Hi, I am using KXStudio repos on Debian Testing with Mackie 1640i firewire interface on Lenovo Thinkpad T420. I followed most of this https://wiki.linuxaudio.org/wiki/system_configuration to tune my system for audio work. I am starting JACKd with cadence automatically on boot. Everything seems to work fine with Ardour and even PulseAudio sink but when I run Catia (version 5:0.9.1 from kxrepos) it detects my FW device and shows I/O ports so I can patch connections but not showing the device and I/O ports in Claudia (version 5:0.9.1 from kxrepos). custom RT kernel 5.4.19-rt9-fw (I am using some patch to tune FIFO buffer on my firewire controller and get less xruns but same issue remains with stock debian RT kernel) with libffado 2.4.2-1. Here is log from jackd: https://del.dog/raw/jackd_log [GREP FOR THE ERROR LINES]. Possible important lines: ERROR: firewire MSG: Streaming thread running with Realtime scheduling, priority 30 ERROR: firewire MSG: Registering audio capture port firewire_pcm:000ff2050000145b_CH1_in If someone has some more experience with JACKd and know where to start debugging process please do post reply. Thanks in advance! AreYouLoco?