[PD] Freezes with Pd-Extended and Jack

[Raphael Raccuia]

Hi,
late for this, but problem persists in 0.43release.
https://sourceforge.net/tracker/?func=detail&aid=3602109&group_id=55736&atid=478070 

I confirm it has to do with latency: under ~20ms, bug occurs. Also 
occurs when changing soundconfig.
Two things:
-as said, pd shouldn't recreate jack client on each dsp on. Other 
problem is that a jack patch is lost and replaced by straight connection 
(pd 0 -> system out 1 etc...). Very annoyingfor who use complex 
jack-patches...
http://sourceforge.net/tracker/?func=detail&aid=3519504&group_id=55736&atid=478070

- >20ms latency is very highfor live processing: I calculated pd adds 
22ms. The round trip latency in the lower stable state for me at 48K is 
88ms (measured with jdelay tool, with RME multiface)! make a sound, have 
a coffee and come back to listen (a bit exaggerated ;-) )...

rr

Le 27. 11. 12 10:20, Roman Haefeli a écrit :
> Hi all
>
> Johnny-come-lately I am . . .
>
> I've experienced this problem since 0.43 (vanilla and extended), I
> believe, but I haven't really investigated it, because it didn't happen
> that often and I wasn't able to reliably reproduce it. Now I figured out
> a way to reliably reproduce it. It seems the likeliness is related to
> jackd's latency settings. The shorter the latency, the likelier is pd
> going to freeze. With a setting of 128 frames/period and 2
> periods/buffer, I can reliably freeze pd by turning DSP off and on.
>
> The problem seems related to the fact that switching DSP also switches
> the jack client on and off. I think the preferred way would be to be
> able to switch DSP on/off independently from switching audio back-end
> on/off.
>
> @Miller
> Are you still planning to seperate dsp switching from audio backe-end
> switching for 0.44?
>
> Roman
>
>
>
> On Mit, 2012-11-21 at 20:35 -0200, Esteban Viveros wrote:
>> Hello,
>>
>>
>> I'm using pd-extended 0.43.4, installed via Hans-Cristoph Steiner ppa.
>> I'm using this version because I can't install the stable version in
>> Ubuntu 12.04.
>>
>>
>> The problem is, when I start pd with Jack in -rt mode or wherever
>> mode, if I turn on dsp, they work well, but if I turn off, and try to
>> turn on yet dsp, pd-extended freeze...
>>
>> Closing Qjackctl (after some time ubuntu can close that)
>> pd-extended returns to work, and I can use on alsa directly
>> sucessfull..
>>
>>
>> Someone knows where I can comunicate this bug to the developers? Is
>> here the place?
>>
>>
>> Thanks a lot!
>>
>>
>> -- 
>>
>>
>> Esteban Viveros
>>
>> (27) 8815 7170
>> (27) 3066 0359
>> (11) 95761 4125
>> (11) 2738 7868
>>
>> www.bandpage.com/estebanviveros
>>
>> https://www.facebook.com/estebanviveros.art
>>
>> http://www.papodecompositor-es.blogspot.com.br/
>>
>> http://expurgacao.art.br/
>>
>>
>>
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>
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