[Bug 2006102] Re: Mic Mute LED doesn't work on Soundwire laptops

[Sebastien Bacher]

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

** Changed in: alsa-ucm-conf (Ubuntu Lunar)
     Assignee: (unassigned) => Andy Chi (andch)

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

** Changed in: alsa-ucm-conf (Ubuntu Kinetic)
     Assignee: (unassigned) => Andy Chi (andch)

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

** Changed in: alsa-ucm-conf (Ubuntu Jammy)
     Assignee: (unassigned) => Andy Chi (andch)

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https://bugs.launchpad.net/bugs/2006102

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

Status in OEM Priority Project:
  Fix Committed
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:
  Pull request:
  https://github.com/alsa-project/alsa-ucm-conf/pull/261

  [Impact]
  Mic mute LED doesn't work on Intel-based Dell 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 Soundwire laptops.

  The legacy HDA/DMIC 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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