[LAU] repeatable jack related segfaults

Julien Claassen julien at c-lab.de
Mon Sep 6 16:08:57 UTC 2010


Hello everyone!
   I'm experiencing trouble with jack and multiple servers. The moment I start 
a second jackserver (for net I/O) and try:
jack_lsp -s new_name
   jack_lsp segfaults.
   If I start jack_netsource first (by accident or should it be that way?) and 
then start jackd for net I/O, I get a segfault from the new jackd.

jackd -N new_name -dnet -r16000 -b8 -i1 -o1 -I0 -O0 -l 5222
[...]
creating net driver ... net_pcm|16000|1024|5222|1|1|transport_sync:1
bind error
netjack: period   : up: 0 / dn: 0
netjack: framerate: 16000
netjack: audio    : cap: 1 / pbk: 1)
netjack: midi     : cap: 0 / pbk: 0)
netjack: buffsize : rx: 0)
[165384.703633] jackd[21189]: segfault at 8 ip b804f24b sp b6a572c0 error 4 in 
j
ack_net.so[b804a000+a000]
Segmentation fault

   If I start the jackd first and then type jack_lsp -s new_name
[165501.994692] jack_lsp[21200]: segfault at 0 ip 08049078 sp bfea7c50 error 4 
i
n jack_lsp[8048000+2000]
Segmentation fault

   I'm running jackd version 0.119.0 (from svn), a 2.6.30.4 kernel with 
lowlatency options chosen (no patches though) and if that is of any importance 
ALSA version 1.0.20.
   Can someone help here?
   Kindly yours
          Julien



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