Can not start JACK audio connection kit

English Multimedia
#1

Hi

I can’t start Jack it comes up with the following msg

10:31:36.276 Patchbay deactivated.
10:31:36.277 Statistics reset.
10:31:36.278 ALSA connection change.
10:31:36.287 JACK is starting…
10:31:36.287 jackdmp -P80 -u -dalsa -dhw:0 -r48000 -p128 -n2 -m -H -M -Xseq
Cannot connect to server socket err = No such file or directory
Cannot connect to server request channel
jack server is not running or cannot be started
Cannot connect to server socket err = No such file or directory
Cannot connect to server request channel
jack server is not running or cannot be started
10:31:36.337 ALSA connection graph change.
10:31:36.348 Could not start JACK. Sorry.
10:32:17.050 JACK was stopped
10:32:19.497 JACK is starting…
10:32:19.497 jackdmp -P80 -u -dalsa -dhw:0 -r48000 -p128 -n2 -m -H -M -Xseq
Cannot connect to server socket err = No such file or directory
Cannot connect to server request channel
jack server is not running or cannot be started
10:32:19.549 Could not start JACK. Sorry.
10:32:21.394 JACK was stopped

Has anyone an idea what might be missing ?

Thanks for your help

#2

You either need to remove pulse audio or add the pulseaudio-module-jack library I believe

#3

I did in stall pulseaudio-jack. But you are right, pulseaudio may play a role. I need to investigate further since my audio does not work when playing mp4 or fly.

The whole thing started when I was trying to install a tv-- card which I gave up on. I’ll keep you posted.

thanks

#4

So, I got my sound back by deleting some of the packages which were specific to the tv-card.

But still can not start jackd trying a number of setup configuration. The re-occoring error in the error msg

08:11:37.617 JACK is starting…
08:11:37.618 jackdmp -P80 -u -dalsa -dhw:0 -r48000 -p128 -n2 -m -H -M -Xseq
Cannot read socket fd = 15 err = Success
CheckRes error
JackSocketClientChannel read fail
Cannot open qjackctl client
08:11:37.658 Could not start JACK. Sorry.
08:24:16.688 JACK was stopped

is

Cannot read socket fd = 15 err = Success
CheckRes error

I wonder what “socket fd” is referring to

Any idea ?

Thanks otto_oz

By the way, how could I disable pulseaudio for testing purposes ?

#5

In Yast -sound card

Bottom right bottom there is an option to turn off pulse

#6

Found it and tested it did not make any difference. I seemed to have here multiple problems . Normally qjackctl started started automatically when opening my sound application Ardour. besides the fact that jack should start on its own I may also have a problem with my sound card M-audio 1010LT. Just to narrow down on the issue, What tests could I run to verify if the card works. All the drivers are in yast and it was working before. What I dont get in yast is a test sound ?1?

I am puzzled as to what to do next, I changed the card from primary and scondary, did even physically uninstall the card and put it in a different slot .???

Thanks for your help
otto_oz

#7

I ran the following test

hase@linux-k5tf:~> aplay -vv /usr/share/sounds/alsa/test.wav
ALSA lib pcm_dmix.c:1022 snd_pcm_dmix_open) unable to open slave
aplay: main:722: audio open error: Device or resource busy
hase@linux-k5tf:~>

What does this indicate?

#8

Means some other process has grabbed the actual /dev file. You can use lsof to see what process ID has the snd file

Note if pulse is running it is grabs the sound device file like wise other sound systems. Also some old programs may grab the hardware directly also rather then going through the sound control system which ever you are using.