[M660SRU, VIA VT1708, Pink Mic, Front] No autoswitch

[asdasd]

everytime i want to use the onboard microphone ,it needs to open the alsamixer so as to change the volume either more loudly or less and after that it needs to open the pulseaudio in order to choose the right device.Then it could work.However .if reboot the systemm ,i should repeat this procedure.
thank you !

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: alsa-base 1.0.25+dfsg-0ubuntu4
ProcVersionSignature: Ubuntu 3.13.0-24.47-generic 3.13.9
Uname: Linux 3.13.0-24-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.14.1-0ubuntu3
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: sofia 1739 F.... pulseaudio
CurrentDesktop: Unity
Date: Fri May 23 01:13:34 2014
InstallationDate: Installed on 2014-05-22 (0 days ago)
InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
PackageArchitecture: all
SourcePackage: alsa-driver
Symptom: audio
Symptom_Card: VT8237A/VT8251 HDA Controller - HDA VIA VT82xx
Symptom_Jack: Pink Mic, Front
Symptom_Type: No auto-switch between inputs
Title: [M660SRU, VIA VT1708, Pink Mic, Front] No autoswitch
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 02/18/2008
dmi.bios.vendor: Phoenix Technologies LTD
dmi.bios.version: 6.00
dmi.board.asset.tag: Tag 12345
dmi.board.name: M660/670SRU
dmi.board.vendor: Clevo
dmi.board.version: VT6363A
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 1
dmi.chassis.vendor: VIA
dmi.chassis.version: N/A
dmi.modalias: dmi:bvnPhoenixTechnologiesLTD:bvr6.00:bd02/18/2008:svnClevo:pnM660SRU:pvrVT6363A:rvnClevo:rnM660/670SRU:rvrVT6363A:cvnVIA:ct1:cvrN/A:
dmi.product.name: M660SRU
dmi.product.version: VT6363A
dmi.sys.vendor: Clevo

[Raymond (superquad-vortex2)]

it is unlikely front Mic is selected automatically

there are four capture source

control.21 {
  iface MIXER
  name 'Capture Source'
  value Line
  comment {
   access 'read write'
   type ENUMERATED
   count 1
   item.0 'Rear Mic'
   item.1 'Front Mic'
   item.2 Line
   item.3 CD
  }
 }

although support Jack detection but does not support unsolicited event

it is using a timer to monitor the state of headphone jack when the playback device is open

Node 0x21 [Pin Complex] wcaps 0x400101: Stereo
  Control: name="Front Mic Jack", index=0, device=0
  Pincap 0x00000334: IN OUT Detect
    Vref caps: HIZ 50
  Pin Default 0x02a190f0: [Jack] Mic at Ext Front
    Conn = 1/8, Color = Pink
    DefAssociation = 0xf, Sequence = 0x0
  Pin-ctls: 0x21: IN VREF_50
  Connection: 1
     0x1b

[Raymond (superquad-vortex2)]

Simple mixer control 'Channel Mode',0
  Capabilities: enum
  Items: '2ch' '4ch' '6ch'
  Item0: '6ch'

when rear Mic and line in are retasked

https://git.kernel.org/cgit/linux/kernel/git/tiwai/sound.git/commit/sound/pci/hda/patch_via.c?id=f1e762ddc8035f803d15f8c524151bf788482ec2

there are five capture sources

stereo mix which the audio mixer 0x17 which is a mix of audio output and the input sources

Node 0x18 [Audio Selector] wcaps 0x300101: Stereo
  Connection: 5
     0x17 0x24 0x1d 0x1e* 0x21

Node 0x17 [Audio Mixer] wcaps 0x20010b: Stereo Amp-In
  Control: name="Rear Mic Playback Volume", index=0, device=0
    ControlAmp: chs=3, dir=In, idx=2, ofs=0
  Control: name="Rear Mic Playback Switch", index=0, device=0
    ControlAmp: chs=3, dir=In, idx=2, ofs=0
  Control: name="Front Mic Playback Volume", index=0, device=0
    ControlAmp: chs=3, dir=In, idx=4, ofs=0
  Control: name="Front Mic Playback Switch", index=0, device=0
    ControlAmp: chs=3, dir=In, idx=4, ofs=0
  Control: name="Line Playback Volume", index=0, device=0
    ControlAmp: chs=3, dir=In, idx=3, ofs=0
  Control: name="Line Playback Switch", index=0, device=0
    ControlAmp: chs=3, dir=In, idx=3, ofs=0
  Control: name="CD Playback Volume", index=0, device=0
    ControlAmp: chs=3, dir=In, idx=1, ofs=0
  Control: name="CD Playback Switch", index=0, device=0
    ControlAmp: chs=3, dir=In, idx=1, ofs=0
  Amp-In caps: ofs=0x17, nsteps=0x1f, stepsize=0x06, mute=1
  Amp-In vals: [0x17 0x17] [0x80 0x80] [0x9f 0x9f] [0x9f 0x9f] [0x9e 0x9e] [0x17 0x17]
  Connection: 6
     0x10 0x24 0x1d 0x1e 0x21 0x13

[Marcus Tomlinson (marcustomlinson)]

This release of Ubuntu is no longer receiving maintenance updates. If this is still an issue on a maintained version of Ubuntu please let us know.

[Launchpad Janitor (janitor)]

[Expired for alsa-driver (Ubuntu) because there has been no activity for 60 days.]