[Aspire V3-572PG] External mic not detected and/or used trrs jack ALC283

[Jérémi Campagna]

1) Ubuntu version : 18.04.1

2)
alsa-utils:
  Installé : 1.1.3-1ubuntu1
  Candidat : 1.1.3-1ubuntu1
 Table de version :
 *** 1.1.3-1ubuntu1 500
        500 http://ca.archive.ubuntu.com/ubuntu bionic/main amd64 Packages
        100 /var/lib/dpkg/status
alsa-base:
  Installé : 1.0.25+dfsg-0ubuntu5
  Candidat : 1.0.25+dfsg-0ubuntu5
 Table de version :
 *** 1.0.25+dfsg-0ubuntu5 500
        500 http://ca.archive.ubuntu.com/ubuntu bionic/main amd64 Packages
        500 http://ca.archive.ubuntu.com/ubuntu bionic/main i386 Packages
        100 /var/lib/dpkg/status
3) I expected my headset's microphone to be used by the system directly or at least to be able to "toggle" it

4) It's not even recognized and keeps using my laptop's internal microphone. I did tests using Discord and when I got closer to my laptop's internal mic, my voice was louder as my friends reported. I could see on some graphs like pavucontrol's that it was the case. But it never happened when I got my headset's mic close to my mouth.

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: alsa-base 1.0.25+dfsg-0ubuntu5
ProcVersionSignature: Ubuntu 4.15.0-43.46-generic 4.15.18
Uname: Linux 4.15.0-43-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.20.9-0ubuntu7.5
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/pcmC1D0c: mikasu 1794 F...m pulseaudio
 /dev/snd/pcmC1D0p: mikasu 1794 F...m pulseaudio
 /dev/snd/controlC1: mikasu 1794 F.... pulseaudio
 /dev/snd/controlC0: mikasu 1794 F.... pulseaudio
CurrentDesktop: ubuntu:GNOME
Date: Tue Jan 1 02:09:45 2019
InstallationDate: Installed on 2018-10-15 (78 days ago)
InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426)
PackageArchitecture: all
SourcePackage: alsa-driver
Symptom: audio
Title: PCI/internal sound card not detected
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 09/15/2015
dmi.bios.vendor: Insyde Corp.
dmi.bios.version: V1.32
dmi.board.asset.tag: Type2 - Board Asset Tag
dmi.board.name: EA50_HB
dmi.board.vendor: Acer
dmi.board.version: V1.32
dmi.chassis.type: 10
dmi.chassis.vendor: Acer
dmi.chassis.version: V1.32
dmi.modalias: dmi:bvnInsydeCorp.:bvrV1.32:bd09/15/2015:svnAcer:pnAspireV3-572PG:pvrV1.32:rvnAcer:rnEA50_HB:rvrV1.32:cvnAcer:ct10:cvrV1.32:
dmi.product.family: BDW
dmi.product.name: Aspire V3-572PG
dmi.product.version: V1.32
dmi.sys.vendor: Acer
mtime.conffile..etc.modprobe.d.alsa-base.conf: 2019-01-01T02:05:33.595406