On Sat, 2017-11-11 at 02:07 +0000, Jaime T wrote: > Hi all. > > As per "man jackd", "JACK is evolving a mechanism for automatically > starting the server when needed. Any client started without a running > JACK server will attempt to start one itself...". I've got a laptop > running Debian 9 (Stretch) and this "automatic starting" mechanism for > jack works perfectly. I know this because "ps aux | grep -i jackd" > returns: > > nonroot 10609 0.0 0.0 4728 852 pts/4 S+ 01:08 0:00 grep -i jackd > > before I run jack-play, > > nonroot 10640 8.3 3.9 83412 82100 ? SLsl 01:11 0:00 > /usr/bin/jackd -T -ndefault -T -d alsa > nonroot 10650 0.0 0.0 4728 828 pts/4 S+ 01:11 0:00 grep -i jackd > > while I am running jack-play, and: > > nonroot 10658 0.0 0.0 4728 836 pts/4 S+ 01:12 0:00 grep -i jackd > > (again) after jack-play has terminated. > > I thought that pulseaudio might be able to use this autostart > mechanism, so I've installed pulseaudio-module-jack, but when I run > "pactl load-module module-jack-sink channels=2", I get either: > "Failure: Module initialization failed" or "Module load failed.", and > "tail -f /var/log/syslog" returns something like: > > Nov 11 01:52:07 piano pulseaudio[887]: [pulseaudio] > module-jack-sink.c: JACK error >JACK died - calling shutdown handler< > Nov 11 01:52:29 piano pulseaudio[887]: [pulseaudio] > module-jack-sink.c: JACK error >connect(2) call to > /dev/shm/jack-1000/default/jack_0 failed (err=No such file or > directory)< > Nov 11 01:52:30 piano pulseaudio[887]: [pulseaudio] > module-jack-sink.c: JACK error >connect(2) call to > /dev/shm/jack-1000/default/jack_0 failed (err=No such file or > directory)< > Nov 11 01:52:31 piano pulseaudio[887]: [pulseaudio] > module-jack-sink.c: JACK error >connect(2) call to > /dev/shm/jack-1000/default/jack_0 failed (err=No such file or > directory)< > Nov 11 01:52:32 piano pulseaudio[887]: [pulseaudio] > module-jack-sink.c: JACK error >connect(2) call to > /dev/shm/jack-1000/default/jack_0 failed (err=No such file or > directory)< > Nov 11 01:52:33 piano pulseaudio[887]: [pulseaudio] > module-jack-sink.c: JACK error >connect(2) call to > /dev/shm/jack-1000/default/jack_0 failed (err=No such file or > directory)< > Nov 11 01:52:34 piano pulseaudio[887]: [pulseaudio] > module-jack-sink.c: JACK error >connect(2) call to > /dev/shm/jack-1000/default/jack_0 failed (err=No such file or > directory)< > Nov 11 01:52:35 piano pulseaudio[887]: [pulseaudio] > module-jack-sink.c: JACK error >attempt to connect to server failed< > Nov 11 01:52:35 piano pulseaudio[887]: [pulseaudio] > module-jack-sink.c: jack_client_open() failed. > Nov 11 01:52:35 piano pulseaudio[887]: [pulseaudio] module.c: Failed > to load module "module-jack-sink" (argument: "channels=2"): > initialization failed. > > Note that if I explicitly (manually) start jackd *before* running > "pactl load-module module-jack-sink channels=2", then all is good. > > I have also found > https://docs-old.fedoraproject.org/en-US/Fedora/16/html/Musicians_Guide/sect-Musicians_Guide-Integrating_PulseAudio_with_JACK.html > which makes me think that this *should* work (it includes the words > "When PulseAudio starts JACK"). > > My question is: is pulseaudio's "not automatically starting" jackd > expected, or is it a bug? I believe jack_client_open() should start jackd, but apparently that's not working. I'm not familiar with how the automatic starting works, I can only tell that PulseAudio doesn't deliberately disable the automatic jackd starting. -- Tanu https://www.patreon.com/tanuk
