first I'd like to thank you for providing this Report with a crash file.
This allowed us to extract some helpful information as to where the crash happens.
Your stacktrace indicates the following:
- Yoshimi was running with UI
- The Desktop runs under Wayland
- the Crash happens when the UI toolkit (FLTK) draws a widget
If you would like to refer to this comment somewhere else in this project, copy and paste the following link:
Using jack_audio for audio and alsa_midi for midi
manual found
Found 4435 instruments in 112 banks
Root 5. Bank set to 5 "Arpeggios"
Set jack session callback failed
Alsa midi priority is 39
Build Number 2392
Clientname: yoshimi
Audio: jack -> 'default'
Midi: alsa -> 'default'
Oscilsize: 512
Samplerate: 48000
Period size: 256
Yay! We're up and running :-)
yoshimi>
(yoshimi:6070): dconf-WARNING **: 19:18:23.679: unable to open file '/etc/dconf/db/site': Failed to open file “/etc/dconf/db/site”: open() failed: No such file or directory; expect degraded performance
Segmentation fault (core dumped)
However, the workaround works OK
$ FLTK_BACKEND=x11 yoshimi
yoshimi 2.3.4.1 is starting...
Using jack_audio for audio and alsa_midi for midi
manual found
Found 4435 instruments in 112 banks
Root 5. Bank set to 5 "Arpeggios"
Set jack session callback failed
Alsa midi priority is 1
Build Number 2392
Clientname: yoshimi
Audio: jack -> 'default'
Midi: alsa -> 'default'
Oscilsize: 512
Samplerate: 48000
Period size: 256
Yay! We're up and running :-)
yoshimi> Main Engine initialised
Is this a self-build, or package. i.e. where did you get Yoshimi from. Also what Yoshimi version is it?
Version 2.3.4.1, downloaded from the Ubuntu App Centre.
On Thu, 30 Oct 2025 at 17:35, Will Godfrey abrolag@users.sourceforge.net
wrote:
Related
Bugs: #40
Crash report added
Hi Derek,
first I'd like to thank you for providing this Report with a crash file.
This allowed us to extract some helpful information as to where the crash happens.
Your stacktrace indicates the following:
- Yoshimi was running with UI
- The Desktop runs under Wayland
- the Crash happens when the UI toolkit (FLTK) draws a widget
We could confirm that this problem is related to using Wayland.
Further technical details are still actively investigated.
For now, there is a simple workaround
* open a terminal
* start yoshimi by typing this commanline
FLTK_BACKEND=x11 yoshimiGUI doesn't load on Ubuntu Studio 25.10 either.
CLI (crash report attached):
yoshimi 2.3.4.1 is starting...
Start-up Synth-Instance(0)...
-----Connect-attempt----(jack_audio/alsa_midi)----
finding manual
-----Connect-SUCCESS-------------------
Using jack_audio for audio and alsa_midi for midi
manual found
Found 4435 instruments in 112 banks
Root 5. Bank set to 5 "Arpeggios"
Set jack session callback failed
Alsa midi priority is 39
Build Number 2392
Clientname: yoshimi
Audio: jack -> 'default'
Midi: alsa -> 'default'
Oscilsize: 512
Samplerate: 48000
Period size: 256
Yay! We're up and running :-)
yoshimi>
(yoshimi:6070): dconf-WARNING **: 19:18:23.679: unable to open file '/etc/dconf/db/site': Failed to open file “/etc/dconf/db/site”: open() failed: No such file or directory; expect degraded performance
Segmentation fault (core dumped)
However, the workaround works OK
$ FLTK_BACKEND=x11 yoshimi
yoshimi 2.3.4.1 is starting...
Start-up Synth-Instance(0)...
-----Connect-attempt----(jack_audio/alsa_midi)----
finding manual
-----Connect-SUCCESS-------------------
Using jack_audio for audio and alsa_midi for midi
manual found
Found 4435 instruments in 112 banks
Root 5. Bank set to 5 "Arpeggios"
Set jack session callback failed
Alsa midi priority is 1
Build Number 2392
Clientname: yoshimi
Audio: jack -> 'default'
Midi: alsa -> 'default'
Oscilsize: 512
Samplerate: 48000
Period size: 256
Yay! We're up and running :-)
yoshimi> Main Engine initialised