** Also affects: linux (Ubuntu Cosmic)
   Importance: Critical
     Assignee: Hui Wang (hui.wang)
       Status: Incomplete

** Also affects: linux (Ubuntu Bionic)
   Importance: Undecided
       Status: New

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https://bugs.launchpad.net/bugs/1797292

Title:
  The front MIC can't work on the Lenovo M715

Status in HWE Next:
  New
Status in linux package in Ubuntu:
  Incomplete
Status in linux source package in Bionic:
  New
Status in linux source package in Cosmic:
  Incomplete

Bug description:
  [Impact]
  On the machine of Lenovo M715, there are 2 audio jacks on the front panel,
  one of them is microphone jack. When we plug a micrphone into it, the system
  can't detect this microphone and can't record sound via this microphone too.

  
  [Fix]
  Apply the quirk of ALC294_FIXUP_LENOVO_MIC_LOCATION, the alsa driver will
  assign a different name to this audio jack, then pulseaudio can handle this
  jack and everything works well.

  
  [Test Case]
  plug a microphone to this jack and record sound, system can detect the
  microphone and can record sound.

  [Regression Potential]
  Very low, this pin configuration is specific to the machine of
  M715 so far, will not affect other machines.

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