[Bug 2002373] Re: Mic Mute LED doesn't work on DMIC laptops

[Sebastien Bacher]

** Changed in: alsa-ucm-conf (Ubuntu Lunar)
       Status: Confirmed => Fix Committed

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https://bugs.launchpad.net/bugs/2002373

Title:
  Mic Mute LED doesn't work on DMIC laptops

Status in HWE Next:
  New
Status in OEM Priority Project:
  New
Status in alsa-ucm-conf package in Ubuntu:
  Fix Committed
Status in alsa-ucm-conf source package in Jammy:
  Fix Committed
Status in alsa-ucm-conf source package in Kinetic:
  Fix Committed
Status in alsa-ucm-conf source package in Lunar:
  Fix Committed

Bug description:
  [Impact]
  Mic mute LED doesn't work on Intel-based HP laptops.

  [Fix]
  Due to recent change on how kernel creates sound LEDs, there are two captures are registered, one from SoF and one from HDA. The SoF one is the "real" capture system uses.

  Since physical LED only gets light up when _all_ captures are muted,
  detach the HDA one so micmute LED only need to consider SoF capture's
  mute status.

  [Test]
  The mic mute LED works again on DMIC laptops.

  The legacy HDA systems are unaffected.

  [Where problems could occur]
  Theoretically the system may have more than two internal captures registered, then disabling one will not be enough.

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