control.24 { iface CARD name 'Mic Jack' value false comment { access
read type BOOLEAN count 1 } } control.25 { iface CARD name 'Mic Jack'
index 1 value true comment { access read type BOOLEAN count 1 } }
control.26 { iface CARD name 'Line Jack' value false comment { access
read type BOOLEAN count 1 } }

Seem node 0x18 is your mic jack. Index=1

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https://bugs.launchpad.net/bugs/1565420

Title:
  [TMP645-M, Realtek ALC282, Pink Mic, Left] No sound at all

Status in alsa-driver package in Ubuntu:
  New

Bug description:
  Hi,

  I have an issue using the headset microphone. 
  hdajacksensetest will happily report the insertion and presence 
  of the headset (with two separate 3.5mm for input and output):
  Pin 0x18 (Pink Mic, Left side): present = Yes

  If I use alsamixer to increase the levels, and enable the "loopback", 
  I can hear the input in the headphones, but no levels are visible 
  running "SoundRecorder". 

  Happy to test whatever can help here. System is 
  an Acer TravelMate P645-M V4DA2 running 16.04 
  current as of 2nd of April. 

  Yours, Steffen

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: alsa-base 1.0.25+dfsg-0ubuntu5
  ProcVersionSignature: Ubuntu 4.4.0-16.32-generic 4.4.6
  Uname: Linux 4.4.0-16-generic x86_64
  ApportVersion: 2.20.1-0ubuntu1
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  sneumann   2087 F.... pulseaudio
   /dev/snd/controlC1:  sneumann   2087 F.... pulseaudio
  CurrentDesktop: Unity
  Date: Sun Apr  3 10:48:58 2016
  InstallationDate: Installed on 2016-03-20 (13 days ago)
  InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Alpha amd64 (20160307)
  PackageArchitecture: all
  SourcePackage: alsa-driver
  Symptom: audio
  Symptom_AlsaRecordingTest: ALSA recording test through plughw:PCH failed
  Symptom_Card: Built-in Audio - HDA Intel PCH
  Symptom_DevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  sneumann   2087 F.... pulseaudio
   /dev/snd/controlC1:  sneumann   2087 F.... pulseaudio
  Symptom_Jack: Pink Mic, Left
  Symptom_Type: No sound at all
  Title: [TMP645-M, Realtek ALC282, Pink Mic, Left] No sound at all
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 01/14/2014
  dmi.bios.vendor: Insyde Corp.
  dmi.bios.version: V2.07
  dmi.board.asset.tag: Type2 - Board Asset Tag
  dmi.board.name: BAD40_HW
  dmi.board.vendor: Acer
  dmi.board.version: V2.07
  dmi.chassis.asset.tag: Chassis Asset Tag
  dmi.chassis.type: 10
  dmi.chassis.vendor: Acer
  dmi.chassis.version: Chassis Version
  dmi.modalias: 
dmi:bvnInsydeCorp.:bvrV2.07:bd01/14/2014:svnAcer:pnTMP645-M:pvrV2.07:rvnAcer:rnBAD40_HW:rvrV2.07:cvnAcer:ct10:cvrChassisVersion:
  dmi.product.name: TMP645-M
  dmi.product.version: V2.07
  dmi.sys.vendor: Acer

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