Public bug reported:

[Impact]
Mute LED isn't on after the audio output is muted.

[Fix]
Use HDA codec to control GPIO 4 to enable mute LED support.

[Test]
After applying the patch, mute LED works with mute hotkey or disable
sound in Gnome Control Center.
        
[Regression Potential]
Low. This fix only target at one specific laptop.

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: Incomplete

** Affects: linux (Ubuntu Focal)
     Importance: Undecided
         Status: Incomplete

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https://bugs.launchpad.net/bugs/1871090

Title:
  Add Mute LED support for an HP laptop

Status in linux package in Ubuntu:
  Incomplete
Status in linux source package in Focal:
  Incomplete

Bug description:
  [Impact]
  Mute LED isn't on after the audio output is muted.

  [Fix]
  Use HDA codec to control GPIO 4 to enable mute LED support.

  [Test]
  After applying the patch, mute LED works with mute hotkey or disable
  sound in Gnome Control Center.
          
  [Regression Potential]
  Low. This fix only target at one specific laptop.

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