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QjackCtl 0.3.9 quietly emerges...

Guess what...?
the last of the remnants quietly emerges :)

QjackCtl 0.3.9 has been released, finally!

Enjoy && Have fun &&


Project page:


Weblog (upstream support):


QjackCtl is free, open-source software, distributed under the terms of the GNU General Public License (GPL) version 2 or later.


  • Killing D-BUS controlled JACK server is now made optional, cf. Setup/Misc/Stop JACK audio server on application exit. (a patch by Roland Mas, thanks).
  • Added include to shut up gcc 4.7 build failures.
  • Make(ing) -jN parallel builds now available for the masses.
  • A mis-quoting bug at the command line argument string may have been crippling the (unmaintained) Windows port since ever, leaving its main function to start jackd dead in the water, belly down :) now hopefully fixed (following a mail transaction with Stephane Letz and Mathias Nagorni, thanks).
  • Currently a JACK2-only feature, the JACK version string display at the About dialog box, must now be explicitly enabled on configure time (--enable-jack-version).
  • A new so called "Server Suffix" parameter option appears to rescue on the situations where QjackCtl falls short on extra, exquisite and/or esoteric command line options eg. (net)jack1/2 differences.
  • Fixed D-Bus Input/Output device parameter settings, filled when either interface is selected for Capture/Playback only. (probable fix for bug #3441860).
  • Fixed handling of installation directories to the configure script eg. --datadir, --localedir, --mandir. (after an original patch from h3xx, thanks).
  • Main window is now brought to front and (re)activated when clicking on the system tray icon instead of just hiding it.
  • Add current xrun count to the system tray icon tooltip, if not zero (after patch #3314633 by Colin Fletcher, thanks).

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Hi Rui

What's the icon theme used in the screenshot?

Cheers, Simon

rncbc's picture

the icons are the same as ever was, just the button text labels are disabled (cf Setup\Misc\Buttons).

now the color theme is the "Wonton Soup" from KDE4


At first, big thanks for your work
At second, could you make the keyboard shortcuts support in the qjackctl? or is it already there?

rncbc's picture

keyboard shortcuts should be interesting but it's a call from your desktop environment i'm afraid, not this particular application (qjackctl)

you can take advantage of the d-bus interface if enabled; these are the methods:

  • start - start the jack server;
  • stop - stop it;
  • main - toggle main window visibility;
  • messages - toggle Messages window/tab visibility;
  • status - toggle Status window/tab visibility;
  • session - toggle Session window visibility;
  • connections - toggle Connections window visibility;
  • patchbay - toggle Patchbay window visibility;
  • rewind - Rewind transport ;
  • backward - Backward transport ;
  • play - Play transport;
  • pause - Pause transport;
  • forward - Forward transport;
  • setup - show Setup dialog;
  • about - show About box;
  • quit - yep, Quit;
  • preset label - load label preset

eg. stop the jack server:

dbus-send --system / org.rncbc.qjackctl.stop

eg. load PRESET:

dbus-send --system / org.rncbc.qjackctl.preset string:PRESET


Okey, thanx. It's work.

Hey, Rui, thank you very much for Qjackctl. I'm using it for my work. You can see (hear) my work here:
Now, I'm migrating to 12.04 and Qjackctl has a little bug... I think it's not so complicated to fix...
If this message is annoying, please, forgive me and edit/delete it.
Thanks again!

rncbc's picture

your message is not annoying, rest assured.

i do really appreciate your efforts, but (there's always a but isn't it?) i don't have the means nor the time to fix your issue--ubuntu is not my beach nor gnome3 nor unity. it's all way beyond my reach and, sorry for that, i don't have the slightest interest in dealing with any of those beasts.

i had reports that it has been working, without major issues, on gnome2 and several other desktop environments (eg. xfce, lxde). of course it works on kde, it's the only one i do care about, mind you ;)

it sure looks like it's kind of a window manager trouble (unity or gnome3's, i don't know, i don't even care, sorry again). as said, in the bug tracker, please ask whether some other people is having the very same trouble on the ubuntu fora (as i believe you are a latin speaker you should know that "forums" is the wrong spell:)

meanwhile, let's try to start from scratch and delete the qjackctl configuration file (~/.config/; rerun and setup qjackctl as usual but then don't try the system tray icon and/or start minimize as seems to be the source of your troubles.

trial and error, that's the advice i can give you by this time ;)

cheers && apologize for my, say, careless reply?

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