[LAU] jackd process can't be killed

Dragan Noveski perodog at gmx.net
Wed Dec 31 10:05:41 EST 2008

R Dicaire wrote:
> On Tue, Dec 30, 2008 at 3:42 PM, Adam Sampson <ats at offog.org> wrote:
>> This looks like the 2.6.26 MIDI sequencer problem -- MIDI doesn't work,
>> and after jackd has opened the sequencer device for the first time,
>> it'll hang trying to close it. Future attempts to open the sequencer
>> device then fail because it's in use.
> Ahhhhhhhh, I was never aware there was a midi issue...jackd could be
> killed when I didn't use -X, excellent.
> Thank you VERY much.

i am not sure if it has anything to do with your issue, but as you say, 
it happens only when you start jackd with -Xseq, it could be that this 
is the root of the problem. i discovered a trouble in ardour, when 
running jackd with -Xseq explicitly. you may have a look here:


in this case, the issue for me is reproducible  very easy, but only if 
running with -Xseq.
ardour2.7.1, jackd0.116.1, alsa1.0.17, Linux #2 PREEMPT RT

know that this does not save your problem, but perhaps it is interesting.

> Now here's another situation. I've built alsa and jack. I installed
> them into custom locations. In my users .asoundrc
> I have a pcm device that calls the jack plugin. How would I get calls
> to this plugin to use my custom built
> /usr/local/alsa/lib/alsa-lib/libasound_module_pcm_jack.so instead of
> the system one in /usr/lib/alsa-lib ?

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