** Description changed:
- Yoshimi plugin works in Ardour when using plasma-session-x11, but causes
- application hang and crash under plasma-session-wayland, which is the
- default in Ubuntu Studio 26.04.
+ [Impact]
+ Certain plugins crash when launched inside of Ardour when Ardour is launched
in Wayland. The workaround and fix is to run it with `FLTK_BACKEND=x11` on
launch, which can be added to the .desktop file.
+
+ [Test Case]
+ While running in a Wayland session:
+ * Launch Ardour
+ * Add a channel, then add Yoshimi as a plugin to that channel.
+
+ Expected: Yoshimi can be added and the GUI can be opened from within Ardour.
+ Actual: Ardour crashes.
+
+ [What could go wrong]
+ Adding `FLTK_BACKEND=x11` as an environment variable to the launcher means
that the application will no longer scale itself with Wayland. However, Ardour
doesn't have any Wayland or X11-controlled scaling as the application does its
own scaling depending on user preferences or suggestions based on the display
size and DPI. Therefore, any regression that can be caused by this fix is
highly unlikely.
+
+ [Original bug]
+ Yoshimi plugin works in Ardour when using plasma-session-x11, but causes
application hang and crash under plasma-session-wayland, which is the default
in Ubuntu Studio 26.04.
It seems that the plugin works correctly in Ardour when Ardour is
launched with environment variable `FLTK_BACKEND=x11`.
ProblemType: Bug
DistroRelease: Ubuntu 26.04
Package: yoshimi 2.3.6-1
ProcVersionSignature: Ubuntu 7.0.0-28.28-generic 7.0.12
Uname: Linux 7.0.0-28-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.34.1-0ubuntu0.1
Architecture: amd64
CasperMD5CheckResult: pass
CurrentDesktop: KDE
Date: Thu Jul 30 23:45:12 2026
InstallationDate: Installed on 2026-07-25 (5 days ago)
InstallationMedia: Ubuntu-Studio 26.04 "Resolute Raccoon" - Release amd64
(20260423.1)
SourcePackage: yoshimi
UpgradeStatus: No upgrade log present (probably fresh install)
** Changed in: ardour (Ubuntu)
Importance: Undecided => High
** Changed in: ardour (Ubuntu)
Assignee: (unassigned) => Erich Eickmeyer (eeickmeyer)
** Summary changed:
- Ardour crashes when trying to use Yoshimi plugin
+ [SRU] Ardour crashes when trying to use Yoshimi plugin
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https://bugs.launchpad.net/bugs/2162384
Title:
[SRU] Ardour crashes when trying to use Yoshimi plugin
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