This bug is awaiting verification that the kernel in -proposed solves
the problem. Please test the kernel and update this bug with the
results. If the problem is solved, change the tag 'verification-needed-
eoan' to 'verification-done-eoan'. If the problem still exists, change
the tag 'verification-needed-eoan' to 'verification-failed-eoan'.

If verification is not done by 5 working days from today, this fix will
be dropped from the source code, and this bug will be closed.

See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how
to enable and use -proposed. Thank you!


** Tags added: verification-needed-eoan

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https://bugs.launchpad.net/bugs/1871284

Title:
  alsa: make the dmic detection align to the mainline kernel-5.6

Status in linux package in Ubuntu:
  Fix Released
Status in linux-oem-5.6 package in Ubuntu:
  Fix Committed
Status in linux source package in Eoan:
  Fix Committed
Status in linux-oem-5.6 source package in Eoan:
  Invalid
Status in linux source package in Focal:
  Fix Released
Status in linux-oem-5.6 source package in Focal:
  Fix Committed

Bug description:
  This patchset is already in the upstream kernel-5.6, so no need to
  send for unstable.
  And this patchset will remove an existing kernel module and add a new
  kernel module, so need to change the ABI/modules.ignore manually.
  The module removed: snd-intel-nhlt.ko
  The module added:   snd-intel-dspcfg.ko

  [Impact]
  There is already dmic detection code in the eoan and focal kernel, it
  works well on CNL/WHL and later Intel platforms, but it doesn't work
  on KBL, SKL and old Intel machines.
  https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1869799/comments/14

  [Fix]
  The upstream kernel updated the dmic detection code, it will exclude the
  old intel machines by default. Then the old machines will use legacy hda
  driver like before.

  [Test Case]
  Install the testing kernel to Dell/LENOVO WHL/CNL and later machines,
  they work as well as before.

  And a user verifed the testing kernel work on his KBL machine.
  https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1869799/comments/17

  [Regression Risk]
  Low, those patches come from mainline kernel, I have tested those patches
  on the WHL/CNL and later machiens, a user tested it on a KBL machine.

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