module-jackdbus-detect in PulseAudio

Tim Cook timothywayne.cook at
Fri Dec 10 11:01:07 GMT 2010

Hi David,

I just did the upgrade but I do not see any JACK server or sink option
in pamanger after starting JACK.  I did set Dbus on and restarted.  I
also do not see anything JACK related in PA modules list.  

What magic am I missing? :)

BTW: This is with the new generic kernel.


On Fri, 2010-12-10 at 09:36 +0100, David Henningsson wrote:
> Hello Ubuntu Studio and Audio developers,
> A week or two ago I wrote a new PulseAudio module that detects the 
> presence of JACK server, and adds a sources and a sink when JACK is 
> started. It is now being shipped in Natty since yesterday [1].
> This version uses JACK's dbus interface to detect server being started 
> or stopped, i e /usr/bin/jackdbus instead of /usr/bin/jackd.
> If you use qjackctl to control the server, make sure that you check the 
> checkbox "Enable D-Bus interface" under Setup -> Misc.
> * Anybody against me changing the default of qjackctl in Natty to have 
> this checkbox checked?
> The other open question, where I'm not sure, is about the default, and 
> I'd like your opinion on the matter. We have these options:
> 1) We start it by default via the startup script.
> 2) We do not start automatically when PulseAudio starts, but add a 
> checkbox to the paprefs application that optionally starts this module.
> For both versions, there is this question as well:
> a) We have autoconnect=true, which means that the PA Jack sink will 
> connect to the "system"/soundcard sink of JACK
> b) We have autoconnect=false, which means there will be a PA Jack sink 
> but you'll have to connect it to something yourself.
> (The same thing applies to the PA Jack Source, of course.)
> -- 
> David Henningsson, Canonical Ltd.
> [1] Perhaps one should wait a day or two before upgrading though, see 

Timothy Cook, MSc
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