No sound 18.04 and tried all the answers I can find

I (In my case) solved it by

removing pavucontrol
rebooting
Install pavucontrol again,
and it started working!

To do this in the Terminal:

sudo apt remove pavucontrol
sudo apt autoremove
sudo reboot
sudo apt-get install pavucontrol

Hope this solves itself!

Good luck!

Go to Settings -> Sound -> Input. Check the status of your microphone. It may have the volume at zero.