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 ** Attachment added: "unplugged built-in microphone" https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/1840725/+attachment/5311999/+files/pulseunplugged.png -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1840725 Title: Microphone not working in Ubuntu 18.04.3 LTS on new hp- spectre-x360-convertible-15 laptop To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/1840725/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs