View Issue Details
| ID | Project | Category | View Status | Date Submitted | Last Update |
|---|---|---|---|---|---|
| 0010133 | ardour | bugs | public | 2026-01-21 20:00 | 2026-01-22 23:20 |
| Reporter | sojuzstudio | Assigned To | |||
| Priority | normal | Severity | crash | Reproducibility | random |
| Status | new | Resolution | open | ||
| Platform | Ubuntu | OS | Linux | OS Version | (any) |
| Product Version | Mixbus 11.x | ||||
| Summary | 0010133: Crash when creating new session | ||||
| Description | Mixbus crashes when I create a new empty session while using the ALSA backend. I tried creating a session using the Pipewire/Jack option, and the creation succeeded. I also tried it with Mixbus 10, and the problem doesn’t occur there. It also doesn’t happen in Ardour 8.12.0. | ||||
| Steps To Reproduce | Steps to Reproduce Open Mixbus (or Ardour) with the ALSA backend selected. Create a new empty session. Observe that Mixbus crashes immediately upon session creation. Notes / Additional Info: Creating a session with the Pipewire/Jack backend works correctly. Using Mixbus 10 does not produce the crash. Using Ardour 8.12.0 does not produce the crash. | ||||
| Tags | alsa | ||||
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I do this all the time with Mixbus and Ardour/git (rc2), so there must be something specific to your system. Could you get a backtrace of the crash with Ardour nightly debug build (demo is fine) from https://nightly.ardour.org see https://ardour.org/debugging_ardour Thanks in advance. |
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PS. does re/moving preferences helpmv ~/.config/ardour9 ~/.config/ardour9.bak or mv ~/.config/mixbus11 ~/.config/mixbus11.bak |
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This is on Ubuntu Studio 25.10. I wasn’t able to debug it, but when I run it from the command line, it looks like this. sojuzstudio@sojuzstudio-System-Product-Name:/opt/Mixbus-11.2.27/bin$ ./mixbus11 Mixbus11.2.27 (built using 11.2-27-g30ded6ecf6 and GCC version 10.2.1 20210110) Mixbus: [INFO]: Your system is configured to limit Mixbus to 524288 open files Mixbus: [INFO]: Loading system configuration file /opt/Mixbus-11.2.27/etc/system_config Mixbus: [INFO]: Loading user configuration file /home/sojuzstudio/.config/mixbus11/config Mixbus: [INFO]: CPU vendor: GenuineIntel Mixbus: [INFO]: AVX capable processor Mixbus: [INFO]: AVX with FMA capable processor Mixbus: [INFO]: CPU brand: Intel(R) Core(TM) i9-9900K CPU @ 3.60GHz Mixbus: [INFO]: Using AVX and FMA optimized routines Mixbus: [INFO]: Loading plugin meta data file /opt/Mixbus-11.2.27/share/plugin_metadata/plugin_tags Mixbus: [INFO]: add_lrdf_data '/home/sojuzstudio/.config/mixbus11/rdf:/opt/Mixbus-11.2.27/share/rdf:/usr/local/share/ladspa/rdf:/usr/share/ladspa/rdf' Mixbus: [INFO]: read rdf_file 'file:///opt/Mixbus-11.2.27/share/rdf/ardour-presets.n3' Mixbus: [INFO]: read rdf_file 'file:///usr/share/ladspa/rdf/tap_reverb.rdf' Mixbus: [INFO]: read rdf_file 'file:///usr/share/ladspa/rdf/ladspa.rdfs' Mixbus: [INFO]: read rdf_file 'file:///usr/share/ladspa/rdf/blop.rdf' Mixbus: [INFO]: read rdf_file 'file:///usr/share/ladspa/rdf/caps.rdf' Mixbus: [INFO]: read rdf_file 'file:///usr/share/ladspa/rdf/swh-scales.rdf' Mixbus: [INFO]: read rdf_file 'file:///usr/share/ladspa/rdf/ladspa-rubberband.rdf' Mixbus: [INFO]: read rdf_file 'file:///usr/share/ladspa/rdf/swh-aux.rdf' Mixbus: [INFO]: read rdf_file 'file:///usr/share/ladspa/rdf/tap-plugins.rdf' Mixbus: [INFO]: read rdf_file 'file:///usr/share/ladspa/rdf/swh-plugins.rdf' Cannot install SIGPIPE error handler Mixbus: [INFO]: Loading default ui configuration file /opt/Mixbus-11.2.27/etc/default_ui_config Mixbus: [INFO]: Loading user ui configuration file /home/sojuzstudio/.config/mixbus11/ui_config Mixbus: [INFO]: Loading 468 MIDI patches from /opt/Mixbus-11.2.27/share/patchfiles Mixbus: [INFO]: Loading color file /opt/Mixbus-11.2.27/share/themes/dark-mixbus.colors Mixbus: [INFO]: Loading ui configuration file /opt/Mixbus-11.2.27/etc/clearlooks.rc Mixbus: [INFO]: Loading bindings from /opt/Mixbus-11.2.27/etc/ardour.keys Loading ui configuration file /opt/Mixbus-11.2.27/etc/clearlooks.rc ardour-request-device: Failed to acquire device: 'Audio1' Device or resource busy (mixbus-11.2.27:7463): Gtk-WARNING **: 23:21:40.496: Theme directory places/128 of theme ubuntustudio-dark has no size field (mixbus-11.2.27:7463): Gtk-WARNING **: 23:21:40.497: Theme directory places/scalable of theme ubuntustudio-dark has no size field The program 'mixbus-11.2.27' received an X Window System error. This probably reflects a bug in the program. The error was 'BadWindow (invalid Window parameter)'. (Details: serial 3878 error_code 3 request_code 38 minor_code 0) (Note to programmers: normally, X errors are reported asynchronously; that is, you will receive the error a while after causing it. To debug your program, run it with the --sync command line option to change this behavior. You can then get a meaningful backtrace from your debugger if you break on the gdk_x_error() function.) sojuzstudio@sojuzstudio-System-Product-Name:/opt/Mixbus-11.2.27/bin$ ardour-request-device: watched PID no longer exists - releasing device. |
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I installed everything again. Ubuntu Studio 25.10 and the latest version of Mixbus available, version 11. I still have the same problem. Could this be related to the fact that Ubuntu now uses Wayland only? Below is the message that GDB (the GNU Debugger) gives. Starting program: /usr/bin/env LD_LIBRARY_PATH=/opt/Mixbus-11.2.27/lib /opt/Mixbus-11.2.27/bin/mixbus-11.2.27 [Thread debugging using libthread_db enabled] Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1". process 35459 is executing new program: /opt/Mixbus-11.2.27/bin/mixbus-11.2.27 [Thread debugging using libthread_db enabled] Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1". Downloading 114.24 K separate debug info for /lib/x86_64-linux-gnu/libXext.so.6 Downloading 23.80 K separate debug info for /lib/x86_64-linux-gnu/libXinerama.so.1 Downloading 74.91 K separate debug info for /lib/x86_64-linux-gnu/libXrandr.so.2 Mixbus11.2.27 (built using 11.2-27-g30ded6ecf6 and GCC version 10.2.1 20210110) [New Thread 0x7ffff36ce900 (LWP 35463)] Mixbus: [INFO]: Your system is configured to limit Mixbus to 524288 open files Mixbus: [INFO]: Loading system configuration file /opt/Mixbus-11.2.27/etc/system_config Mixbus: [INFO]: Loading user configuration file /home/sojuzstudio/.config/mixbus11/config [New Thread 0x7ffff35426c0 (LWP 35464)] Mixbus: [INFO]: CPU vendor: GenuineIntel Mixbus: [INFO]: AVX capable processor Mixbus: [INFO]: AVX with FMA capable processor Mixbus: [INFO]: CPU brand: Intel(R) Core(TM) i9-9900K CPU @ 3.60GHz Mixbus: [INFO]: Using AVX and FMA optimized routines [New Thread 0x7ffff2d416c0 (LWP 35465)] [New Thread 0x7ffff25406c0 (LWP 35466)] [New Thread 0x7ffff1d3f6c0 (LWP 35467)] Mixbus: [INFO]: Loading plugin meta data file /opt/Mixbus-11.2.27/share/plugin_metadata/plugin_tags Mixbus: [INFO]: Loading plugin statistics file /home/sojuzstudio/.config/mixbus11/plugin_metadata/plugin_stats Mixbus: [INFO]: add_lrdf_data '/home/sojuzstudio/.config/mixbus11/rdf:/opt/Mixbus-11.2.27/share/rdf:/usr/local/share/ladspa/rdf:/usr/share/ladspa/rdf' Mixbus: [INFO]: read rdf_file 'file:///opt/Mixbus-11.2.27/share/rdf/ardour-presets.n3' Mixbus: [INFO]: read rdf_file 'file:///usr/share/ladspa/rdf/swh-aux.rdf' Mixbus: [INFO]: read rdf_file 'file:///usr/share/ladspa/rdf/ladspa.rdfs' Mixbus: [INFO]: read rdf_file 'file:///usr/share/ladspa/rdf/ladspa-rubberband.rdf' Mixbus: [INFO]: read rdf_file 'file:///usr/share/ladspa/rdf/tap-plugins.rdf' Mixbus: [INFO]: read rdf_file 'file:///usr/share/ladspa/rdf/swh-plugins.rdf' Mixbus: [INFO]: read rdf_file 'file:///usr/share/ladspa/rdf/tap_reverb.rdf' Mixbus: [INFO]: read rdf_file 'file:///usr/share/ladspa/rdf/blop.rdf' Mixbus: [INFO]: read rdf_file 'file:///usr/share/ladspa/rdf/swh-scales.rdf' Mixbus: [INFO]: read rdf_file 'file:///usr/share/ladspa/rdf/caps.rdf' [New Thread 0x7ffff0ec16c0 (LWP 35468)] [Thread 0x7ffff0ec16c0 (LWP 35468) exited] [New Thread 0x7ffff0ec16c0 (LWP 35469)] [Thread 0x7ffff0ec16c0 (LWP 35469) exited] [New Thread 0x7ffff0ec16c0 (LWP 35470)] [New Thread 0x7fffdbfff6c0 (LWP 35471)] Downloading 30.70 K separate debug info for /lib/x86_64-linux-gnu/libasyncns.so.0 [New Thread 0x7fffdb2f16c0 (LWP 35472)] Cannot install SIGPIPE error handler Mixbus: [INFO]: Loading default ui configuration file /opt/Mixbus-11.2.27/etc/default_ui_config Mixbus: [INFO]: Loading user ui configuration file /home/sojuzstudio/.config/mixbus11/ui_config Mixbus: [INFO]: Loading 468 MIDI patches from /opt/Mixbus-11.2.27/share/patchfiles Downloading 134.12 K separate debug info for /lib/x86_64-linux-gnu/libXi.so Mixbus: [INFO]: Loading color file /opt/Mixbus-11.2.27/share/themes/dark-mixbus.colors Mixbus: [INFO]: Loading ui configuration file /opt/Mixbus-11.2.27/etc/clearlooks.rc Mixbus: [INFO]: Loading bindings from /opt/Mixbus-11.2.27/etc/ardour.keys Loading ui configuration file /opt/Mixbus-11.2.27/etc/clearlooks.rc [New Thread 0x7fffda9e0900 (LWP 35473)] [Thread 0x7fffda9e0900 (LWP 35473) exited] [Detaching after vfork from child process 35474] [New Thread 0x7fffda8e06c0 (LWP 35475)] [Detaching after vfork from child process 35476] [New Thread 0x7fffda0df6c0 (LWP 35477)] ardour-request-device: Failed to acquire device: 'Audio1' Device or resource busy [Thread 0x7fffda0df6c0 (LWP 35477) exited] [Thread 0x7fffda8e06c0 (LWP 35475) exited] [Thread 0x7fffdb2f16c0 (LWP 35472) exited] [New Thread 0x7fffda0df6c0 (LWP 35486)] (mixbus-11.2.27:35459): Gtk-WARNING **: 20:54:14.952: Theme directory places/128 of theme ubuntustudio-dark has no size field (mixbus-11.2.27:35459): Gtk-WARNING **: 20:54:14.953: Theme directory places/scalable of theme ubuntustudio-dark has no size field [New Thread 0x7fffda8e06c0 (LWP 35487)] [New Thread 0x7fffd934c6c0 (LWP 35488)] [New Thread 0x7fffd8b4b6c0 (LWP 35489)] [Thread 0x7fffda8e06c0 (LWP 35487) exited] [Thread 0x7fffd934c6c0 (LWP 35488) exited] [New Thread 0x7fffd934c6c0 (LWP 35490)] Downloading 39.97 K separate debug info for /lib/x86_64-linux-gnu/libXfixes.so.3 [Thread 0x7fffd8b4b6c0 (LWP 35489) exited] [Detaching after vfork from child process 35510] [New Thread 0x7fffd8b4b6c0 (LWP 35511)] [New Thread 0x7fffd833b900 (LWP 35512)] [New Thread 0x7fffd971c900 (LWP 35513)] The program 'mixbus-11.2.27' received an X Window System error. This probably reflects a bug in the program. The error was 'BadWindow (invalid Window parameter)'. (Details: serial 3236 error_code 3 request_code 38 minor_code 0) (Note to programmers: normally, X errors are reported asynchronously; that is, you will receive the error a while after causing it. To debug your program, run it with the --sync command line option to change this behavior. You can then get a meaningful backtrace from your debugger if you break on the gdk_x_error() function.) [Thread 0x7fffd971c900 (LWP 35513) exited] [Thread 0x7fffd833b900 (LWP 35512) exited] [Thread 0x7fffd8b4b6c0 (LWP 35511) exited] [Thread 0x7fffd934c6c0 (LWP 35490) exited] [Thread 0x7fffda0df6c0 (LWP 35486) exited] [Thread 0x7fffdbfff6c0 (LWP 35471) exited] [Thread 0x7ffff0ec16c0 (LWP 35470) exited] [Thread 0x7ffff1d3f6c0 (LWP 35467) exited] [Thread 0x7ffff25406c0 (LWP 35466) exited] [Thread 0x7ffff2d416c0 (LWP 35465) exited] [Thread 0x7ffff35426c0 (LWP 35464) exited] [Thread 0x7ffff3a51900 (LWP 35459) exited] [Thread 0x7ffff36ce900 (LWP 35463) exited] [New process 35459] [Inferior 1 (process 35459) exited with code 01] (gdb) ardour-request-device: watched PID no longer exists - releasing device. |
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Very strange that ALSA vs JACK can make the difference here with "X Window System error - The error was 'BadWindow (invalid Window parameter)'." The only difference would be the engine dialog (select devices) > Could this be related to the fact that Ubuntu now uses Wayland only? Yes, some versions of Wayland's X11 compatibility are known to cause problems. |
| Date Modified | Username | Field | Change |
|---|---|---|---|
| 2026-01-21 20:00 | sojuzstudio | New Issue | |
| 2026-01-21 20:00 | sojuzstudio | Tag Attached: alsa | |
| 2026-01-21 20:53 | x42 | Note Added: 0029746 | |
| 2026-01-21 20:55 | x42 | Note Added: 0029747 | |
| 2026-01-21 21:26 | sojuzstudio | Note Added: 0029748 | |
| 2026-01-22 19:01 | sojuzstudio | Note Added: 0029751 | |
| 2026-01-22 23:20 | x42 | Note Added: 0029754 |
