PipeWire’s JACK frontend causes Ardour 7 to deadlock on exit

• PipeWire version (pipewire --version): 0.3.59
• Distribution and distribution version (PRETTY_NAME from /etc/os-release): EndeavourOS
• Desktop Environment: XFCE 4.16
• Kernel version (uname -r): 6.0.2-arch1-1

Description of Problem:

When using Ardour 7 with PipeWire acting as a JACK implementation, exiting the program causes it to encounter a deadlock.

This issue was reported to Ardour, but according to x42, this seems to be a threading bug in PipeWire.

How Reproducible:

Steps to Reproduce:

1. Open Ardour
2. Create a new project
3. Save the project
4. Quit Ardour

Actual Results:

Ardour exits

Expected Results:

Ardour does not exit – the window remains open but the program is unresponsive

Additional Info (as attachments):

• pw-dump > pw-dump.log: pw-dump.log
• GDB backtrace: backtrace.txt