Public bug reported:

== SRU Justification ==

* Impact:
There's unpleasant pop noise when headset is plugged in or removed from 
GHS/Line-out jack.

* Fix:
Issue can be fixed by these four patches. All of them are accepted by upstream.
- 4d4b0c52 - ALSA: hda/realtek - Add unplug function into unplug state of 
Headset Mode for ALC225
- d1dd4211 - ALSA: hda/realtek - Disable headset Mic VREF for headset mode of 
ALC225
- 136824ef - ALSA: hda/realtek - Add support headset mode for DELL WYSE AIO
- da484d00 - ALSA: hda/realtek - Add support headset mode for New DELL WYSE NB

* Testcase:
Connect/remove a headset to/from the jack and see if there's noise.

* Risk of Regression:
Low since these patches only affect specific platforms.

** Affects: hwe-next
     Importance: Undecided
     Assignee: Jesse Sung (wenchien)
         Status: New

** Affects: linux (Ubuntu)
     Importance: Undecided
     Assignee: Jesse Sung (wenchien)
         Status: In Progress


** Tags: carson originate-from-1812330

** Tags added: carson originate-from-1812330

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https://bugs.launchpad.net/bugs/1821290

Title:
  Pop noise when headset is plugged in or removed from GHS/Line-out jack

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