Bug#565342: newly released libffado2-based jackd fails with "firewire ERR: Could not start streaming threads: -1"

[Jonas Smedegaard]

Hi Adrian,

On Fri, Jan 15, 2010 at 01:41:09PM +0100, Adrian Knoth wrote:
>On Fri, Jan 15, 2010 at 12:37:01PM +0100, Jonas Smedegaard wrote:
>> jonas at auryn:~$ cat /proc/version Linux version 2.6.32-trunk-amd64 
>> (Debian 2.6.32-5) (ben at decadent.org.uk) (gcc version 4.3.4 (Debian 
>> 4.3.4-6) ) #1 SMP Sun Jan 10 22:40:40 UTC 2010
>
>I see 2.6.32 here. Make sure to have libraw1394-2.0.5 installed.

Should be ok: libraw1394-11 2.0.5-1 installed


>> jonas at auryn:~$ jackd -dfirewire -r44100 -n10 -p 2048 -v2
>
>IIRC, the FA-66 has a manual samplerate switch? Make sure it matches
>what you specify for jackd.

I am aware of that - and misconfiguration there leads to other error.  
But thanks for pointing it out anyway!


>Also: -n10 clearly is too much, best is to omit -n completely. -p 2048 
>is also rather high, neglect it or set it to 512.
>
>Finding the right value(s) for p (and n) could be a hard job, so 
>playing with those might be useful.

I started with relying on defaults - setting them higher was out of 
desparation, after noticing some other advice saying that this 
particular error could be due to too _low_ values for these.

Are you suggesting to shoot in the dark for magic combinations here, and 
that _both_ too low and too high values lead to same error messages?


>Also make sure to powercycle your FA-66 between failing runs, 
>otherwise, the device could be left in some locked-up state.

Thanks for mentioning.  I did powercycle between some of the attempts 
but not all - will do it consistently from now on (although I suspect 
that the box hanging leads to other errors, at least they did in the 
past with freebob).


>> Cannot switch to ePS_DryRunning from ePS_WaitingForStream
>
>This basically means that FFADO cannot start the streaming engine.
>Unfortunately, there are many reaons causing this error:
>
>  * old firmware (depending on the device, but yours probably is fine)
>
>  * new Juju firewire stack and libraw1394 < 2.0.5
>
>  * device in lock state from previous runs
>
>  * crappy firewire host controllers, you could check
>    http://subversion.ffado.org/wiki/HostControllers
>
>  * something else
>
>
>I don't believe there's something wrong with the FFADO or jackd 
>packages in Debian, it's just the usual trouble with FFADO.

Thanks for the pointers.  I'll try some more.


>You could join the FFADO user mailing list and ask for help.
>
>
>In any case, let me (and this bug) know if something works for you...

I will.


  - Jonas

-- 
* Jonas Smedegaard - idealist & Internet-arkitekt
* Tlf.: +45 40843136  Website: http://dr.jones.dk/

  [x] quote me freely  [ ] ask before reusing  [ ] keep private
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