[linux-audio-user] Problems starting JACK...

[Rui Nuno Capela]

Carlos Pino wrote:
> 
> Hi everyone,
> 
> 
> 
> Peter Lutek escribió:
> 
>> Rui Nuno Capela wrote:
>>
>>> Peter Lutek wrote:
>>>
>>>> Michael T D Nelson wrote:
>>>>
>>>>> Paul Davis wrote:
>>>>>
>>>>>> On Thu, 2005-11-10 at 14:50 +0000, Michael T D Nelson wrote:
>>>>>>
>>>>>>> Paul Davis wrote:
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>
>>>>>>>> go to the qjackctl setup dialog and make sure that the command 
>>>>>>>> to start
>>>>>>>> jack is "jackd" and not "jackstart". "jackstart" is purely for 2.4-
>>>>>>>> kernel based systems and should not be used on a 2.6-kernel based
>>>>>>>> system.
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> Thanks for the prompt reply, but it's set to "jackd" already.
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>> well then something is very confused. your error messages included a
>>>>>> line about not being able to write to the jackstart sync pipe.
>>>>>>
>>>>>> did you install jackd as a normal CCRMA package?
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>> Yep. And it was working fine until a couple of weeks ago. I don't 
>>>>> think I have done anything untoward.
>>>>>
>>>>> The only software which I compile from source is completely 
>>>>> unrelated to audio (things like OpenVPN, mainly for work).
>>>>>
>>>>> I have just noticed a recent thread on this list (started by Carlos 
>>>>> Pino) with a very similar sounding problem.
>>>>>
>>>> yes... i was in on that thread. i get the jackstart sync pipe error 
>>>> message when starting jackd with qjackctl, however it does start 
>>>> fine despite the error.
>>>
>>>
>         The same for me.
> 
> 
> 
> 
> 
>>>> when starting jackd with the same parameters, but from the 
>>>> commandline, i do not get the jackstart sync pipe error message. 
>>>> perhaps it's a qjackctl bug?
>>>>
>>>> -p
>>>
>>>
>>>
>>>
>>> Have you tried whether switching off standard output capture on 
>>> qjackctl/setup/options makes any difference on that "jackstart sync 
>>> pipe" issue?
>>
>>
>>
>> hmm... seems to make it go away, but is that just because the error 
>> message is no longer being echoed to the message window? when i start 
>> qjackctl from a terminal window, i don't any messages in the terminal 
>> about jack status anyway, so it's hard to tell.
>>
>> -p
>>
>       If this can be usefull,here is the window messages output of 
> qjackctl before an after change the "Capture standard output" option,and 
> the shell output of jackd with the same config that qjackctl.
> 
> 
> 
>    *Before*
> 
> 
> 
> 11:36:08.520 Patchbay deactivated.
> 11:36:08.570 Statistics reset.
> 11:36:08.687 MIDI connection graph change.
> 11:36:08.801 MIDI connection change.
> 11:36:09.004 MIDI connection change.
> 11:36:46.241 Startup script...
> 11:36:46.241 artsshell -q terminate
> sh: artsshell: command not found
> 11:36:46.461 Startup script terminated with exit status=32512.
> 11:36:46.461 JACK is starting...
> 11:36:46.462 /usr/bin/jackd -R -dalsa -dhw:0 -r44100 -p256 -n2
> 11:36:46.466 JACK was started with PID=3592 (0xe08).
> cannot write to jackstart sync pipe 4 (Bad file descriptor)
> jackd: wait for startup process exit failed
> jackd 0.100.0
> 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.
> loading driver ..
> apparent rate = 44100
> creating alsa driver ... hw:0|hw:0|256|2|44100|0|0|nomon|swmeter|-|32bit
> control device hw:0
> configuring for 44100Hz, period = 256 frames, buffer = 2 periods
> nperiods = 2 for capture
> nperiods = 2 for playback
> 11:36:48.665 Server configuration saved to "/home/supertux/.jackdrc".
> 11:36:48.668 Statistics reset.
> 11:36:48.690 Client activated.
> 11:36:48.693 Audio connection change.
> 11:36:48.701 Audio connection graph change.
> 
> *
> After *
> 
> 
> 11:34:32.194 Patchbay deactivated.
> 11:34:32.245 Statistics reset.
> 11:34:32.360 MIDI connection graph change.
> 11:34:32.475 MIDI connection change.
> 11:34:32.678 MIDI connection change.
> 11:34:46.166 Startup script...
> 11:34:46.166 artsshell -q terminate
> sh: artsshell: command not found
> 11:34:46.384 Startup script terminated with exit status=32512.
> 11:34:46.384 JACK is starting...
> 11:34:46.385 /usr/bin/jackd -R -dalsa -dhw:0 -r44100 -p256 -n2
> 11:34:46.407 JACK was started with PID=3566 (0xdee).
> 11:34:48.538 Server configuration saved to "/home/supertux/.jackdrc".
> 11:34:48.539 Statistics reset.
> 11:34:48.557 Client activated.
> 11:34:48.558 Audio connection change.
> 11:34:48.568 Audio connection graph change
> 
> 
> *Shell*
> 
> supertux at sid:~$ /usr/bin/jackd -R -dalsa -dhw:0 -r44100 -p256 -n2
> jackd 0.100.0
> 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.
> loading driver ..
> apparent rate = 44100
> creating alsa driver ... hw:0|hw:0|256|2|44100|0|0|nomon|swmeter|-|32bit
> control device hw:0
> configuring for 44100Hz, period = 256 frames, buffer = 2 periods
> nperiods = 2 for capture
> nperiods = 2 for playback
> 
> 
>  I have this working on a Pentium IV 2.6 ,1gb ddr,terratec dmx6 fire 
> (ice1712) running Debian Sid and the A/Demudi kernel 2.6.13-1-multimedia.
>    Still learning how to compile my own :p .
> 
> 
> 
> 
> Saludos
> Cheers
> -- Carlos.

Again, I believe the "cannot write to jackstart sync pipe 4 (Bad file 
descriptor)" message is nothing to worry about. And as it seems from the 
results above it just confirms my suspicion. If you're sticking with a 
2.6 kernel, just don't configure jackd with --enable-capabilities and 
you're off the hook ;)

Cheers.
-- 
rncbc aka Rui Nuno Capela
rncbc at rncbc.org