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[Erich Eickmeyer <2018695@xxxxxxxxxxxxxxxxxx>]

** Changed in: ubuntustudio-meta (Ubuntu Mantic)
       Status: In Progress => Fix Committed

** Description changed:

  [Impact]
  
  Ubuntu Studio introduced a way to switch between the new PipeWire-based
  audio configuration and the older JACK/PulseAudio-based audio
  configuration in the 23.04 release cycle. This was not without
  complications throughout the entire process as PulseAudio had become so
  deeply embedded that even the germinate seed had some assumptions that
  PulseAudio would never go away.
  
  As such, in order to prevent PulseAudio dependencies from automatically
  installing where equivalent PipeWire alternatives exist via `pipewire-
  pulse`, `pipewire-pulse` had to be seeded as a pre-seed for the
  `ubuntustudio-audio` and `ubuntustudio-video` seeds in order to prevent
  image build failures.
  
  However, since pipewire-pulse was seeded as a hard dependency and not as
  a recommends, when one went to switch to the pulseaudio configuration
  via the `ubuntstudio-pulseaudio-config` package, it would uninstall the
  ubuntustudio-audio and ubuntustudio-video metapackages. Upon attempting
  to reinstall those metapackages, it would reinstall pipewire-pulse,
  which would break the ubuntustudio-pulseaudio-config package.
  
  A fix is to this would be as simple as demoting the pre-seed of
  pipewire-pulse to recommends.
  
  [Test Case]
  
-  * Install Ubuntu Studio 23.04
-  
-  * Install ubutustudio-pulseaudio-config
-    - Notice ubuntustudio-audio and ubuntustudio-video would be REMOVED. This is not desired.
+  * Install Ubuntu Studio 23.04
  
-  * Further testing can continue from here, but removal of those two
+  * Install ubutustudio-pulseaudio-config
+    - Notice ubuntustudio-audio and ubuntustudio-video would be REMOVED. This is not desired.
+ 
+  * Further testing can continue from here, but removal of those two
  metapackages is proof enough of the breakage.
  
  [Regression Potential]
  
  The biggest regression potential in this would be that seeds in Mantic
  would have trouble building as a result of this change. I don't see this
  as happening as the entire point is to simply get it in before
  pulseaudio, and that happens regardless of depends or recommends.
+ 
+ [Other Information]
+ 
+ This issue was not caught as a seed update was done after beta freeze to
+ fix an image build failure. A meta update was done just prior to final
+ freeze by Steve Langasek and this issue was not tested. This issue was
+ found by a user and brought up in IRC chat.

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https://bugs.launchpad.net/bugs/2018695

Title:
  [SRU] Hard-Dependency on pipewire-pulse preventing audio config switch
  without packaging issues

Status in ubuntustudio-meta package in Ubuntu:
  Fix Committed
Status in ubuntustudio-meta source package in Lunar:
  In Progress
Status in ubuntustudio-meta source package in Mantic:
  Fix Committed

Bug description:
  [Impact]

  Ubuntu Studio introduced a way to switch between the new PipeWire-
  based audio configuration and the older JACK/PulseAudio-based audio
  configuration in the 23.04 release cycle. This was not without
  complications throughout the entire process as PulseAudio had become
  so deeply embedded that even the germinate seed had some assumptions
  that PulseAudio would never go away.

  As such, in order to prevent PulseAudio dependencies from
  automatically installing where equivalent PipeWire alternatives exist
  via `pipewire-pulse`, `pipewire-pulse` had to be seeded as a pre-seed
  for the `ubuntustudio-audio` and `ubuntustudio-video` seeds in order
  to prevent image build failures.

  However, since pipewire-pulse was seeded as a hard dependency and not
  as a recommends, when one went to switch to the pulseaudio
  configuration via the `ubuntstudio-pulseaudio-config` package, it
  would uninstall the ubuntustudio-audio and ubuntustudio-video
  metapackages. Upon attempting to reinstall those metapackages, it
  would reinstall pipewire-pulse, which would break the ubuntustudio-
  pulseaudio-config package.

  A fix is to this would be as simple as demoting the pre-seed of
  pipewire-pulse to recommends.

  [Test Case]

   * Install Ubuntu Studio 23.04

   * Install ubutustudio-pulseaudio-config
     - Notice ubuntustudio-audio and ubuntustudio-video would be REMOVED. This is not desired.

   * Further testing can continue from here, but removal of those two
  metapackages is proof enough of the breakage.

  [Regression Potential]

  The biggest regression potential in this would be that seeds in Mantic
  would have trouble building as a result of this change. I don't see
  this as happening as the entire point is to simply get it in before
  pulseaudio, and that happens regardless of depends or recommends.

  [Other Information]

  This issue was not caught as a seed update was done after beta freeze
  to fix an image build failure. A meta update was done just prior to
  final freeze by Steve Langasek and this issue was not tested. This
  issue was found by a user and brought up in IRC chat.

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