Re: [LAU] Light laptop setup ?

On måndag 28 september 2009 00:48:13 lanas wrote:
> On Mon, 28 Sep 2009 08:30:54 +1000,
>
> M Watts <zwy648rct@email-addr-hidden> wrote :
> > On 09/28/2009 03:36 AM, lanas wrote:
> > ...
> >
> > > 1) What is the most easiest-to-setup MIDI/audio interface for a
> > > laptop ? Fedora 11 will be installed on the laptop.
> >
> > Then easiest would be Planet CCRMA. From a fresh F11 install, I did
> >
> > rpm --import
> > http://ccrma.stanford.edu/planetccrma/RPM-GPG-KEY.planetccrma.txt
> >
> > and
> >
> > rpm -Uvh
> > http://ccrma.stanford.edu/planetccrma/mirror/fedora/linux/planetccrma/11/
> >i386/planetccrma-repo-1.1-2.fc11.ccrma.noarch.rpm
>
> I know. I've tried launching jack (qjackctl) on both F11 x86_64
> worskations and it fails on both, failing to open alsa device or
> something like that. Of course, regular sound works on both machines.
> I bookmarked a cript I think made by Fernando (CCRMA) to be able to
> actually use jacks and I should take a look at it.

Probably something holding your audio device. jackd want to be the sole owner
of the audio device. For me it's always knotify4 (in this version. probably fixed
in recent kde versions, I hope). I check that with lsof. Example:

~/sound/hydrogen> lsof | egrep snd
knotify4 4247 bengan mem CHR 116,4 5186 /dev/snd/pcmC0D0p
knotify4 4247 bengan mem CHR 116,3 5180 /dev/snd/pcmC0D1p
knotify4 4247 bengan 17u CHR 116,3 0t0 5180 /dev/snd/pcmC0D1p
knotify4 4247 bengan 18r CHR 116,2 0t0 4926 /dev/snd/timer
knotify4 4247 bengan 19u CHR 116,4 0t0 5186 /dev/snd/pcmC0D0p
knotify4 4247 bengan 20u CHR 116,8 0t0 5209 /dev/snd/controlC0
knotify4 4247 bengan 22r CHR 116,2 0t0 4926 /dev/snd/timer
knotify4 4247 bengan 23u CHR 116,4 0t0 5186 /dev/snd/pcmC0D0p
knotify4 4247 bengan 24u CHR 116,8 0t0 5209 /dev/snd/controlC0
kmix 4697 bengan 10u CHR 116,8 0t0 5209 /dev/snd/controlC0
pulseaudi 4970 bengan mem REG 8,6 347800 230684 /usr/lib64/libsndfile.so.1.0.17
pulseaudi 4970 bengan 20u CHR 116,8 0t0 5209 /dev/snd/controlC0
qjackctl 28925 bengan 12u CHR 116,9 0t0 7878 /dev/snd/seq

Or simpler:
~/sound/hydrogen> lsof /dev/snd/pcm*
COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
knotify4 4247 bengan mem CHR 116,4 5186 /dev/snd/pcmC0D0p
knotify4 4247 bengan mem CHR 116,3 5180 /dev/snd/pcmC0D1p
knotify4 4247 bengan 17u CHR 116,3 0t0 5180 /dev/snd/pcmC0D1p
knotify4 4247 bengan 19u CHR 116,4 0t0 5186 /dev/snd/pcmC0D0p
knotify4 4247 bengan 23u CHR 116,4 0t0 5186 /dev/snd/pcmC0D0p

Just kill it and try again.

~/sound/hydrogen> killall knotify4
~/sound/hydrogen> lsof | egrep snd
kmix 4697 bengan 10u CHR 116,8 0t0 5209 /dev/snd/controlC0
pulseaudi 4970 bengan mem REG 8,6 347800 230684 /usr/lib64/libsndfile.so.1.0.17
pulseaudi 4970 bengan 20u CHR 116,8 0t0 5209 /dev/snd/controlC0

A bit brutal but it works. It could also be that your trying to start
jackd with realtime priority and don't have a rt-kernel. But I gather
you know that.

/bengan
_______________________________________________
Linux-audio-user mailing list
Linux-audio-user@email-addr-hidden
http://lists.linuxaudio.org/mailman/listinfo/linux-audio-user
Received on Mon Sep 28 12:15:02 2009