Jack O'Quin wrote: The old stack is exactly what you need. Good question. Do you have any suggestions on how we should be doing it? I remember that someone tried to do it, but didn't succeed.

You are suffering from hostcontrolleritis. The O2 micro controller has some issues that cause it to stall under certain conditions. There are few things that can help: 1) applying the cycle skip patch to the 1394 kernel sources: http://subversion.ffado.org/wiki/TxSkipPatched 2) decreasing the amount of kernel space buffering will result in this being less likely to occur. You can specify a config file: http://subversion.ffado.org/wiki/ConfigFile Setting the max_nb_buffers_xmit to 32 (or lower) should help. Note however that this will result in a higher sensitivity to xruns since this means that userspace has to refill the buffers every 32/2*8 frames. Probably the best solution is to get a better host controller.

Jack O'Quin wrote: The old stack is exactly what you need.

Good question. Do you have any suggestions on how we should be doing it? I remember that someone tried to do it, but didn't succeed. You are suffering from hostcontrolleritis. The O2 micro controller has some issues that cause it to stall under certain conditions. There are few things that can help: 1) applying the cycle skip patch to the 1394 kernel sources: http://subversion.ffado.org/wiki/TxSkipPatched 2) decreasing the amount of kernel space buffering will result in this being less likely to occur. You can specify a config file: http://subversion.ffado.org/wiki/ConfigFile Setting the max_nb_buffers_xmit to 32 (or lower) should help. Note however that this will result in a higher sensitivity to xruns since this means that userspace has to refill the buffers every 32/2*8 frames. Probably the best solution is to get a better host controller. Greets, Pieter > > $ jackd -Rv -P70 -d firewire -v6 -r48000 -p1024 -n3 2> ffado-jack.log > > getting driver descriptor from /usr/lib/jack/jack_freebob.so > getting driver descriptor from /usr/lib/jack/jack_oss.so > getting driver descriptor from /usr/lib/jack/jack_firewire.so > getting driver descriptor from /usr/lib/jack/jack_net.so > getting driver descriptor from /usr/lib/jack/jack_alsa.so > getting driver descriptor from /usr/lib/jack/jack_dummy.so > jackd 0.115.3 > Copyright 2001-2005 Paul Davis and others. > jackd comes with ABSOLUTELY NO WARRANTY > This is free software, and you are welcome to redistribute it > under certain conditions; see the file COPYING for details > > JACK compiled with System V SHM support. > registered builtin port type 32 bit float mono audio > registered builtin port type 8 bit raw midi > clock source = system clock via clock_gettime > start poll on 3 fd's > loading driver .. > new client: firewire_pcm, id = 1 type 1 @ 0x806ea80 fd = -1 > new buffer size 1024 > registered port system:capture_1, offset = 4096 > registered port system:capture_2, offset = 8192 > registered port system:capture_3, offset = 12288 > registered port system:capture_4, offset = 16384 > registered port system:capture_5, offset = 20480 > registered port system:capture_6, offset = 24576 > registered port firewire_pcm:C6_dev0_MidiIn, offset = 4096 > registered port system:playback_1, offset = 0 > registered port system:playback_2, offset = 0 > registered port system:playback_3, offset = 0 > registered port system:playback_4, offset = 0 > registered port system:playback_5, offset = 0 > registered port system:playback_6, offset = 0 > registered port system:playback_7, offset = 0 > registered port system:playback_8, offset = 0 > registered port firewire_pcm:P8_dev0_MidiOut, offset = 0 > ++ jack_sort_graph > ++ jack_rechain_graph(): > +++ client is now firewire_pcm active ? 1 > client firewire_pcm: internal client, execution_order=0. > -- jack_rechain_graph() > -- jack_sort_graph > starting server engine shutdown > stopping driver > server thread back from poll > unloading driver > freeing shared port segments > stopping server thread > stopping watchdog thread > last xrun delay: 0.000 usecs > max delay reported by backend: 0.000 usecs > freeing engine shared memory > max usecs: 0.000, engine deleted