[LAD] [Jackit-devel] [PATCH] jack dbus and logs improvement

Nedko Arnaudov nedko at arnaudov.name
Tue Dec 18 16:24:54 UTC 2007

Krzysztof Foltman <wdev at foltman.com> writes:

> Nedko Arnaudov wrote:
>> So having jackd behave in orthagonal way is not confusing? Like, jackd
>> process is running, why my apps cannot connect?!?!?
> In normal situations, this jackd process (the launcher) would be only
> short-lived (less than a second). It might hang for some reason, because
> of faulty driver or something else, but then it would be a rare
> exception, not a rule. Plus, it's no worse than what would happen in
> non-dbus jack (where jackd would be present in process list, but would
> not respond).
> If the "jackd in engine mode" (jackd started with --dbus) is running,
> applications are able to connect, aren't they?

From what i've understood of Dave's patch, it enables jackd executable
to start jackdbus thing (same executable). I.e. no separate launcher

> Or maybe you should describe your "jackd process running, apps can't
> connect" scenario in more detail, in case I got it wrong? Basically,
> what turn of events results in jackd running but not responding to events?

jack controller dbus object is... controller, not server. it allows you
to mange jack server. This includes starting stopping jack server and
also configureing it.

Some terms explained:
 * jack server is the what is seen by jack clients (audio/midi, through
 * jack controller is a dbus object that can start jack server
 * jackd is the name of the executable starting jack server and parsing
   commandline arguments to configure both engine and driver
 * jackdbus is the name of the executable providing jack controller dbus
   object. it can start jack server, amoung other things it can do.

Discalimer: this is how it works now, not how Dave made it work.

You can have jackdbus process running and server stopped. And this
happens when you have jack controller dbus object activated but server
not started.

Nedko Arnaudov <GnuPG KeyID: DE1716B0>
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