Public bug reported:

After login to the desktop on Dell Inspiron 3162
there's a very loud background noise comes from the builtin speaker.
The noise does not go away even if the speaker is muted.

The noise disappears after disabling the analog audio loopback.

** Affects: linux (Ubuntu)
     Importance: Undecided
     Assignee: Kai-Heng Feng (kaihengfeng)
         Status: Confirmed

** Changed in: linux (Ubuntu)
     Assignee: (unassigned) => Kai-Heng Feng (kaihengfeng)

** Changed in: linux (Ubuntu)
       Status: New => Confirmed

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https://bugs.launchpad.net/bugs/1549620

Title:
  Background Noise on Dell Inspiron 3162.

Status in linux package in Ubuntu:
  Confirmed

Bug description:
  After login to the desktop on Dell Inspiron 3162
  there's a very loud background noise comes from the builtin speaker.
  The noise does not go away even if the speaker is muted.

  The noise disappears after disabling the analog audio loopback.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1549620/+subscriptions

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