[Bug 2067338] Re: Long SysEx messages are skipped by Midi-Bridge

[Erich Eickmeyer]

As I'm only a MOTU and this is in main, I must request sponosrship from
a core-dev. However, I have confirmed that this fixes the bug.

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https://bugs.launchpad.net/bugs/2067338

Title:
  Long SysEx messages are skipped by Midi-Bridge

Status in PipeWire:
  Unknown
Status in pipewire package in Ubuntu:
  Fix Released
Status in pipewire source package in Noble:
  In Progress
Status in pipewire source package in Oracular:
  Fix Released

Bug description:
  [Impact]

  A regression in 1.0.5 has been found in PipeWire and is fixed in
  1.0.7.

  Users of certain MIDI controllers that rely on long SysEx messages are
  unable to function properly. I noticed this when reconnecting my
  Beheringer X-Touch (shown here:
  https://nextcloud.ericheickmeyer.com/index.php/s/k9Aa9Bq7RDD5DoR)
  after the installation of 24.04 LTS, it could not operate properly.
  Disabling pipewire-jack and running ardour's internal jack
  functionality caused it to work properly.

  Investigation consisted of backporting 1.0.7 via a PPA to Noble which
  fixed the bug. Bug was confirmed via
  https://gitlab.freedesktop.org/pipewire/pipewire/-/issues/4005.
  Solving bug via SRU will consist of creating patches from the commits
  that fixed the issue in upstream PipeWire.

  [Test Case]

  Using Ubuntu Studio

   * Connect a MIDI controller that uses long SysEx messages, such as a
  Behringer X-Touch, to the system.

   * Star Ardour

   * In Preferences > Control Surfaces > Mackie, select the MIDI
  controller for "Surface sends via:" and "Surface receives via:".

  Expected: complete control population and function
  Actual: Only display colors are populated

  [What could go wrong]

  It is possible that these patches could cause other problems outside
  of long SysEx messages in MIDI controllers. However, these patches
  were developed by the lead developer of PipeWire, Wim Taymans, and I
  tend to trust that he knows exactly what he's doing with this kind of
  thing.

  ProblemType: Bug
  DistroRelease: Ubuntu 24.04
  Package: pipewire 1.0.5-1
  ProcVersionSignature: Ubuntu 6.8.0-31.31.1-lowlatency 6.8.1
  Uname: Linux 6.8.0-31-lowlatency x86_64
  NonfreeKernelModules: nvidia_modeset nvidia
  ApportVersion: 2.28.1-0ubuntu3
  Architecture: amd64
  CasperMD5CheckResult: pass
  CurrentDesktop: KDE
  Date: Mon May 27 20:35:49 2024
  InstallationDate: Installed on 2024-04-15 (42 days ago)
  InstallationMedia: Ubuntu-Studio 24.04 LTS "Noble Numbat" - Beta amd64 (20240410.2)
  SourcePackage: pipewire
  UpgradeStatus: No upgrade log present (probably fresh install)

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