I have an Acer Swift 3 SF314-56 with Ubuntu 19.10 installed (the card is a Realtek ALC256).
My microphone does not work. I've tried lot of thing such as put the line "options snd-hda-intel model=acer-headset-multi" at the botton of the file "/etc/modprobe.d/alsa-base.conf". I've also installed HDAJackRetask and connected pin 012 and 013 to internal mic and bot ovveride. I've set Mic_Boost on alsamixer equal to zero.
Well, nothing worked. The mic is now not dectected at all. Could someone help me?
I missed an infornation. Ubuntu is installed in dual boot alongside windows 10 (which I use rarely). On windows the microphone is detected and works well.