Comment 24 for bug 677734

>> arecord: pcm_read:1692: read error: Input/output error

you have to ask the alsa developer for this issue since 44100 Hz , 16bits and 2 channels is still supported by 0x1f , 0x12 and 0x20, I have no idea why

However many users expect they can use the internal mic by default

>> Headset jack has audio. Jack sense does not mute speakers.

Simple mixer control 'Independent HP',0
  Capabilities: enum
  Items: 'OFF' 'ON'
  Item0: 'ON'

http://git.alsa-project.org/?p=alsa-kernel.git;a=commit;h=0713efebfa1a1878feeeb17cbadc3d2d2c9e9ed2

the inactive controls are grey in color if you are using alsamixer

or compare the output of amixer and "amixer -i"

amixer -h

Available options
  -i,--inactive show also inactive controls

**** List of PLAYBACK Hardware Devices ****
card 0: Intel [HDA Intel], device 0: VT1702 Analog [VT1702 Analog]
  Subdevices: 1/2
  Subdevice #0: subdevice #0
  Subdevice #1: subdevice #1

Node 0x17 [Pin Complex] wcaps 0x40058d: Stereo Amp-Out
  Amp-Out caps: ofs=0x00, nsteps=0x00, stepsize=0x00, mute=1
  Amp-Out vals: [0x00 0x00]
  Pincap 0x0000001c: OUT HP Detect
  Pin Default 0x0221401f: [Jack] HP Out at Ext Front
    Conn = 1/8, Color = Green
    DefAssociation = 0x1, Sequence = 0xf
  Pin-ctls: 0xc0: OUT HP
  Unsolicited: tag=01, enabled=1
  Power: setting=D0, actual=D0
  Connection: 2
     0x1d 0x1a*