Week ago everything worked fine.
Now neither internal microphone nor webcam can capture sound.
lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 20.04.5 LTS
Release: 20.04
Codename: focal
play -l
shows
**** List of PLAYBACK Hardware Devices ****
card 0: Dock [WD15 Dock], device 0: USB Audio [USB Audio]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 0: Dock [WD15 Dock], device 1: USB Audio [USB Audio #1]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 2: PCH [HDA Intel PCH], device 0: ALC3246 Analog [ALC3246 Analog]
Subdevices: 0/1
Subdevice #0: subdevice #0
card 2: PCH [HDA Intel PCH], device 3: HDMI 0 [HDMI 0]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 2: PCH [HDA Intel PCH], device 7: HDMI 1 [HDMI 1]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 2: PCH [HDA Intel PCH], device 8: HDMI 2 [HDMI 2]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 2: PCH [HDA Intel PCH], device 9: HDMI 3 [HDMI 3]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 2: PCH [HDA Intel PCH], device 10: HDMI 4 [HDMI 4]
Subdevices: 1/1
Subdevice #0: subdevice #0
cat /proc/asound/cards
shows
0 [Dock ]: USB-Audio - WD15 Dock
Dell-WD15-Dock
1 [H2300 ]: USB-Audio - HP Webcam HD 2300
Hewlett Packard HP Webcam HD 2300 at usb-0000:00:14.0-2, high speed
2 [PCH ]: HDA-Intel - HDA Intel PCH
HDA Intel PCH at 0xec248000 irq 137