[QJACKCTL] multiple versus single instance
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[QJACKCTL] multiple versus single instance
by James Warden
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Hello, I was wondering: is there an option to qjackctl so that we have only one running instance ? something like: qjackctl --single So next time I start it up, it will check whether there's already a running instance and just produce a message saying that one instance is already running (of course, the process state shall be examined in order to determine that the running qjackctl instance is a sound process). Moreover, there seems to be a side-effect to the fact that you can run multiple instances of qjackctl. While it may be fine in some contexts, if you close one of them, you bring down all the others. J. _______________________________________________ Jack-Devel mailing list Jack-Devel@... http://lists.jackaudio.org/listinfo.cgi/jack-devel-jackaudio.org |
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Re: [QJACKCTL] multiple versus single instance
by Rui Nuno Capela
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James Warden wrote:
> Hello, > > I was wondering: > > is there an option to qjackctl so that we have only one running > instance ? > > something like: > > qjackctl --single > > So next time I start it up, it will check whether there's already a > running instance and just produce a message saying that one instance > is already running (of course, the process state shall be examined in > order to determine that the running qjackctl instance is a sound > process). > > Moreover, there seems to be a side-effect to the fact that you can > run multiple instances of qjackctl. While it may be fine in some > contexts, if you close one of them, you bring down all the others. > unless you're using a pretty old and obsolete version (qjackctl < 0.3.3) you can only have one single instance running at anyone time (this applies to linux x11 only). if you start qjackctl when one is instance is already running it just quits and does nothing besides commanding the currently running qjackctl instance to start jackd immediately *iif* not already active at the time. there's a workaround however: setting distinct JACK_DEFAULT_SERVER environment variable lets you have multiple qjackctl instances alright, each commanding its own jackd server. wrt. one instance bringing all others down might be a concern: check whether you're not issuing a `killall jackd` on shutdown (see setup/options/scripting) ... cheers -- rncbc aka Rui Nuno Capela rncbc@... _______________________________________________ Jack-Devel mailing list Jack-Devel@... http://lists.jackaudio.org/listinfo.cgi/jack-devel-jackaudio.org |
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Re: [QJACKCTL] multiple versus single instance
by Rui Nuno Capela
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James Warden wrote:
> Thanks for the heads-up. > > I am using qjackctl 0.3.4 (QT 4.5.0) I can start a second instance > alright. The option 'killall jackd' is not on. Yet, if I quit the > second instance, it brings down the first. Something must be wrong > unless I misunderstood you. > strange. can you tell us the system environment details? x11 version and which window manager perhaps? byee -- rncbc aka Rui Nuno Capela rncbc@... _______________________________________________ Jack-Devel mailing list Jack-Devel@... http://lists.jackaudio.org/listinfo.cgi/jack-devel-jackaudio.org |
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Re: [QJACKCTL] multiple versus single instance
by Rui Nuno Capela
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James Warden wrote:
> sure: > > system: intel 32bit, core 2 duo, debian unstable kernel 2.6.29.4-rt16 > X11: xorg 7.3 windows manager: openbox 3.4.7.2-3 (-3 comes from > debian's packaging) KDE base 3.5.9 (not using 4.2 on my DAW). using > jack2 SVN@3559 > does the multi-instance behavior occurs when you have kwin (kde) as window manager? is anybody else experiencing this behavior? > > Rui Nuno Capela wrote: >> James Warden wrote: >>> >>> Thanks for the heads-up. >>> >>> I am using qjackctl 0.3.4 (QT 4.5.0) I can start a second >>> instance alright. The option 'killall jackd' is not on. Yet, if I >>> quit the second instance, it brings down the first. Something >>> must be wrong unless I misunderstood you. >>> >> strange. can you tell us the system environment details? x11 >> version and which window manager perhaps? >> seeya -- rncbc aka Rui Nuno Capela rncbc@... _______________________________________________ Jack-Devel mailing list Jack-Devel@... http://lists.jackaudio.org/listinfo.cgi/jack-devel-jackaudio.org |
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