[LAD] JACK and computer sleeping

[Stéphane Letz]

Le 6 mars 09 à 15:56, Hans Fugal a écrit :

> MarcO'Chapeau wrote:
>> On Thu, 5 Mar 2009 09:07:10 -0500, Paul Davis <paul at linuxaudiosystems.com 
>> >
>> wrote:
>>> On Thu, Mar 5, 2009 at 9:02 AM, nescivi <nescivi at gmail.com> wrote:
>>>
>>>> Hiho,
>>>>
>>>> It seems that JACK (just tested with v0.116) does not survive  
>>>> when the
>>>> computer is put to sleep, and woken up again.
>>>>
>>>> Is there any reason why this is so?
>>>
>>> JACK will see this as a major system malfunction. If you are using  
>>> JACK,
>> do
>>> not let your computer sleep, or suspend, or engage in CPU frequency
>>> scaling.
>>> These all appear to JACK as indistinguishable from your audio  
>>> interface
>>> ceasing to function in a way that leads it to quit or die.  
>>> Remember that
>>> JACK is watching the passing of absolute time.
>>
>> While cpu freq scaling *might* confuse JACK, it seems is not the  
>> case here.
>> Sleep is a whole different story...
>
> It's interesting that I haven't had major issues with sleep on my  
> laptop
> (running OSX). I didn't expect JACK to survive the first time and was
> surprised to see it come back to life with just an xrun or two. More
> often than not that's what happens, though it has crashed a few  
> times on
> resume. (disclaimer: I don't have JACK going all the time, so the  
> sample
> size isn't great. Also, I might have had it in soft mode.)
>

There is *nothing* specific done on OSX. I guess the CoreAudio  
interrupt just  stops and restart when system resume.

Stephane