[ubuntu-studio-users] Jack can´t start

[Joao Bruno]

I'm not sure of course,  but I think should be something between jack and
pulse audio, missing divers maybe. I will try everything I can. I can
always reinstall the sistem.
Thank you,  JB
On 29 Mar 2016 6:49 p.m., "Ralf Mardorf" <ralf.mardorf at alice-dsl.net> wrote:

> On Tue, 2016-03-29 at 16:37 +0100, Joao Bruno wrote:
> > this the jack version
> > jb at jb-SATELLITE-L50-B:~$  pulseaudio --kill
> > jb at jb-SATELLITE-L50-B:~$ jackd -dalsa -dhw:1 -r48000 -p1024 -n3
> > jackdmp 1.9.10
> > Copyright 2001-2005 Paul Davis and others.
> > Copyright 2004-2013 Grame.
> > jackdmp 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
> > no message buffer overruns
> > no message buffer overruns
> > no message buffer overruns
> > JACK server starting in realtime mode with priority 10
> > audio_reservation_init
> > Acquire audio card Audio1
> > creating alsa driver ... hw:1|hw:1|1024|3|48000|0|0|nomon|swmeter|-
> > |32bit
> > configuring for 48000Hz, period = 1024 frames (21.3 ms), buffer = 3
> > periods
> > ALSA: final selected sample format for capture: 32bit integer little-
> > endian
> > ALSA: use 3 periods for capture
> > ALSA: final selected sample format for playback: 32bit integer little-
> > endian
> > ALSA: use 3 periods for playback
>
> If you now would start qjackctl, while jackd still runs in the terminal,
> it would work.
>
> > this is the message after i did your orientations
>
> No, you most likely didn't continue running jackd in the terminal, when
> launching qjackctl.
>
> > [snip]
> > /dev/audio|/dev/audio|1024|3|44100|0|0|nomon|swmeter|-|32bit
>                                ^^^^^
>                                ^^^^^
> Qjackctl does use different settings, instead of 48000 used by the
> terminal and qjackctl by default doesn't kill a running instance of
> jackd, it does use it, as long as there is no bug or a script is started
> by the jackd settings. In qjackctl's settings ensure that in "Options"
> "Execute script at startup" is unchecked, disabled.
>
> > ALSA lib control.c:953:(snd_ctl_open_noupdate) Invalid CTL /dev/audio
> > control open "/dev/audio" (No such file or directory)
> > ALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM /dev/audio
> > ALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM /dev/audio
> > ALSA: Cannot open PCM device alsa_pcm for playback. Falling back to
> > capture-only mode
> > Cannot initialize driver
> > JackServer::Open failed with -1
> > Failed to open server
> > 16:36:09.369 JACK was stopped with exit status=255.
> > [snip]
>
> Your qjackctl settings are bad, and/or qjackctl is buggy and or some
> pulseaudio-jack-thingy still gets started.
>
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