Comment 7 for bug 1257956

if your asus 1005px has only one jack for (headphone/mic in )

the jack has been retasked from headphone jack to mic jack

ode 0x1a [Pin Complex] wcaps 0x40018f: Stereo Amp-In Amp-Out
  Control: name="Headphone Playback Switch", index=0, device=0
    ControlAmp: chs=3, dir=Out, idx=0, ofs=0
  Control: name="Headphone Mic Boost Volume", index=0, device=0
    ControlAmp: chs=3, dir=In, idx=0, ofs=0
  Control: name="Headphone Mic Jack", index=0, device=0
  Amp-In caps: ofs=0x00, nsteps=0x03, stepsize=0x2f, mute=0
  Amp-In vals: [0x00 0x00]
  Amp-Out caps: ofs=0x00, nsteps=0x00, stepsize=0x00, mute=1
  Amp-Out vals: [0x00 0x00]
  Pincap 0x0000003c: IN OUT HP Detect
  Pin Default 0x0121441f: [Jack] HP Out at Ext Rear
    Conn = 1/8, Color = Green
    DefAssociation = 0x1, Sequence = 0xf
  Pin-ctls: 0x20: IN
  Unsolicited: tag=01, enabled=1
  Connection: 2
     0x0c* 0x0d

https://git.kernel.org/cgit/linux/kernel/git/tiwai/sound.git/commit/?id=ced4cefc75fdb8be95eaee325ad0f6b2fc0a484b

send email to the author that no headphone mic jack mode is created for you to retask the mic jack back to headphone jack

 control.8 {
  iface MIXER
  name 'Capture Source'
  value 'Headphone Mic'
  comment {
   access 'read write'
   type ENUMERATED
   count 1
   item.0 'Internal Mic'
   item.1 'Headphone Mic'
  }
 }