Re: [Rosegarden-user] jack crash at startup

[Marco S. <mar...@gm...>]

Hi Dave, Thank you for the reply!

I have never had success launching jack with that sample rate and buffer
> size. Try either 44100 or 48000 for your sample rate (I would try 44100
> first) and 1024 for the buffer size.
>

My problem is not with JACK or with any other audio application. I normally
use Sample rate=192000, Frames/Period=512. I can start JACK with those
parameters and it runs stable with no xruns, even when I record several
tracks with Ardour. I was trying Frames/Period=2048 (=>higher latency) just
to be sure it was not a JACK problem. JACK only crashes when I try to lauch
Rosegarden. Usually I can also listen to midi files (with some minor
problems) using Qsynth/fluidsynth and aplaymidi (or pmidi). I probably
should have chosen "jack crash at rosegarden startup" as a subject.


> As for launching Rosegarden again after a crash, you may need to clean up
> old processes that the system sees as running. If you run:
>
> ps ax | grep rose
>
> you will find the process id number for any Rosegarden processes still in
> memory. Then issue the command:
>
> kill -9 process id number ( where process id number = the number you got
> from the ps command)
>

After the crash there is a sleeping rosegardensequencer that I can easily
kill, but I cannot start JACK anymore and my audio system does not respond
(both cards):

$ ps ax | grep jack
 6346 ?        Zsl    0:11 [jackd] <defunct>

I'm pretty sure it is a Rosegarden or KDE problem (I'm using Gnome). I've
also tried to previously run kdeinit or dcopserver with no results.

Any other advice?