Public bug reported:

OS: Linux Mint 18.2
Audacity version: 2.2.2 from ubuntuhandbook repo
Alsa log: 
http://www.alsa-project.org/db/?f=46cdccac7c37f25f2acd6c567ae56cd58aba2f0b

I just installed Audacity to make a quick edit on a MP3 file. I
installed 2.1.2 from the default Linux Mint 18 repo, opened Audacity and
selected my file. It played over my headphones just fine. I closed
Audacity, then immediately opened it again to select a different file to
edit. As Audacity opened I heard an audible 'click' over my headphones.
I could no longer hear anything over my headphones whether in Audacity
or via browser/youtube or other media player.

I discovered an AskUbuntu question with the same problem. An answer
there said that we just needed to open Audacity and select Internal
Mic:0. Tried that, and presto had audio over my headphones again.

Another answer on the same AU question recommended upgrading from 2.1.2
to the current (then) version of 2.2.0 to get around the bug in the
future. So, I uninstalled 2.1.2, and installed 2.2.2 from the
ubuntuhandbook repo.

Opened Audacity 2.2.2, only to discover that I now have no headphone
volume again, and this time changing the output to Internal Mic:0 did
not work. In fact, I cannot get headphone output on any of the 10 output
options. Nothing plays over headphones now, not youtube/browser, not
files in VLC.

All of this occurred in less than 5 minutes, and I am left without an
ability to use my laptop's headphone jack.

** Affects: alsa-driver (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: audacity headphones

** Summary changed:

- lost headphone output
+ Installation of Audacity causes headphone output to no longer work

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You received this bug notification because you are a member of Desktop
Packages, which is subscribed to alsa-driver in Ubuntu.
https://bugs.launchpad.net/bugs/1751871

Title:
  Installation of Audacity causes headphone output to no longer work

Status in alsa-driver package in Ubuntu:
  New

Bug description:
  OS: Linux Mint 18.2
  Audacity version: 2.2.2 from ubuntuhandbook repo
  Alsa log: 
http://www.alsa-project.org/db/?f=46cdccac7c37f25f2acd6c567ae56cd58aba2f0b

  I just installed Audacity to make a quick edit on a MP3 file. I
  installed 2.1.2 from the default Linux Mint 18 repo, opened Audacity
  and selected my file. It played over my headphones just fine. I closed
  Audacity, then immediately opened it again to select a different file
  to edit. As Audacity opened I heard an audible 'click' over my
  headphones. I could no longer hear anything over my headphones whether
  in Audacity or via browser/youtube or other media player.

  I discovered an AskUbuntu question with the same problem. An answer
  there said that we just needed to open Audacity and select Internal
  Mic:0. Tried that, and presto had audio over my headphones again.

  Another answer on the same AU question recommended upgrading from
  2.1.2 to the current (then) version of 2.2.0 to get around the bug in
  the future. So, I uninstalled 2.1.2, and installed 2.2.2 from the
  ubuntuhandbook repo.

  Opened Audacity 2.2.2, only to discover that I now have no headphone
  volume again, and this time changing the output to Internal Mic:0 did
  not work. In fact, I cannot get headphone output on any of the 10
  output options. Nothing plays over headphones now, not
  youtube/browser, not files in VLC.

  All of this occurred in less than 5 minutes, and I am left without an
  ability to use my laptop's headphone jack.

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