Re: [Jack-Devel] JackEngine::XRun: client = pure_data_0 was not run: state = 2 JackAudioDriver::ProcessGraphAsyncMaster: Process error

On 08.01.2014 07:10, Jonathan Woithe wrote:
> On Tue, Jan 07, 2014 at 06:57:10PM +0200, Alexandros Drymonitis wrote:
>> On Tue, Jan 7, 2014 at 6:38 PM, Jonathan Woithe <[hidden]> wrote:
>>> On Tue, Jan 07, 2014 at 06:31:51PM +0200, Alexandros Drymonitis wrote:
>>>> I'm running jack to use my firewire sound card (presonus firebox) with pure
>>>> data running this in the terminal: $ jackd -dfirewire
>>>> and jack runs with the firewire. But when I open pure data in another
>>>> terminal window with this $ pd -rt -jack
>>>> I get this in jack's terminal:
>>>> JackEngine::XRun: client = pure_data_0 was not run: state = 2
>>>> JackAudioDriver::ProcessGraphAsyncMaster: Process error
>>>> and the audio every now and then quits for half or a whole second and then
>>>> comes back.
>>> I *think* this indicates an issue in PureData.  However, if others more
>>> familiar with jackd messages indicate that it's a problem within FFADO I'll
>>> take this up.  If it is a FFADO problem it would be best to take the
>>> discussion to the ffado-user mailing list (detail are in the "Contact" link
>>> the ffado.org.
>>>
>>> After the dropout, is PureData usable and does the Firebox play back
>>> PureData
>>> audio?
>>>
>> Yes Pure Data is usable and the Firebox does play the Pure Data audio
> Hmm, interesting.  Do you only see the dropouts when you *start* PureData. 
> If so then it would appear that the problem might be associated with
> application startup or some issue with the way PureData does things while
> its jack system is starting up.
>
>>>> I also tried jack with audacity and I got drop outs there as well.
>>> Is the error message similar?  If it is it would tend to suggest that the
>>> problem is not within PureData or audacity.
>>>
>> There's no error printed when I open Audacity, but when I close it this is
>> printed in Jack's terminal:
>> JackProcessSync::LockedTimedWait error usec = 426660 err = Connection timed
>> out
>> JackEngine::ClientDeactivate wait error ref = 3 name = PortAudio
>>
>> No idea if this should be or not..
> No, me neither.
>
>> also, when I quit Pd though, I get this
>> in Jack's terminal:
>> JackEngine::XRun: client = pure_data_0 was not run: state = 1
>> JackAudioDriver::ProcessGraphAsyncMaster: Process error
>> Cannot write socket fd = 44 err = Broken pipe
>> Cannot write socket fd = 44 err = Broken pipe
>> Cannot write socket fd = 44 err = Broken pipe
>> Cannot write socket fd = 44 err = Broken pipe
>> Cannot write socket fd = 44 err = Broken pipe
>> Cannot write socket fd = 44 err = Broken pipe
>> Cannot write socket fd = 44 err = Broken pipe
> I don't run PureData myself.  It would be interesting to hear whether others
> see this.  This in turn may provide a clue as to whether it is related in
> some way to the start up glitch.
I can confirm this, I get those messages too from time to time when
trying to use Pd's Jack backend.
It does run once in a while with Jack, but then there are terrible audio
latencies (~0.5s!) to live event
inputs (OSC, MIDI) which makes it pretty much useless for me.

Pd 0.45.3, jackdmp 1.9.9.5, ArchLinux, kernel 3.12.6 x86_64

Apart from Pd, my Jack/audio setup works flawlessly, which makes Pd the
most probable culprit and not Jack itself, IMHO.
I'd recommend to search/ask the Pd list whether this is a known issue,
additionally.

Pd works fine with ALSA directly, though.
Hanspeter
>
>>>> I'm on ubuntu 12.04 with jack 1.9.8
>>>> Can anyone help me out?
>>> It would be worth trying a lowlatency kernel if you're not already using
>>> one.  This should be available via the Ubuntu package manager.
>>>
>> Hmm, I'm a noob to Linux, some tips on how to do this? what should I type
>> in the synaptic package manager? If I type lowlatency I get a bunch of
>> stuff (linux-headers-lowlatenct, linux-image-lowlatency etc.)
> Hopefully an ubuntu user can chime in here.  I'd have to see a full list of
> the "lowlatency" matchs and guess based on name.
>
> Regards
>   jonathan
> 
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