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[Robie Basak <1969798@xxxxxxxxxxxxxxxxxx>]

> For that reason, I do apologize for the large diff, and I hope this is
a good explanation for that and the bugs fixes covered in the diff.
Rather than filing separate bug reports for each of these, I'd rather
get it all taken care of with at once here.

Please see
https://wiki.ubuntu.com/StableReleaseUpdates#New_upstream_microreleases.
Either the "upstream QA process must be documented/demonstrated and
linked from the SRU tracking bug" and meet the quality requirements in
our policy, or you need to track and verify every bugfix you're trying
to land here.

** Changed in: carla (Ubuntu Jammy)
       Status: In Progress => Incomplete

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https://bugs.launchpad.net/bugs/1969798

Title:
  [SRU] Carla can't find plugins in plugin directories located in the
  user's home

Status in carla package in Ubuntu:
  Fix Released
Status in carla source package in Jammy:
  Incomplete
Status in carla source package in Kinetic:
  Fix Released

Bug description:
  [Impact]

  Users of Carla are unable to refresh audio plugins when more are
  installed, i.e. in the user's home directory. Furthermore, this can
  cause Carla to crash.

  [Test Plan]

   * Launch Carla
   * Click "Add Plugin"
   * Click "Refresh"
   * Click "Scan"

   Expected: Carla will scan for new plugins and find them.

   Actual: Carla does not scan for plugins, and may crash.

  [Where problems could occur]

   * This may simply cause a regression in Carla in which save files may
  cease to load or other issues with plugins loading, however this is
  highly unlikely.

  [Other Info]

  Originally the plan for this SRU was to upload a patched version of
  Carla 2.4.2 which did not work as planned. 2.4.3 FTBFS when uploaded
  to Kinetic, as did 2.4.4 when uploaded to a PPA built against Kinetic.
  Eventually, it was proven that 2.4.4 would build cleanly in Jammy and
  introduces essential bugfixes, including this fix as well as fixes
  Python 3.10 compatibility issues that were merely patched before.

  It is to be noted that this upstream version does *NOT* introduce any
  new features, and the upstream developer was aware that any fixes he
  made in this release could not introduce new features and could only
  introduce bugfixes. As stated from the changelog, these bugfixes,
  including the one in this SRU, include:

   * Fix inaccurate MIDI CC rounding
   * Fix python3.10 compatibility issues
   * Fix integration with internal Qt toolbar visibility state

  From a usability standpoint, these are essential fixes in
  functionality.

  It is also to be noted that the upstream developer primarily develops
  on focal for focal and bionic and was unaware of the primary issue
  until it was brought to his attention, but could not work it until he
  had a docker image of jammy in a stable release. It was at that point
  he discovered the other issues.

  For that reason, I do apologize for the large diff, and I hope this is
  a good explanation for that and the bugs fixes covered in the diff.
  Rather than filing separate bug reports for each of these, I'd rather
  get it all taken care of with at once here.

  - Erich Eickmeyer

  Original bug report as follows:
  ------

  In the LV2 location in my home directory .lv2 I have the following
  plugin:

  ➜ ls ~/.lv2
  librnnoise_lv2.so

  ${HOME}/.lv2 is configured in Carla as a search path.

  In the Add Plugin dialog for Carla if I search for noise nothing shows
  up.

  This worked fine previously on 21.10.

  Release notes for Carla 2.4.3 [1] include this line: Fix plugin search
  (regression from 2.4.2)

  Ubuntu Studio 22.04 currently has the bugged version:

  ➜ carla --version
  Using Carla version 2.4.2

  [1] https://github.com/falkTX/Carla/releases/tag/v2.4.3

  ProblemType: Bug
  DistroRelease: Ubuntu 22.04
  Package: carla 2.4.2-0ubuntu2
  ProcVersionSignature: Ubuntu 5.15.0-24.24-lowlatency 5.15.30
  Uname: Linux 5.15.0-24-lowlatency x86_64
  NonfreeKernelModules: nvidia_modeset nvidia
  ApportVersion: 2.20.11-0ubuntu82
  Architecture: amd64
  CasperMD5CheckResult: unknown
  CurrentDesktop: KDE
  Date: Thu Apr 21 15:41:13 2022
  InstallationDate: Installed on 2022-04-20 (1 days ago)
  InstallationMedia: Ubuntu-Studio 22.04 LTS "Jammy Jellyfish" - Beta amd64 (20220329.1)
  SourcePackage: carla
  UpgradeStatus: No upgrade log present (probably fresh install)

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