Same problem here, the microphone shows as (unplugged) in the PulseAudio Volume Control. Ubuntu 18.04.3 LTS.
❯ uname -a Linux luisz-G3-3590 5.0.0-37-generic #40~18.04.1-Ubuntu SMP Thu Nov 14 12:06:39 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux
❯ arecord -l **** List of CAPTURE Hardware Devices **** card 0: PCH [HDA Intel PCH], device 0: ALC3254 Analog [ALC3254 Analog] Subdevices: 0/1 Subdevice #0: subdevice #0 card 0: PCH [HDA Intel PCH], device 2: ALC3254 Alt Analog [ALC3254 Alt Analog] Subdevices: 1/1 Subdevice #0: subdevice #0
Same problem here, the microphone shows as (unplugged) in the PulseAudio Volume Control. Ubuntu 18.04.3 LTS.
❯ uname -a
Linux luisz-G3-3590 5.0.0-37-generic #40~18.04.1-Ubuntu SMP Thu Nov 14 12:06:39 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux
❯ arecord -l
**** List of CAPTURE Hardware Devices ****
card 0: PCH [HDA Intel PCH], device 0: ALC3254 Analog [ALC3254 Analog]
Subdevices: 0/1
Subdevice #0: subdevice #0
card 0: PCH [HDA Intel PCH], device 2: ALC3254 Alt Analog [ALC3254 Alt Analog]
Subdevices: 1/1
Subdevice #0: subdevice #0