This bug was fixed in the package linux-oem-5.6 - 5.6.0-1013.13

---------------
linux-oem-5.6 (5.6.0-1013.13) focal; urgency=medium

  * focal/linux-oem-5.6: 5.6.0-1013.13 -proposed tracker (LP: #1884492)

  * Support Audio Mute LED for two new HP laptops (LP: #1884251)
    - ALSA: hda/realtek - Add supported new mute Led for HP
    - ALSA: hda/realtek - Add HP new mute led supported for ALC236
    - ALSA: hda/realtek: Add mute LED and micmute LED support for HP systems

  * alsa: front mics could not work on a couple of Lenovo ThinkCenter machines
    (LP: #1882613)
    - SAUCE: ALSA: hda/realtek - add a pintbl quirk for several Lenovo machines

 -- Timo Aaltonen <timo.aalto...@canonical.com>  Mon, 22 Jun 2020
12:27:18 +0300

** Changed in: linux-oem-5.6 (Ubuntu Focal)
       Status: Fix Committed => Fix Released

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https://bugs.launchpad.net/bugs/1882613

Title:
  alsa: front mics could not work on a couple of Lenovo ThinkCenter
  machines

Status in HWE Next:
  New
Status in linux-oem-5.6 package in Ubuntu:
  New
Status in linux-oem-5.6 source package in Focal:
  Fix Released

Bug description:
  This patch is cced to stable kernel, so it will be merged to other
  ubuntu kernels automatically, and because the oem project schedule, we
  need to merge this patch to oem-5.6 first.

  [Impact]
  There are 2 front mic on those lenovo thinkcenter machines, but all
  front mics can't work.

  [Fix]
  change the location for one of the mics, then pulseaudio could handle
  them.

  [Test Case]
  Boot the kernel with this patch, plug microphone/headset to either
  front mic jack, the mic could be detected and could record the sound.

  [Regression Risk]
  Low, just adding a new pintbl to match those lenovo machines.

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