[Bug 1836552] Re: [SRU] Please detect sound and X server running on Windows

[Łukasz Zemczak]

This bug number has been invalidly included in the latest wslu backports
to disco, bionic and xenial, so by accepting the SRUs they have changed
the status to Fix Committed. But since this is a direct backport of the
focal version, I do not require explicit re-testing of this bug as part
of the verification.

Please switch to verification-done-* whenever you're done with all the
other verification.

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https://bugs.launchpad.net/bugs/1836552

Title:
  [SRU] Please detect sound and X server running on Windows

Status in wslu package in Ubuntu:
  Fix Released
Status in wslu source package in Xenial:
  Fix Committed
Status in wslu source package in Bionic:
  Fix Committed
Status in wslu source package in Disco:
  Fix Committed

Bug description:
  [Impact]

   * Ubuntu in WSL does not detect the PulseAudio or X11 server running
  on Windows. Detecting them is easy and doing so improves the setup
  experience.

  [Test Case]

   * Install and start PulseAudio for Windows ( https://wiki.ubuntu.com/WSL#Enabling_Sound )
   * Install and start an X11 server for Windows ( https://wiki.ubuntu.com/WSL#Running_Graphical_Applications )
   * Start the Ubuntu WSL terminal
   * Make sure pulseaudio is not installed:
     $ pulseaudio

     Command 'pulseaudio' not found, but can be installed with:

     apt install pulseaudio

   * Install Firefox inside Ubuntu and play videos with sound
     $ sudo apt install firefox
     $ firefox https://youtube.com

   * Install pulseaudio
     $ sudo apt install pulseaudio
   * Close all Ubuntu WSL sessions
   * Start the Ubuntu WSL terminal again
   * Play videos with Firefox again, they should still work

  [Regression Potential]

   * Since the detection takes place in setting the profile mistakes in
  the implementation may trigger errors show to the users on login.

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