[LAU] jackd suddenly stopped working

Hi all, I am using ubuntu studio 24.04 and it looks like jackd2 has stopped working on a jackd client that I am using: I used to start normally the jackd session as $ jackd -dnet -C 4 -P 8 but I've been seeing these messages since last night: jackdmp 1.9.21 [...] [W][02502.216661] default | [ control.c: 67 jackctl_server_create2()] not implemented 0x573493a90ec0 0x573493a91020 0x573493a910f0 [W][02502.216855] default | [ control.c: 154 jackctl_server_get_parameters()] 0x57349bb68d10: not implemented [W][02502.216925] default | [ control.c: 142 jackctl_server_get_drivers_list()] 0x57349bb68d10: not implemented [W][02502.216966] default | [ control.c: 225 jackctl_driver_get_name()] 0x57349bb68cf0: not implemented *Unknown driver "net"* [W][02502.217019] default | [ control.c: 94 jackctl_server_destroy()] 0x57349bb68d10: not implemented I am mostly worried about this "unknown driver net" messages, but perhaps the warnings are also relevant. Indeed something is changed and the backends have vanished: $ jackd --help [...] Available backends: [W][03817.946848] default | [ control.c: 233 jackctl_driver_get_type()] 0x5a35d9340cf0: not implemented [W][03817.946852] default | [ control.c: 225 jackctl_driver_get_name()] 0x5a35d9340cf0: not implemented dummy (slave) [W][03817.946857] default | [ control.c: 165 jackctl_server_get_internals_list()] 0x5a35d9340d10: not implemented Available internals: [W][03817.946863] default | [ control.c: 94 jackctl_server_destroy()] 0x5a35d9340d10: not implemented I found this topic https://linuxmusicians.com/viewtopic.php?t=19590 where reinstalling jack in arch fixed their issue.. I tried the same as $ dpkg -l | grep jackd $ sudo apt install --reinstall jackd jackd2 jackd2-firewire libjack-jackd2-0 libjack-jackd2-dev but the issue persists. I assume some automatic update caused this but I wonder if anyone else has seen this and if you managed to fix it somehow. Thank you in advance for your help