[Jack-Devel] Jack won't start on boot

Thomas Brand tom at trellis.ch
Thu Jul 20 16:36:32 CEST 2017

On Thu, July 20, 2017 16:21, Chris Caudle wrote:
> On Thu, July 20, 2017 5:35 am, Yuri wrote:
>> The fact that any DBus-linked program requires X indicates some
>> problem. This should never happen.
> It did not require X, just that the DISPLAY environment variable be set.
> Explained later by Rowan.

according to common/Jackdmp.cpp:320 it seems that the environment variable
$JACK_NO_AUDIO_RESERVATION would be the envisioned way to go. i haven't
found this in the manpage, probably it's missing.

what if there would be a variable that if NOT set would fallback when DBus

#if defined(JACK_DBUS) && defined(__linux__)
    if (getenv("JACK_NO_AUDIO_RESERVATION")) {
        server_ctl = jackctl_server_create(NULL, NULL);
    else {
        server_ctl = jackctl_server_create(audio_acquire, audio_release);
        /* If device reservation with DBus failed and fallback isn't
         * explicitely turned off, try to start without DBus
        if (server_ctl == NULL && !getenv("JACK_NO_DBUS_FALLBACK")) {
            fprintf(stderr, "Failed to connect to DBus. Falling back...\n");
            server_ctl = jackctl_server_create(NULL, NULL);


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