Am 03.02.2017 um 16:12 schrieb Mac: > My question is what SHOULD i be doing in my code to prevent this? It depends. > (Obviously, I can start JACK in my code if it's not running...but, I've > not found any info on checking for JACK and starting it from python. > AND, how do, or can, I get JACK to start after this occurs without a reboot? There are two common ways to start JACK: a) Simply as a subprocess of your user session or a program using JACK. b) By starting jack-dbus and then configuring and starting JACK via the DBUS interface. To make solution a) (supposedly) more convenient, if a program tries to connect to JACK, it can specify to have the JACK process automatically started. However this can lead to problems and confusion*, if JACK is normally run via method b). Luckily there's an environment variable to disable this behaviour: JACK_NO_START_SERVER. Because I use jack-dbus, I have the line "export JACK_NO_START_SERVER=1" in my ~/.bashrc, so programs using JACK never try to automatically start JACK. So I prefer solution b) and I have written a small Python application, which lets me control jack-dbus from a small toolbar applet: https://github.com/SpotlightKid/jack-select This application contains a Python module to communicate with jack-dbus via (surprise!) DBUS called "jackcontrol.py". You can use it like this: import dbus from jackselect.jackcontrol import JackCtlInterface, get_jack_controller bus = dbus.SessionBus() jackdbus = get_jack_controller(bus) jackctl = JackCtlInterface(jackdbus) if jackctl.is_started(): print("JACK already running!") else: jackctl.start_server() HTH, Chris * Just search the mailing list on this topic and you'll find endless threads ;)
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