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[Eugene San <eugenesan@xxxxxxxxx>]

@anthonywong
Referenced report seems as unrelated.

On my machine, the sound is clear and loud but 10 seconds after playback
ends the noise starts.

I am not familiar with specific design of the soundcard but It
looks/sounds like when it suspended by the driver, analog amplifier left
active picking all kind of interferences from ground line.

Kernel versions 4.4.0-1x and 4.6.0RCx are affected.

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https://bugs.launchpad.net/bugs/1468582

Title:
  Noisy (pop noise + white noise) headphone audio on Dell XPS 13 (2015)

Status in HWE Next:
  Fix Released
Status in linux package in Ubuntu:
  Fix Released
Status in linux source package in Trusty:
  Fix Committed
Status in linux source package in Utopic:
  Fix Committed
Status in linux source package in Vivid:
  Fix Released

Bug description:
  This was reported through community and brought up to support. They
  fixed the bug via kernel bug tracker.

  https://bugzilla.kernel.org/show_bug.cgi?id=99851

  We should backport to 3.13, 3.16 and 3.19

  This bug is used for tracking purposes. Please do not triage.

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