Ubuntu 14.04 reached end of standard support in April 2019:
https://wiki.ubuntu.com/Releases
If you would like to continue with free support then please update to a
newer Ubuntu version and tell us if the problem still occurs.
If you would like to continue with Ubuntu 14.04 then there is a pai
if you don't use pulseaudio, you need to change the order of the onboard
and hdmi by /etc/modprobe.d/alsa-base.conf so that your PCH are card 0
instead of card 1
options snd-hda-Intel index=1,0
ARECORD
List of CAPTURE Hardware Devices
card 1: PCH [HDA Intel PCH], device 0: VT1802 Ana