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[Hui Wang <hui.wang@xxxxxxxxxxxxx>]

commit 8c69729b4439bbda88c3073df7243f755cc418ed
Author: Hui Wang <hui.wang@xxxxxxxxxxxxx>
Date:   Tue Nov 24 11:08:18 2015 +0800

    ALSA: hda - Fix headphone noise after Dell XPS 13 resume back from S3
    
    We have a machine Dell XPS 13 with the codec alc256, after resume back
    from S3, the headphone has noise when play sound.
    
    Through comparing with the coeff vaule before and after S3, we found
    restoring a coeff register will help remove noise.
    
    BugLink: https://bugs.launchpad.net/bugs/1519168
    Cc: Kailang Yang <kailang@xxxxxxxxxxx>
    Cc: <stable@xxxxxxxxxxxxxxx>
    Signed-off-by: Hui Wang <hui.wang@xxxxxxxxxxxxx>
    Signed-off-by: Takashi Iwai <tiwai@xxxxxxx>


** Changed in: hwe-next
       Status: In Progress => Fix Released

** Changed in: linux (Ubuntu)
       Status: In Progress => Fix Released

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https://bugs.launchpad.net/bugs/1519168

Title:
  There is noise for headphone playback after resume back from S3 for
  Dell XPS 13

Status in HWE Next:
  Fix Released
Status in linux package in Ubuntu:
  Fix Released

Bug description:
  Steps:
  1. Plug headset then check there is no noise
  2. Make system enter into S3
  3. Resume the system
  4. Check the headset status

  Expected results: Headset should not have any noise

  Actual results: Headset got current noise after S3

  This bug is used for tracking only, please do not triage.

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