[PlanetCCRMA] Jack and KDE

[Nigel Henry]

On Wednesday 26 April 2006 21:13, Fernando Lopez-Lezcano wrote:
> On Wed, 2006-04-26 at 20:01 +0200, Nigel Henry wrote:
> > On Wednesday 26 April 2006 18:13, Fernando Lopez-Lezcano wrote:
> > > On Wed, 2006-04-26 at 09:20 -0400, Roy Vestal wrote:
> > > > I'm getting an error starting Jack in my KDE environment. This is a
> > > > new install/build of FC3 and I'm wondering if ARTS is turned on. I'm
> > > > assuming this would be the cause of my Jack start errors. I believe
> > > > the error is "jackd could not start hw:0 in use". At the time of this
> > > > writing I am not able to get to the machine for the exact error.
> > > >
> > > > My question: Can ARTS be active and jackd still work or does it need
> > > > to be off? I'm assuming off is the correct answer at this time.
> > >
> > > Jack normally takes complete ownership of the sound card, all other
> > > programs that use it have to be "off".
> >
> > Hi Fernando. I've just tried to recreate this problem on 2 different
> > machines running FC3. The Arts sound server is running, I ran a live
> > audio stream from bbc.co.uk, using embedded realplayer in Firefox, and
> > played a cd through KsCD at the same time, and jackd started through
> > qjackctl with no error messages. That was with both the vanilla
> > kernel-2.6.9-1.667 (with realtime unchecked, otherwise you get an
> > unrelated error message) , and with
> > kernel-2.6.11-0.3.rdt.rhfc3.ccrma.
>
> Which soundcard?

Testing out with FC3, both the Audigy2 soundblaster (emu10k1), and the 
Ensoniq(ens1371) give no problems. On the machine with the Ensoniq card, 
running FC3, I can run a live audio stream, start jackd, and it gives no 
errors, and with the Arts server running. But FC2 can play multiple streams 
on the machine with the Audigy2 soundblaster card, but not on the machine 
with Ensoniq. That is testing with both kernel-2.6.10.04.rdt.rhfc2.ccrma, and 
th original vanilla kernel-2.6.5-1.358.

Both machines are fully updated, including fedora-legacy updates.

Nigel.
>
> > With FC2 , and on the machine with Audigy2 soundblaster (emu10k1) there
> > are no problems. I can have the Arts server started, run a live audio
> > stream, and jackd will start with no errors. On the other machine with
> > the Ensoniq (ens1371), If I have a live audio stream running, jackd won't
> > start, with the hw0 is in use error. Likewise if I have the Arts server
> > running.
> >
> > This is sort of sounding like a sound card problem with certain distro's.
> > FC3 is ok, both with Audigy2 soundblaster (emu10k1), and Ensoniq
> > (ens1371), but, FC2 gives no errors with the machine with Audigy2
> > soundblaster, but gives jackd errors (hw0 in use) on the machine with
> > Ensoniq card.
>
> That last one makes sense, the Audigy2 can play multiple streams
> simultaneously _in hardware_ (so you can "open" it multiple times). The
> Ensoniq can't.
>
> -- Fernando
>
> > Roy. What is the soundcard on your machine?
> >
> > My machines:
> > I-friend 1.3Ghz celeron, 1GB RAM, Audigy2 soundblaster sound card.
> > Gateway 500, pentium 3 katmai, 256MB RAM, Ensoniq sound card (ens1371).
> >
> > Just another spanner in the works. Nigel.