[LAD] connect(2) call to /dev/shm/jack-0/default/jack_0 failed (err=No such file or directory) (again...)

[Fokke de Jong]

Hi all,

Sorry to bother you again with this. I’m running into the same problem again as before (see the latter part of the [LAD] jackd not using jackdrc… thread).
And apparently my last fix involved some magic rather than replicable logic… :-( i.e. the problem seems to have disappeared on that system, without knowing exactly why)

Now I am installing my jack client again on another fresh install of ubuntu 17.04. and a get the same error.

I have installed jackd1, to be exact, these packages are current.

jackd/artful,artful,now 5 all [installed,automatic]
jackd1/artful,now 1:0.125.0-2 amd64 [installed]
jackd1-firewire/artful,now 1:0.125.0-2 amd64 [installed,automatic]
libjack0/artful,now 1:0.125.0-2 amd64 [installed]
qjackctl/artful,now 0.4.5-1ubuntu1 amd64 [installed,automatic]

when I start my client jackd is automatically started but i get the error:

connect(2) call to /dev/shm/jack-0/default/jack_0 failed (err=No such file or directory)

By browsing the jack sources i found the message seems to come from libjack/client.c in server_connect()

peeking into the /dev/shm directory it seems /dev/shm/jack-0/default/jack_0 is briefly created,but disappears again, presumably just before the client is able to connect.

I have been breaking my head over this, but I really have no clue why this is happening, especially as this has worked fine in the past.

I would really like to know what could possibly cause this error and how to fix it.

thanks,
fokke

[Fokke de Jong]

Does anyone have an idea what causes error?
I don’t really know what option to try anymore.

is the ubuntu package broken? should I build libjack myself?
Can someone with more knowledge of jack internals see a what's happening?
Is thus version of libjack somehow incompatible the the server?

your help would be highly appreciated!

cheers,
Fokke

Post by Fokke de Jong
Hi all,
Sorry to bother you again with this. I’m running into the same problem again as before (see the latter part of the [LAD] jackd not using jackdrc… thread).
And apparently my last fix involved some magic rather than replicable logic… :-( i.e. the problem seems to have disappeared on that system, without knowing exactly why)
Now I am installing my jack client again on another fresh install of ubuntu 17.04. and a get the same error.
I have installed jackd1, to be exact, these packages are current.
jackd/artful,artful,now 5 all [installed,automatic]
jackd1/artful,now 1:0.125.0-2 amd64 [installed]
jackd1-firewire/artful,now 1:0.125.0-2 amd64 [installed,automatic]
libjack0/artful,now 1:0.125.0-2 amd64 [installed]
qjackctl/artful,now 0.4.5-1ubuntu1 amd64 [installed,automatic]
connect(2) call to /dev/shm/jack-0/default/jack_0 failed (err=No such file or directory)
By browsing the jack sources i found the message seems to come from libjack/client.c in server_connect()
peeking into the /dev/shm directory it seems /dev/shm/jack-0/default/jack_0 is briefly created,but disappears again, presumably just before the client is able to connect.
I have been breaking my head over this, but I really have no clue why this is happening, especially as this has worked fine in the past.
I would really like to know what could possibly cause this error and how to fix it.
thanks,
fokke