====== Qjackctl Dbus ======
{{  :blog:qjackctl.png?200}}

A while ago I've written a patch to [[http://qjackctl.sourceforge.net/|qjackctl]] which adds [[http://www.freedesktop.org/wiki/Software/dbus|DBUS]] support to start and stop the JACK audio server. It's available and enabled by default in qjackctl from version 0.3.4.11 upwards.

The main use-case for it is to bring up the [[http://jackaudio.org|JACK]] server after a suspend/resume cycle on laptops. More information about this is available on a [[:wiki:qjackctl_dbus|Wiki Page]]. This blog will just give minimal usage information to tease you :)

An example script to re-launch JACK with the last chosen preset looks like this:

''/etc/pm/sleep.d/90qjackctl.sh''
  #!/bin/bash
  case $1 in
    thaw|resume)
      (sleep 4 ; dbus-send --system /org/rncbc/qjackctl org.rncbc.qjackctl.start)&
      ;;
    *)
      ;;
  esac

{{tag>audio floss jack}}