[SRU][Cosmic/Bionic/OEM-B][PATCH 0/1] The front MIC can't work on the Lenovo M715

[Hui Wang]

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

[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.

Hui Wang (1):
  ALSA: hda/realtek - Fix the problem of the front MIC on the Lenovo
    M715

 sound/pci/hda/patch_realtek.c | 6 ++++++
 1 file changed, 6 insertions(+)

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2.7.4