Plugins crash upon opening gui in Ardour 6

I’m pretty new to linux and DAWs in general so not very knowledgeable in neither but I’ve been trying to find what’s the issue causing the Zyn plugin to open a blank window and then crash after a few seconds when opening the gui.
I don’t know if it’s related but I’ve been getting a visual glitch with the Vital plugin, it works correctly when opening the first time in the session but if I close the gui and then open it again various segments of the gui are blank though they work. But sometimes I get a crash with Vital too if I open and close the gui too often.

I uninstalled Ardour and got the following warning:

Warning: carla optionally requires lv2-host: for the LV2 plugin
Warning: carla optionally requires vst-host: for the VST plugin
Warning: rubberband optionally requires ladspa-host: for LADSPA plugin
Warning: zynaddsubfx optionally requires lv2-host: for using the LV2 plugin
Warning: zynaddsubfx optionally requires vst-host: for using the VST plugin

I searched around but don’t know how I’m supposed to implement these hosts.

I tried launching the plugins with Carla and got the same results as with Ardour (Zyn not launching and Vital launching correctly on first try but with artifacts on subsequent launches + eventual crash) so the issue is not Ardour but something with my machine and the plugins. Probably having to do with the lv2/vst/ladspa hosts?

Below is the log from the terminal when opening a new empty session in Ardour and lanching Zyn gui (LV2).
The distro I’m using is Manjaro KDE.

Ardour6.9.0 (built using 6.9 and GCC version 11.2.0)
Ardour: [INFO]: Your system is configured to limit Ardour to 524288 open files
Ardour: [INFO]: Loading system configuration file /etc/ardour6/system_config
Ardour: [INFO]: Loading user configuration file /home/gianluca/.config/ardour6/config
Ardour: [INFO]: CPU vendor: AuthenticAMD
Ardour: [INFO]: AVX-capable processor
Ardour: [INFO]: AVX with FMA capable processor
Ardour: [INFO]: CPU brand: AMD Ryzen 5 3500X 6-Core Processor
Ardour: [INFO]: Using AVX and FMA optimized routines
Ardour: [INFO]: Loading plugin meta data file /usr/share/ardour6/plugin_metadata/plugin_tags
Ardour: [INFO]: Loading plugin statistics file /home/gianluca/.config/ardour6/plugin_metadata/plugin_stats
Ardour: [INFO]: Loading default ui configuration file /etc/ardour6/default_ui_config
Ardour: [INFO]: Loading user ui configuration file /home/gianluca/.config/ardour6/ui_config
Ardour: [INFO]: Loading 452 MIDI patches from /usr/share/ardour6/patchfiles
Ardour: [INFO]: Loading color file /usr/share/ardour6/themes/dark-ardour.colors
Ardour: [INFO]: Loading ui configuration file /etc/ardour6/clearlooks.rc
Ardour: [INFO]: Loading bindings from /etc/ardour6/ardour.keys
Loading ui configuration file /etc/ardour6/clearlooks.rc
Found nothing along /home/gianluca/.config/ardour6/templates:/usr/share/ardour6/templates
Scanning folders for bundled LV2s: /usr/lib/ardour6/LV2
Set cursor set to default
Reading player:ZynAddSubFX took 1 microseconds, final size = 0
lo server running on 17010
[INFO] Opened the zynaddsubfx UI…
[INFO] Ready to run
[INFO:Zyn] zest_open()
[INFO:Zyn] zest_open(osc.udp://127.0.0.1:17010)
[INFO:Zyn] Found Assets at /usr/lib/zynaddsubfx/
[INFO:Zyn] Starting Zyn-Fusion
[INFO:Zyn] Thanks for supporting the development of this project
[INFO:Zyn] Creating MRuby Interpreter…
[debug] parsing json file
[debug] json parsed succesfully
zsh: segmentation fault (core dumped) ardour6
   ~  watched PID no longer exists - releasing device.

I tried debugging with gdb but wasn’t able to, I installed the program and tried running Ardour with it using the command:
/opt/ardour/bin/ardour6 --gdb
but turns out there is no Ardour directory in /opt.

Thanks in advance for any help

I believe you have to buy the supported version for there to be Ardour in the /opt. https://community.ardour.org/download If you are using the Manjaro repository then I assume Ardour would not be installed in /opt, I could be wrong. Ardour is an LV2 host and also a vst host. LV2, vst and LADSPA are plugins formats that the Ardour host is capable of using/playing. I have not used carla but it might also be a program that can use/play LV2 vst and LADSPA plugins. The uninstall warnings might be telling you that you have removed the hosts the plugins need to be useful but I have no experience with Manjaro. Making everything work together that comes from the repo is an ongoing process in a rolling release distro maybe make some bug reports. Have you tried any of the other plugins that you can install from the repo, do they work?

Correct, ardour from a distribution repository will be in /usr/bin/ and ardour downloaded from Ardour.org will be in /opt/Ardour-.

Plugins should statically link any GUI toolkit needed, otherwise there is a possibility of conflict with the plugin host if the host and plugin are expecting different GUI library versions.

I do not know if that is the cause of the current problem with Zyn, but that was the case in 2017, and the release notes do not mention a change to static linking since then.
I do see noted in a discussion elsewhere that “upstream zyn-fusion LV2 is already fixed to statically link against those libs.”
I am not completely familiar with Zyn, so I am not sure if the currently shipping ZynAddSubFx versions are the same as what used to be referred to as zyn-fusion, but it appears that may be the case. If so, you may have better success using the LV2 plugins instead of VST.

Have you tried Yoshimi as a comparison? Yoshimi started out as a fork of Zyn 2.4, but has had a lot of changes since then, it may work if Zyn does not.

Hi studioinabox, thanks for the reply.
Indeed I installed Ardour from the Manjaro repository,
The reason for the warning being to let me know that I removed the hosts that those plugins use makes perfect sense, though I would expect also Vital to be flagged with Zyn and Carla. Maybe it works differtly idk
I installed and launched Helm and Surge and both seem to be working just fine, up to now the only plugins that have given me issues are Vital and Zyn.
I’d just move on and not use them, especially Zyn, but I’d like to follow some videos from Unfa and I saw that he uses them extensively.

Thanks for the reply Chris.

I just tried Yoshimi as you suggested and it works fine (of course of all the plugins the only ones that have issues are the 2 I’m most interested to use…)

I just noticed also that I get different results if I use Vital LV2 or VST3 and Zyn LV2 or VST.
Vital LV2 works but if I close and reopen it gets some visual artifacts, with VST3 there are no issues.
Zyn LV2 is the one I described in the first post (opens blank window then crashes after a few seconds) while with VST it crashes immediately.

Thanks to your tips I got to run Ardour with gbd.
Here is the log for when I launched it and tried opening Zyn LV2 (though it didn’t crash, it just opened the blank window):

Starting program: /usr/lib/ardour6/ardour-6.9.0
[Thread debugging using libthread_db enabled]
Using host libthread_db library “/usr/lib/libthread_db.so.1”.
Ardour6.9.0 (built using 6.9 and GCC version 11.2.0)
Ardour: [INFO]: Your system is configured to limit Ardour to 524288 open files
Ardour: [INFO]: Loading system configuration file /etc/ardour6/system_config
Ardour: [INFO]: Loading user configuration file /home/gianluca/.config/ardour6/config
[New Thread 0x7ffff0bb3640 (LWP 577208)]
Ardour: [INFO]: CPU vendor: AuthenticAMD
Ardour: [INFO]: AVX-capable processor
Ardour: [INFO]: AVX with FMA capable processor
Ardour: [INFO]: CPU brand: AMD Ryzen 5 3500X 6-Core Processor
Ardour: [INFO]: Using AVX and FMA optimized routines
[New Thread 0x7fffebfff640 (LWP 577209)]
[New Thread 0x7fffeb7fe640 (LWP 577210)]
[New Thread 0x7fffeaffd640 (LWP 577211)]
Ardour: [INFO]: Loading plugin meta data file /usr/share/ardour6/plugin_metadata/plugin_tags
Ardour: [INFO]: Loading plugin statistics file /home/gianluca/.config/ardour6/plugin_metadata/plugin_stats
[New Thread 0x7fffea69d640 (LWP 577250)]
[Thread 0x7fffea69d640 (LWP 577250) exited]
[New Thread 0x7fffea69d640 (LWP 577281)]
[New Thread 0x7fffe9b48640 (LWP 577282)]
[New Thread 0x7fffe9214640 (LWP 577283)]
Ardour: [INFO]: Loading default ui configuration file /etc/ardour6/default_ui_config
Ardour: [INFO]: Loading user ui configuration file /home/gianluca/.config/ardour6/ui_config
Ardour: [INFO]: Loading 452 MIDI patches from /usr/share/ardour6/patchfiles
[New Thread 0x7fffe899d640 (LWP 577290)]
[Thread 0x7fffe899d640 (LWP 577290) exited]
[New Thread 0x7fffe899d640 (LWP 577292)]
[New Thread 0x7fffcbfff640 (LWP 577293)]
[Thread 0x7fffe899d640 (LWP 577292) exited]
[New Thread 0x7fffcbfff640 (LWP 577294)]
[Thread 0x7fffcbfff640 (LWP 577293) exited]
[New Thread 0x7fffe899d640 (LWP 577295)]
[Thread 0x7fffcbfff640 (LWP 577294) exited]
[Thread 0x7fffe899d640 (LWP 577295) exited]
[New Thread 0x7fffe899d640 (LWP 577296)]
[New Thread 0x7fffcbfff640 (LWP 577297)]
[Thread 0x7fffe899d640 (LWP 577296) exited]
[Thread 0x7fffcbfff640 (LWP 577297) exited]
Ardour: [INFO]: Loading color file /usr/share/ardour6/themes/dark-ardour.colors
Ardour: [INFO]: Loading ui configuration file /etc/ardour6/clearlooks.rc
[New Thread 0x7fffcbfff640 (LWP 577298)]
[New Thread 0x7fffe899d640 (LWP 577299)]
[Thread 0x7fffcbfff640 (LWP 577298) exited]
[New Thread 0x7fffcbfff640 (LWP 577300)]
[New Thread 0x7fffcb7cf640 (LWP 577301)]
[Thread 0x7fffe899d640 (LWP 577299) exited]
[Thread 0x7fffcbfff640 (LWP 577300) exited]
[New Thread 0x7fffcbfff640 (LWP 577302)]
[New Thread 0x7fffe899d640 (LWP 577303)]
[Thread 0x7fffcbfff640 (LWP 577302) exited]
[New Thread 0x7fffcbfff640 (LWP 577304)]
[New Thread 0x7fffcafce640 (LWP 577305)]
[Thread 0x7fffcb7cf640 (LWP 577301) exited]
[Thread 0x7fffe899d640 (LWP 577303) exited]
[Thread 0x7fffcbfff640 (LWP 577304) exited]
[Thread 0x7fffcafce640 (LWP 577305) exited]
Ardour: [INFO]: Loading bindings from /etc/ardour6/ardour.keys
Loading ui configuration file /etc/ardour6/clearlooks.rc
[New Thread 0x7fffcafce640 (LWP 577306)]
[New Thread 0x7fffcbfff640 (LWP 577307)]
[Thread 0x7fffcafce640 (LWP 577306) exited]
[New Thread 0x7fffcafce640 (LWP 577308)]
[New Thread 0x7fffe899d640 (LWP 577309)]
[Thread 0x7fffcafce640 (LWP 577308) exited]
[Thread 0x7fffcbfff640 (LWP 577307) exited]
[New Thread 0x7fffcbfff640 (LWP 577310)]
[New Thread 0x7fffcafce640 (LWP 577311)]
[Thread 0x7fffcbfff640 (LWP 577310) exited]
[Thread 0x7fffe899d640 (LWP 577309) exited]
[Thread 0x7fffcafce640 (LWP 577311) exited]
[New Thread 0x7fffcafce640 (LWP 577312)]
[New Thread 0x7fffe899d640 (LWP 577313)]
[Thread 0x7fffcafce640 (LWP 577312) exited]
[New Thread 0x7fffcafce640 (LWP 577314)]
[New Thread 0x7fffcbfff640 (LWP 577315)]
[Thread 0x7fffcafce640 (LWP 577314) exited]
[Thread 0x7fffe899d640 (LWP 577313) exited]
[Thread 0x7fffcbfff640 (LWP 577315) exited]
[New Thread 0x7fffcbfff640 (LWP 577316)]
[New Thread 0x7fffe899d640 (LWP 577317)]
[Thread 0x7fffcbfff640 (LWP 577316) exited]
[Thread 0x7fffe899d640 (LWP 577317) exited]
[New Thread 0x7fffe899d640 (LWP 577318)]
[New Thread 0x7fffcbfff640 (LWP 577319)]
[Thread 0x7fffe899d640 (LWP 577318) exited]
[Thread 0x7fffcbfff640 (LWP 577319) exited]
[New Thread 0x7fffcbfff640 (LWP 577320)]
[New Thread 0x7fffe899d640 (LWP 577321)]
[New Thread 0x7fffcafce640 (LWP 577322)]
[New Thread 0x7fffcb7cf640 (LWP 577323)]
Found nothing along /home/gianluca/.config/ardour6/templates:/usr/share/ardour6/templates
[New Thread 0x7fffca5d4640 (LWP 577324)]
[New Thread 0x7fffca5d4640 (LWP 577325)]
[Thread 0x7fffca5d4640 (LWP 577324) exited]
[New Thread 0x7fffc9dd3640 (LWP 577326)]
[New Thread 0x7fffc95d2640 (LWP 577327)]
[Thread 0x7fffca5d4640 (LWP 577325) exited]
[Thread 0x7fffc9dd3640 (LWP 577326) exited]
[Thread 0x7fffc95d2640 (LWP 577327) exited]
[New Thread 0x7fffc95d2640 (LWP 577328)]
[Thread 0x7fffe9214640 (LWP 577283) exited]
[Thread 0x7fffcafce640 (LWP 577322) exited]
[New Thread 0x7fffcafce640 (LWP 577559)]
[New Thread 0x7fffc9dd3640 (LWP 577560)]
[New Thread 0x7fffca5d4640 (LWP 577561)]
[Thread 0x7fffc9dd3640 (LWP 577560) exited]
[Thread 0x7fffca5d4640 (LWP 577561) exited]
[Thread 0x7fffcb7cf640 (LWP 577323) exited]
[New Thread 0x7fffcb7cf640 (LWP 577707)]
[Thread 0x7fffcb7cf640 (LWP 577707) exited]
[Detaching after vfork from child process 577868]
[New Thread 0x7fffcb7cf640 (LWP 577869)]
[New Thread 0x7fffc8d6ca00 (LWP 577870)]
[New Thread 0x7fffca5d4640 (LWP 577871)]
Scanning folders for bundled LV2s: /usr/lib/ardour6/LV2
[New Thread 0x7fffc9dd3640 (LWP 577872)]
[New Thread 0x7fffc8c78640 (LWP 577902)]
[New Thread 0x7fff9bfff640 (LWP 577903)]
[Thread 0x7fffc8c78640 (LWP 577902) exited]
[Thread 0x7fff9bfff640 (LWP 577903) exited]
[Detaching after vfork from child process 577904]
[New Thread 0x7fff9bfff640 (LWP 577905)]
[Thread 0x7fff9bfff640 (LWP 577905) exited]
[Thread 0x7fffc9dd3640 (LWP 577872) exited]
[Detaching after vfork from child process 577984]
[New Thread 0x7fff9bfff640 (LWP 577985)]
[Thread 0x7fff9bfff640 (LWP 577985) exited]
Set cursor set to default
[New Thread 0x7fff9bfff640 (LWP 577986)]
[New Thread 0x7fffc9dd3640 (LWP 577987)]
[Thread 0x7fff9bfff640 (LWP 577986) exited]
[New Thread 0x7fff9bfff640 (LWP 577988)]
[New Thread 0x7fffc8c78640 (LWP 577989)]
[Thread 0x7fffc9dd3640 (LWP 577987) exited]
[Thread 0x7fff9bfff640 (LWP 577988) exited]
[Thread 0x7fffc8c78640 (LWP 577989) exited]
[New Thread 0x7fffc8c78640 (LWP 577991)]
[New Thread 0x7fff9bfff640 (LWP 577992)]
[Thread 0x7fffc8c78640 (LWP 577991) exited]
[Thread 0x7fff9bfff640 (LWP 577992) exited]
[New Thread 0x7fff9bfff640 (LWP 577993)]
[New Thread 0x7fffc8c78640 (LWP 577994)]
[Thread 0x7fff9bfff640 (LWP 577993) exited]
[New Thread 0x7fff9bfff640 (LWP 577995)]
[New Thread 0x7fffc9dd3640 (LWP 577996)]
[Thread 0x7fff9bfff640 (LWP 577995) exited]
[Thread 0x7fffc8c78640 (LWP 577994) exited]
[Thread 0x7fffc9dd3640 (LWP 577996) exited]
[New Thread 0x7fffc9dd3640 (LWP 577997)]
[New Thread 0x7fff9bfff640 (LWP 577998)]
[Thread 0x7fffc9dd3640 (LWP 577997) exited]
[New Thread 0x7fffc9dd3640 (LWP 577999)]
[New Thread 0x7fffc8c78640 (LWP 578000)]
[Thread 0x7fffc9dd3640 (LWP 577999) exited]
[Thread 0x7fffc8c78640 (LWP 578000) exited]
[Thread 0x7fff9bfff640 (LWP 577998) exited]
[New Thread 0x7fffc8c78640 (LWP 578001)]
[New Thread 0x7fff9bfff640 (LWP 578002)]
[Thread 0x7fffc8c78640 (LWP 578001) exited]
[Thread 0x7fff9bfff640 (LWP 578002) exited]
[New Thread 0x7fffc8077a00 (LWP 578003)]
[New Thread 0x7fffc806ba00 (LWP 578004)]
[New Thread 0x7fffc805fa00 (LWP 578005)]
[New Thread 0x7fffc8053a00 (LWP 578006)]
[New Thread 0x7fffc8047a00 (LWP 578007)]
[New Thread 0x7fff9b7fda00 (LWP 578008)]
[New Thread 0x7fff9b779a00 (LWP 578009)]
[New Thread 0x7fff9b6f5a00 (LWP 578010)]
[New Thread 0x7fff9b671a00 (LWP 578011)]
[New Thread 0x7fff9b5eda00 (LWP 578012)]
[New Thread 0x7fff9bfff640 (LWP 578013)]
[New Thread 0x7fff9bfff640 (LWP 578014)]
[Thread 0x7fff9bfff640 (LWP 578013) exited]
[New Thread 0x7fffc8c78640 (LWP 578015)]
[New Thread 0x7fffc9dd3640 (LWP 578016)]
[Thread 0x7fffc8c78640 (LWP 578015) exited]
[Thread 0x7fff9bfff640 (LWP 578014) exited]
[New Thread 0x7fff9bfff640 (LWP 578017)]
[New Thread 0x7fffc8c78640 (LWP 578018)]
[Thread 0x7fffc9dd3640 (LWP 578016) exited]
[Thread 0x7fff9bfff640 (LWP 578017) exited]
[Thread 0x7fffc8c78640 (LWP 578018) exited]
[New Thread 0x7fffc8c78640 (LWP 578019)]
[New Thread 0x7fff9bfff640 (LWP 578020)]
[Thread 0x7fffc8c78640 (LWP 578019) exited]
[Thread 0x7fff9bfff640 (LWP 578020) exited]
[New Thread 0x7fff9a738640 (LWP 578022)]
[New Thread 0x7fff9bfff640 (LWP 578023)]
[New Thread 0x7fffc8c78640 (LWP 578024)]
[New Thread 0x7fffc9dd3640 (LWP 578025)]
[New Thread 0x7fff989fb640 (LWP 578026)]
[New Thread 0x7fff63fff640 (LWP 578028)]
[New Thread 0x7fff637fe640 (LWP 578029)]
[Thread 0x7fff63fff640 (LWP 578028) exited]
[Thread 0x7fff637fe640 (LWP 578029) exited]
[New Thread 0x7fff637fe640 (LWP 578032)]
[New Thread 0x7fff63fff640 (LWP 578033)]
[Thread 0x7fff637fe640 (LWP 578032) exited]
[Thread 0x7fff63fff640 (LWP 578033) exited]
[New Thread 0x7fff63fff640 (LWP 578034)]
[New Thread 0x7fff637fe640 (LWP 578035)]
[Thread 0x7fff63fff640 (LWP 578034) exited]
[New Thread 0x7fff63fff640 (LWP 578036)]
[New Thread 0x7fff62ffd640 (LWP 578037)]
[Thread 0x7fff637fe640 (LWP 578035) exited]
[Thread 0x7fff63fff640 (LWP 578036) exited]
[New Thread 0x7fff63fff640 (LWP 578038)]
[New Thread 0x7fff637fe640 (LWP 578039)]
[Thread 0x7fff63fff640 (LWP 578038) exited]
[Thread 0x7fff62ffd640 (LWP 578037) exited]
[New Thread 0x7fff62ffd640 (LWP 578040)]
[New Thread 0x7fff63fff640 (LWP 578041)]
[Thread 0x7fff62ffd640 (LWP 578040) exited]
[Thread 0x7fff63fff640 (LWP 578041) exited]
[Thread 0x7fff637fe640 (LWP 578039) exited]
[New Thread 0x7fff637fe640 (LWP 578042)]
[New Thread 0x7fff63fff640 (LWP 578043)]
[Thread 0x7fff637fe640 (LWP 578042) exited]
[New Thread 0x7fff637fe640 (LWP 578044)]
[New Thread 0x7fff62ffd640 (LWP 578045)]
[Thread 0x7fff637fe640 (LWP 578044) exited]
[Thread 0x7fff63fff640 (LWP 578043) exited]
[Thread 0x7fff62ffd640 (LWP 578045) exited]
[New Thread 0x7fff62ffd640 (LWP 578198)]
[New Thread 0x7fff63fff640 (LWP 578199)]
[Thread 0x7fff62ffd640 (LWP 578198) exited]
[Thread 0x7fff63fff640 (LWP 578199) exited]
Reading player:ZynAddSubFX took 1 microseconds, final size = 0
[New Thread 0x7fff63fff640 (LWP 578672)]
lo server running on 11768
[New Thread 0x7fff62ffd640 (LWP 578673)]
[New Thread 0x7fff637fe640 (LWP 578674)]
[New Thread 0x7fff6092f640 (LWP 578675)]
[Thread 0x7fff637fe640 (LWP 578674) exited]
[New Thread 0x7fff637fe640 (LWP 578676)]
[New Thread 0x7fff53fff640 (LWP 578677)]
[Thread 0x7fff6092f640 (LWP 578675) exited]
[Thread 0x7fff637fe640 (LWP 578676) exited]
[Thread 0x7fff53fff640 (LWP 578677) exited]
[INFO] Opened the zynaddsubfx UI…
[INFO] Ready to run
[INFO:Zyn] zest_open()
[INFO:Zyn] zest_open(osc.udp://127.0.0.1:11768)
[INFO:Zyn] Found Assets at /usr/lib/zynaddsubfx/
[INFO:Zyn] Starting Zyn-Fusion
[INFO:Zyn] Thanks for supporting the development of this project
[INFO:Zyn] Creating MRuby Interpreter…
[debug] parsing json file
[debug] json parsed succesfully

Thread 85 “RT-4-(nil)” received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0x7fff9b5eda00 (LWP 578012)]
0x00007ffff5e268d7 in ?? () from /usr/lib/liblilv-0.so.0
(gdb) quit

And this is the log when trying to open Zyn VST (and it crashed)

For help, type “help”.
Type “apropos word” to search for commands related to “word”…
Reading symbols from /usr/lib/ardour6/ardour-6.9.0…
(No debugging symbols found in /usr/lib/ardour6/ardour-6.9.0)
(gdb) run
Starting program: /usr/lib/ardour6/ardour-6.9.0
[Thread debugging using libthread_db enabled]
Using host libthread_db library “/usr/lib/libthread_db.so.1”.
Ardour6.9.0 (built using 6.9 and GCC version 11.2.0)
Ardour: [INFO]: Your system is configured to limit Ardour to 524288 open files
Ardour: [INFO]: Loading system configuration file /etc/ardour6/system_config
Ardour: [INFO]: Loading user configuration file /home/gianluca/.config/ardour6/config
[New Thread 0x7ffff0bb3640 (LWP 600737)]
Ardour: [INFO]: CPU vendor: AuthenticAMD
Ardour: [INFO]: AVX-capable processor
Ardour: [INFO]: AVX with FMA capable processor
Ardour: [INFO]: CPU brand: AMD Ryzen 5 3500X 6-Core Processor
Ardour: [INFO]: Using AVX and FMA optimized routines
[New Thread 0x7fffebfff640 (LWP 600738)]
[New Thread 0x7fffeb7fe640 (LWP 600739)]
[New Thread 0x7fffeaffd640 (LWP 600740)]
Ardour: [INFO]: Loading plugin meta data file /usr/share/ardour6/plugin_metadata/plugin_tags
Ardour: [INFO]: Loading plugin statistics file /home/gianluca/.config/ardour6/plugin_metadata/plugin_stats
[New Thread 0x7fffea69d640 (LWP 600741)]
[Thread 0x7fffea69d640 (LWP 600741) exited]
[New Thread 0x7fffea69d640 (LWP 600742)]
[New Thread 0x7fffe9b48640 (LWP 600743)]
[New Thread 0x7fffe9214640 (LWP 600744)]
Ardour: [INFO]: Loading default ui configuration file /etc/ardour6/default_ui_config
Ardour: [INFO]: Loading 452 MIDI patches from /usr/share/ardour6/patchfiles
Ardour: [INFO]: Loading user ui configuration file /home/gianluca/.config/ardour6/ui_config
[New Thread 0x7fffe899d640 (LWP 600745)]
[Thread 0x7fffe899d640 (LWP 600745) exited]
[New Thread 0x7fffe899d640 (LWP 600746)]
[New Thread 0x7fffcbfff640 (LWP 600747)]
[Thread 0x7fffe899d640 (LWP 600746) exited]
[New Thread 0x7fffe899d640 (LWP 600748)]
[New Thread 0x7fffcb7fe640 (LWP 600749)]
[Thread 0x7fffcbfff640 (LWP 600747) exited]
[New Thread 0x7fffcb7fe640 (LWP 600750)]
[Thread 0x7fffcb7fe640 (LWP 600749) exited]
[Thread 0x7fffe899d640 (LWP 600748) exited]
[New Thread 0x7fffe899d640 (LWP 600751)]
[Thread 0x7fffcb7fe640 (LWP 600750) exited]
[Thread 0x7fffe899d640 (LWP 600751) exited]
Ardour: [INFO]: Loading color file /usr/share/ardour6/themes/dark-ardour.colors
Ardour: [INFO]: Loading ui configuration file /etc/ardour6/clearlooks.rc
[New Thread 0x7fffe899d640 (LWP 600752)]
[New Thread 0x7fffcb7fe640 (LWP 600753)]
[Thread 0x7fffe899d640 (LWP 600752) exited]
[New Thread 0x7fffe899d640 (LWP 600754)]
[New Thread 0x7fffcbfff640 (LWP 600755)]
[Thread 0x7fffe899d640 (LWP 600754) exited]
[New Thread 0x7fffe899d640 (LWP 600756)]
[Thread 0x7fffcb7fe640 (LWP 600753) exited]
[New Thread 0x7fffcb7fe640 (LWP 600757)]
[Thread 0x7fffcbfff640 (LWP 600755) exited]
[Thread 0x7fffe899d640 (LWP 600756) exited]
[New Thread 0x7fffe899d640 (LWP 600758)]
[New Thread 0x7fffcbfff640 (LWP 600759)]
[Thread 0x7fffe899d640 (LWP 600758) exited]
[Thread 0x7fffcb7fe640 (LWP 600757) exited]
[Thread 0x7fffcbfff640 (LWP 600759) exited]
Ardour: [INFO]: Loading bindings from /etc/ardour6/ardour.keys
Loading ui configuration file /etc/ardour6/clearlooks.rc
[New Thread 0x7fffcbfff640 (LWP 600760)]
[New Thread 0x7fffcb7fe640 (LWP 600761)]
[Thread 0x7fffcbfff640 (LWP 600760) exited]
[New Thread 0x7fffcbfff640 (LWP 600762)]
[New Thread 0x7fffe899d640 (LWP 600763)]
[Thread 0x7fffcbfff640 (LWP 600762) exited]
[Thread 0x7fffcb7fe640 (LWP 600761) exited]
[New Thread 0x7fffcb7fe640 (LWP 600764)]
[New Thread 0x7fffcbfff640 (LWP 600765)]
[Thread 0x7fffcb7fe640 (LWP 600764) exited]
[Thread 0x7fffcbfff640 (LWP 600765) exited]
[Thread 0x7fffe899d640 (LWP 600763) exited]
[New Thread 0x7fffe899d640 (LWP 600794)]
[New Thread 0x7fffcbfff640 (LWP 600795)]
[Thread 0x7fffe899d640 (LWP 600794) exited]
[New Thread 0x7fffe899d640 (LWP 600798)]
[New Thread 0x7fffcb7fe640 (LWP 600800)]
[Thread 0x7fffcbfff640 (LWP 600795) exited]
[Thread 0x7fffe899d640 (LWP 600798) exited]
[Thread 0x7fffcb7fe640 (LWP 600800) exited]
[New Thread 0x7fffcb7fe640 (LWP 600803)]
[New Thread 0x7fffe899d640 (LWP 600804)]
[Thread 0x7fffcb7fe640 (LWP 600803) exited]
[Thread 0x7fffe899d640 (LWP 600804) exited]
[New Thread 0x7fffe899d640 (LWP 600807)]
[New Thread 0x7fffcb7fe640 (LWP 600808)]
[Thread 0x7fffe899d640 (LWP 600807) exited]
[Thread 0x7fffcb7fe640 (LWP 600808) exited]
[New Thread 0x7fffcb7fe640 (LWP 600841)]
[New Thread 0x7fffe899d640 (LWP 600842)]
[New Thread 0x7fffcbfff640 (LWP 600844)]
[New Thread 0x7fffcadd3640 (LWP 600845)]
[New Thread 0x7fffca5d2640 (LWP 600846)]
Found nothing along /home/gianluca/.config/ardour6/templates:/usr/share/ardour6/templates
[New Thread 0x7fffc9dd1640 (LWP 600847)]
[New Thread 0x7fffc95d0640 (LWP 600848)]
[Thread 0x7fffc9dd1640 (LWP 600847) exited]
[New Thread 0x7fffc9dd1640 (LWP 600849)]
[New Thread 0x7fffc8dcf640 (LWP 600850)]
[Thread 0x7fffc95d0640 (LWP 600848) exited]
[Thread 0x7fffc9dd1640 (LWP 600849) exited]
[Thread 0x7fffc8dcf640 (LWP 600850) exited]
[New Thread 0x7fffc8dcf640 (LWP 600858)]
[Thread 0x7fffe9214640 (LWP 600744) exited]
[Thread 0x7fffcbfff640 (LWP 600844) exited]
[Thread 0x7fffcadd3640 (LWP 600845) exited]
[New Thread 0x7fffcadd3640 (LWP 600937)]
[New Thread 0x7fffcbfff640 (LWP 600938)]
[New Thread 0x7fffc9dd1640 (LWP 600939)]
[Thread 0x7fffcbfff640 (LWP 600938) exited]
[Thread 0x7fffc9dd1640 (LWP 600939) exited]
[Thread 0x7fffca5d2640 (LWP 600846) exited]
[New Thread 0x7fffca5d2640 (LWP 601247)]
[Thread 0x7fffca5d2640 (LWP 601247) exited]
[Detaching after vfork from child process 601422]
[New Thread 0x7fffca5d2640 (LWP 601427)]
[New Thread 0x7fffc856ba00 (LWP 601477)]
[New Thread 0x7fffc9dd1640 (LWP 601478)]
Scanning folders for bundled LV2s: /usr/lib/ardour6/LV2
[New Thread 0x7fffcbfff640 (LWP 601479)]
[New Thread 0x7fffc95d0640 (LWP 601481)]
[New Thread 0x7fff9bfff640 (LWP 601482)]
[Thread 0x7fffc95d0640 (LWP 601481) exited]
[Thread 0x7fff9bfff640 (LWP 601482) exited]
[Detaching after vfork from child process 601483]
[New Thread 0x7fff9bfff640 (LWP 601484)]
[Thread 0x7fff9bfff640 (LWP 601484) exited]
[Thread 0x7fffcadd3640 (LWP 600937) exited]
[Detaching after vfork from child process 601485]
[New Thread 0x7fff9bfff640 (LWP 601486)]
[Thread 0x7fff9bfff640 (LWP 601486) exited]
Set cursor set to default
[New Thread 0x7fff9bfff640 (LWP 601563)]
[New Thread 0x7fffcadd3640 (LWP 601564)]
[Thread 0x7fff9bfff640 (LWP 601563) exited]
[New Thread 0x7fff9bfff640 (LWP 601565)]
[New Thread 0x7fffc95d0640 (LWP 601566)]
[Thread 0x7fff9bfff640 (LWP 601565) exited]
[Thread 0x7fffcadd3640 (LWP 601564) exited]
[Thread 0x7fffc95d0640 (LWP 601566) exited]
[New Thread 0x7fffc95d0640 (LWP 601567)]
[New Thread 0x7fffcadd3640 (LWP 601568)]
[Thread 0x7fffc95d0640 (LWP 601567) exited]
[Thread 0x7fffcadd3640 (LWP 601568) exited]
[New Thread 0x7fffcadd3640 (LWP 601569)]
[New Thread 0x7fffc95d0640 (LWP 601570)]
[Thread 0x7fffcadd3640 (LWP 601569) exited]
[New Thread 0x7fffcadd3640 (LWP 601571)]
[New Thread 0x7fff9bfff640 (LWP 601572)]
[Thread 0x7fffc95d0640 (LWP 601570) exited]
[Thread 0x7fffcadd3640 (LWP 601571) exited]
[Thread 0x7fff9bfff640 (LWP 601572) exited]
[New Thread 0x7fff9bfff640 (LWP 601573)]
[New Thread 0x7fffcadd3640 (LWP 601574)]
[Thread 0x7fff9bfff640 (LWP 601573) exited]
[New Thread 0x7fff9bfff640 (LWP 601575)]
[New Thread 0x7fffc95d0640 (LWP 601576)]
[Thread 0x7fffcadd3640 (LWP 601574) exited]
[Thread 0x7fff9bfff640 (LWP 601575) exited]
[New Thread 0x7fff9bfff640 (LWP 601577)]
[Thread 0x7fffc95d0640 (LWP 601576) exited]
[New Thread 0x7fffc95d0640 (LWP 601578)]
[Thread 0x7fff9bfff640 (LWP 601577) exited]
[Thread 0x7fffc95d0640 (LWP 601578) exited]
[New Thread 0x7fffc8077a00 (LWP 601579)]
[New Thread 0x7fffc806ba00 (LWP 601580)]
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[New Thread 0x7fff9bfff640 (LWP 601590)]
[Thread 0x7fffc95d0640 (LWP 601589) exited]
[New Thread 0x7fffc95d0640 (LWP 601591)]
[New Thread 0x7fffcadd3640 (LWP 601592)]
[Thread 0x7fffc95d0640 (LWP 601591) exited]
[Thread 0x7fff9bfff640 (LWP 601590) exited]
[Thread 0x7fffcadd3640 (LWP 601592) exited]
[New Thread 0x7fffcadd3640 (LWP 601593)]
[New Thread 0x7fff9bfff640 (LWP 601594)]
[Thread 0x7fffcadd3640 (LWP 601593) exited]
[New Thread 0x7fffcadd3640 (LWP 601595)]
[New Thread 0x7fffc95d0640 (LWP 601596)]
[Thread 0x7fffcadd3640 (LWP 601595) exited]
[Thread 0x7fff9bfff640 (LWP 601594) exited]
[Thread 0x7fffc95d0640 (LWP 601596) exited]
[New Thread 0x7fff9a738640 (LWP 601598)]
[New Thread 0x7fffc95d0640 (LWP 601599)]
[New Thread 0x7fff9bfff640 (LWP 601600)]
[New Thread 0x7fffcadd3640 (LWP 601601)]
[New Thread 0x7fff989fb640 (LWP 601602)]
[New Thread 0x7fff63fff640 (LWP 601603)]
[New Thread 0x7fff637fe640 (LWP 601604)]
[Thread 0x7fff63fff640 (LWP 601603) exited]
[Thread 0x7fff637fe640 (LWP 601604) exited]
[New Thread 0x7fff637fe640 (LWP 601607)]
[New Thread 0x7fff63fff640 (LWP 601608)]
[Thread 0x7fff637fe640 (LWP 601607) exited]
[Thread 0x7fff63fff640 (LWP 601608) exited]
[New Thread 0x7fff63fff640 (LWP 601610)]
[New Thread 0x7fff637fe640 (LWP 601611)]
[Thread 0x7fff63fff640 (LWP 601610) exited]
[Thread 0x7fff637fe640 (LWP 601611) exited]
[New Thread 0x7fff637fe640 (LWP 601612)]
[New Thread 0x7fff63fff640 (LWP 601613)]
[Thread 0x7fff637fe640 (LWP 601612) exited]
[New Thread 0x7fff637fe640 (LWP 601614)]
[New Thread 0x7fff62ffd640 (LWP 601615)]
[Thread 0x7fff637fe640 (LWP 601614) exited]
[Thread 0x7fff63fff640 (LWP 601613) exited]
[Thread 0x7fff62ffd640 (LWP 601615) exited]
[New Thread 0x7fff62ffd640 (LWP 601616)]
[New Thread 0x7fff63fff640 (LWP 601617)]
[Thread 0x7fff62ffd640 (LWP 601616) exited]
[Thread 0x7fff63fff640 (LWP 601617) exited]
[New Thread 0x7fff63fff640 (LWP 601618)]
[New Thread 0x7fff62ffd640 (LWP 601619)]
[Thread 0x7fff63fff640 (LWP 601618) exited]
[New Thread 0x7fff63fff640 (LWP 601620)]
[New Thread 0x7fff637fe640 (LWP 601621)]
[Thread 0x7fff63fff640 (LWP 601620) exited]
[Thread 0x7fff62ffd640 (LWP 601619) exited]
[Thread 0x7fff637fe640 (LWP 601621) exited]
[New Thread 0x7fff637fe640 (LWP 601782)]
[New Thread 0x7fff62ffd640 (LWP 601783)]
[Thread 0x7fff637fe640 (LWP 601782) exited]
[Thread 0x7fff62ffd640 (LWP 601783) exited]
Reading player:ZynAddSubFX took 1 microseconds, final size = 0
lo server running on 12104
[New Thread 0x7fff62ffd640 (LWP 602165)]
lo server running on 17210
[New Thread 0x7fff637fe640 (LWP 602166)]
[New Thread 0x7fff63fff640 (LWP 602167)]
[New Thread 0x7fff63fff640 (LWP 602168)]
[Thread 0x7fff63fff640 (LWP 602167) exited]
[New Thread 0x7fff535fe640 (LWP 602169)]
[New Thread 0x7fff52dfd640 (LWP 602170)]
[Thread 0x7fff63fff640 (LWP 602168) exited]
[Thread 0x7fff535fe640 (LWP 602169) exited]
[Thread 0x7fff52dfd640 (LWP 602170) exited]
[INFO] Opened the zynaddsubfx UI…
[INFO] Ready to run
[Thread 0x7fff637fe640 (LWP 602166) exited]
[New Thread 0x7fff637fe640 (LWP 602247)]
[INFO:Zyn] zest_open()
[INFO:Zyn] zest_open(osc.udp://127.0.0.1:17210)
[INFO:Zyn] Found Assets at /usr/lib/zynaddsubfx/
[INFO:Zyn] Starting Zyn-Fusion
[INFO:Zyn] Thanks for supporting the development of this project
[INFO:Zyn] Creating MRuby Interpreter…
[debug] parsing json file
[debug] json parsed succesfully
[Thread 0x7fff62ffd640 (LWP 602165) exited]
[Thread 0x7fff989fb640 (LWP 601602) exited]
[Thread 0x7fffcadd3640 (LWP 601601) exited]
[Thread 0x7fff9bfff640 (LWP 601600) exited]
[Thread 0x7fffc95d0640 (LWP 601599) exited]
[Thread 0x7fff9a738640 (LWP 601598) exited]
[Thread 0x7fff9b5eda00 (LWP 601588) exited]
[Thread 0x7fff9b671a00 (LWP 601587) exited]
[Thread 0x7fff9b6f5a00 (LWP 601586) exited]
[Thread 0x7fff9b779a00 (LWP 601585) exited]
[Thread 0x7fff9b7fda00 (LWP 601584) exited]
[Thread 0x7fffc8047a00 (LWP 601583) exited]
[Thread 0x7fffc8053a00 (LWP 601582) exited]
[Thread 0x7fffc805fa00 (LWP 601581) exited]
[Thread 0x7fffc806ba00 (LWP 601580) exited]
[Thread 0x7fffc8077a00 (LWP 601579) exited]
[Thread 0x7fffcbfff640 (LWP 601479) exited]
[Thread 0x7fffc9dd1640 (LWP 601478) exited]
[Thread 0x7fffc856ba00 (LWP 601477) exited]
[Thread 0x7fffca5d2640 (LWP 601427) exited]
[Thread 0x7fffc8dcf640 (LWP 600858) exited]
[Thread 0x7fffe899d640 (LWP 600842) exited]
[Thread 0x7fffcb7fe640 (LWP 600841) exited]
[Thread 0x7fffe9b48640 (LWP 600743) exited]
[Thread 0x7fffea69d640 (LWP 600742) exited]
[Thread 0x7fffeaffd640 (LWP 600740) exited]
[Thread 0x7fffeb7fe640 (LWP 600739) exited]
[Thread 0x7fffebfff640 (LWP 600738) exited]
[Thread 0x7ffff1068a00 (LWP 600733) exited]
[Thread 0x7fff637fe640 (LWP 602247) exited]
[Thread 0x7ffff0bb3640 (LWP 600737) exited]
[New process 600733]
[Inferior 1 (process 600733) exited normally]
(gdb) watched PID no longer exists - releasing device.

Glad you are up and running with Ardour, in my humble opinion the best DAW there is. I have experienced similar plugin problems and also with ZynAddSubFX as a plugin. Do you have the standalone version installed, there is a small chance that it needs to be installed in order for the plugin to work. Whilst you wait for the kinks to be ironed out in your chosen distro you can use the standalone version as “outboard” gear using Jack. Jack 1 comes with midi capabilities built in but if you use Jack 2 you have to also install a2jmidid, (run in terminal “a2jmidid -e” if i remember correctly to get the midi capability for Jack 2). I’m itching to play with Vital but I need a system upgrade before that can happen, I got Zynad to work by finding an earlier version to install and it sure is a powerhouse.

Yes, I’m excited to get to play around with Ardour, I installed the standalone to see if it solved anything but unfortunately no.
I tried to install the standalone ZynAddSubFx but I couldn’t figure out how after downloading it (I am a linux noob).
I installed a2jmidid and tried running “a2jmidid -e” but got an error…
This is the log when running it with gdb:
Reading symbols from a2jmidid…
(No debugging symbols found in a2jmidid)
(gdb) run
Starting program: /usr/bin/a2jmidid
[Thread debugging using libthread_db enabled]
Using host libthread_db library “/usr/lib/libthread_db.so.1”.
JACK MIDI <-> ALSA sequencer MIDI bridge, version 9 built on Sun Nov 29 23:19:07 2020
Copyright 2006,2007 Dmitry S. Baikov
Copyright 2007,2008,2009,2011,2012 Nedko Arnaudov

Bridge starting…
Using JACK server ‘default’
Hardware ports will not be exported.
[New Thread 0x7ffff718e640 (LWP 352393)]
Cannot connect to server socket err = No such file or directory
Cannot connect to server request channel
jack server is not running or cannot be started
[Thread 0x7ffff718e640 (LWP 352393) exited]
JackShmReadWritePtr::~JackShmReadWritePtr - Init not done for -1, skipping unlock
JackShmReadWritePtr::~JackShmReadWritePtr - Init not done for -1, skipping unlock
ERROR: a2j_jack_client_create: Cannot create jack client
ERROR: a2j_start: a2j_new() failed.
[Inferior 1 (process 352390) exited normally]

Do you have any idea what this could mean and how to solve it?

Thanks for the tips, maybe this is getting me to find what’s the crux of the issue

Edit: I managed to solve the issue with ajmidi by setting the interface to hw1 using QjackCtl. However I still get a crash with Zyn… The problem seems to be a conflict with Jack, as I get the following line:

Jack reports error: Cannot delete key Metadata: event-types | JACK Audio Connection Kit (BDB0073 DB_NOTFOUND: No matching key/data pair found)

It was never strictly required, just that MIDI timing performance with JACK v2 (which confusingly refers to versions 1.x.x) was not as good as with JACK v1. The current jackd maintainer says that was corrected in version 1.9.13, so any of the recent versions should run as well as JACK v1 without needing the external bridge.