There have been problems using the jack firewire backend if the alsa firewire module is loaded. From: http://lists.linuxaudio.org/pipermail /linux-audio-user/2015-August/102283.html try: rmmod snd_dice snd_firewire_lib to see if this is the case for you. Note that the first driver listed (snd_dice) may not be the right one in your case, but looking for for modules that depend on snd_firewire_lib using lsmod should show what you are using.
The other thing to try (maybe first) is using pavucontrol, in the config panel, turn the profile for the firewire device "off". so that you can be sure the alsa firewire driver is not being used. The thing that mostly just works is to tell jackd to just use the same firewire device as an alsa device instead of using the jack firewire back end. This not a jack bug, but a kernel module usage bug. The firewire device can only be used one way and whichever way it is used the kernel modules for the other way need to be black listed by the user. The intent of the default install is to use the alsa modules. -- You received this bug notification because you are a member of Ubuntu Studio Bugs, which is subscribed to Ubuntu Studio. Matching subscriptions: UbuntuStudio Bugs https://bugs.launchpad.net/bugs/1484627 Title: jackd won't start again in the same session after having exited Status in Ubuntu Studio: New Bug description: Actual behavior with pulseaudio-module-jack installed: 1. start jackd with firewire device. 2. stop jackd 3. run application which requires audio, using pulseaudio 4. exit the application 5. try to start jackd with firewire device result: jackd will fail expected behavior: jackd should start Without pulseaudio-module-jack the expected result is just fine. system: ubuntustudio 15.04 64bit, audio device: audiofire12 (echo) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntustudio/+bug/1484627/+subscriptions -- Mailing list: https://launchpad.net/~ubuntustudio-bugs Post to : [email protected] Unsubscribe : https://launchpad.net/~ubuntustudio-bugs More help : https://help.launchpad.net/ListHelp
