As far as I know, jack_test should generally pass, or there's something wrong going on...?
Test result:
kfoltman@ubuntu:~/src/jackmp$ jack_test
Jack server is said being in non-realtime mode...
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*-*-*-*-*-*-*-*-*-*-*-*-*-* Start jack server stress test *-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*
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Cannot connect to server socket err = Connection refused
Cannot connect to server socket
jackdmp 1.90
Copyright 2001-2005 Paul Davis and others.
Copyright 2004-2008 Grame.
jackdmp comes with ABSOLUTELY NO WARRANTY
This is free software, and you are welcome to redistribute it
under certain conditions; see the file COPYING for details
could not open component .so '/usr/local/lib/jack/dummy.so': /usr/local/lib/jack/dummy.so: undefined symbol: _ZN4Jack16JackDriverClient9SetMasterEb
could not open component .so '/usr/local/lib/jack/alsa.so': /usr/local/lib/jack/alsa.so: undefined symbol: _ZN4Jack16JackDriverClient9SetMasterEb
JACK server starting in realtime mode with priority 60
Using ALSA driver USB US-X2Y running on TASCAM US-X2Y (1604:8001 if 0 at 004/003)
ALSA: final selected sample format for capture: 16bit little-endian
ALSA: use 4 periods for capture
ALSA: final selected sample format for playback: 16bit little-endian
ALSA: use 4 periods for playback
jack_client_new: deprecated
cannot create new client; jack_test already exists
Client name = jack_test conflits with another running client
Cannot connect to the server
!!! ERROR !!! Jackd is in a non-expected realtime mode (RT = 0).
error : port_name is empty (msg from callback)
port_name "jack_test:port" already exists
ALSA: final selected sample format for capture: 16bit little-endian
ALSA: use 4 periods for capture
ALSA: final selected sample format for playback: 16bit little-endian
ALSA: use 4 periods for playback
ALSA: final selected sample format for capture: 16bit little-endian
ALSA: use 4 periods for capture
ALSA: final selected sample format for playback: 16bit little-endian
ALSA: use 4 periods for playback
JackGraphManager::Connect already connected port_src = 2 port_dst = 5
!!! ERROR !!! 36 graph reorder callback have been received (maybe non-valid value)...
error : jack_client_new: deprecated (msg from callback)
JackGraphManager::Connect already connected port_src = 5 port_dst = 8
error : jack_port_tie called with ports not belonging to the same client (msg from callback)
!!! WARNING !!! port_name return something while the port have been unregistered !
!!! Name of unregistered port : jack_test:out1b !
!!! ERROR !!! jack_frame_time seems to return incorrect values cur_buffer_size = 128, delta_time = 1
!!! ERROR !!! jack_frame_time seems to return incorrect values cur_buffer_size = 128, delta_time = 87
!!! ERROR !!! jack_frame_time seems to return incorrect values cur_buffer_size = 128, delta_time = 89
!!! ERROR !!! jack_frame_time seems to return incorrect values cur_buffer_size = 128, delta_time = 88
!!! ERROR !!! jack_frame_time seems to return incorrect values cur_buffer_size = 128, delta_time = 88
!!! ERROR !!! jack_frame_time seems to return incorrect values cur_buffer_size = 128, delta_time = 89
!!! ERROR !!! jack_frame_time seems to return incorrect values cur_buffer_size = 128, delta_time = 88
!!! ERROR !!! jack_frame_time seems to return incorrect values cur_buffer_size = 128, delta_time = 88
!!! ERROR !!! jack_frame_time seems to return incorrect values cur_buffer_size = 128, delta_time = 88
!!! ERROR !!! jack_frame_time seems to return incorrect values cur_buffer_size = 128, delta_time = 88
!!! ERROR !!! jack_frame_time seems to return incorrect values cur_buffer_size = 128, delta_time = 88
!!! ERROR !!! jack_frame_time seems to return incorrect values cur_buffer_size = 128, delta_time = 88
!!! ERROR !!! jack_frame_time seems to return incorrect values cur_buffer_size = 128, delta_time = 88
!!! ERROR !!! jack_frame_time seems to return incorrect values cur_buffer_size = 128, delta_time = 87
!!! ERROR !!! jack_frame_time seems to return incorrect values cur_buffer_size = 128, delta_time = 88
!!! ERROR !!! jack_frame_time seems to return incorrect values cur_buffer_size = 128, delta_time = 88
!!! ERROR !!! jack_frame_time seems to return incorrect values cur_buffer_size = 128, delta_time = 89
!!! ERROR !!! jack_frame_time seems to return incorrect values cur_buffer_size = 128, delta_time = 88
!!! ERROR !!! jack_frame_time seems to return incorrect values cur_buffer_size = 128, delta_time = 88
!!! ERROR !!! jack_frame_time seems to return incorrect values cur_buffer_size = 128, delta_time = 87
!!! ERROR !!! jack_frame_time seems to return incorrect values cur_buffer_size = 128, delta_time = 88
!!! ERROR !!! jack_frame_time seems to return incorrect values cur_buffer_size = 128, delta_time = 88
!!! ERROR !!! jack_frame_time seems to return incorrect values cur_buffer_size = 128, delta_time = 88
!!! ERROR !!! jack_frame_time seems to return incorrect values cur_buffer_size = 128, delta_time = 89
!!! ERROR !!! jack_frame_time seems to return incorrect values cur_buffer_size = 128, delta_time = 87
!!! ERROR !!! jack_frame_time seems to return incorrect values cur_buffer_size = 128, delta_time = 88
!!! ERROR !!! jack_frame_time seems to return incorrect values cur_buffer_size = 128, delta_time = 88
!!! ERROR !!! jack_frame_time seems to return incorrect values cur_buffer_size = 128, delta_time = 87
!!! ERROR !!! jack_frame_time seems to return incorrect values cur_buffer_size = 128, delta_time = 89
!!! ERROR !!! jack_frame_time seems to return incorrect values cur_buffer_size = 128, delta_time = 88
!!! ERROR !!! jack_frame_time seems to return incorrect values cur_buffer_size = 128, delta_time = 88
!!! ERROR !!! jack_frame_time seems to return incorrect values cur_buffer_size = 128, delta_time = 88
!!! ERROR !!! jack_frame_time seems to return incorrect values cur_buffer_size = 128, delta_time = 87
!!! ERROR !!! jack_frame_time seems to return incorrect values cur_buffer_size = 128, delta_time = 89
!!! ERROR !!! jack_frame_time seems to return incorrect values cur_buffer_size = 128, delta_time = 88
!!! ERROR !!! jack_frame_time seems to return incorrect values cur_buffer_size = 128, delta_time = 88
!!! ERROR !!! jack_frame_time seems to return incorrect values cur_buffer_size = 128, delta_time = 88
!!! ERROR !!! jack_frame_time seems to return incorrect values cur_buffer_size = 128, delta_time = 87
!!! ERROR !!! jack_frame_time seems to return incorrect values cur_buffer_size = 128, delta_time = 88
!!! ERROR !!! jack_frame_time seems to return incorrect values cur_buffer_size = 128, delta_time = 88
!!! ERROR !!! jack_frame_time seems to return incorrect values cur_buffer_size = 128, delta_time = 88
!!! ERROR !!! jack_frame_time seems to return incorrect values cur_buffer_size = 128, delta_time = 88
!!! ERROR !!! jack_frame_time seems to return incorrect values cur_buffer_size = 128, delta_time = 88
!!! ERROR !!! jack_frame_time seems to return incorrect values cur_buffer_size = 128, delta_time = 88
!!! ERROR !!! jack_frame_time seems to return incorrect values cur_buffer_size = 128, delta_time = 87
!!! ERROR !!! jack_frame_time seems to return incorrect values cur_buffer_size = 128, delta_time = 88
!!! ERROR !!! jack_frame_time seems to return incorrect values cur_buffer_size = 128, delta_time = 88
!!! ERROR !!! jack_frame_time seems to return incorrect values cur_buffer_size = 128, delta_time = 88
!!! ERROR !!! jack_frame_time seems to return incorrect values cur_buffer_size = 128, delta_time = 87
!!! ERROR !!! jack_frame_time seems to return incorrect values cur_buffer_size = 128, delta_time = 88
!!! ERROR !!! jack_frame_time seems to return incorrect values cur_buffer_size = 128, delta_time = 88
!!! ERROR !!! jack_frame_time seems to return incorrect values cur_buffer_size = 128, delta_time = 88
!!! ERROR !!! jack_frame_time seems to return incorrect values cur_buffer_size = 128, delta_time = 88
!!! ERROR !!! jack_frame_time seems to return incorrect values cur_buffer_size = 128, delta_time = 88
!!! ERROR !!! jack_frame_time seems to return incorrect values cur_buffer_size = 128, delta_time = 90
!!! ERROR !!! jack_frame_time seems to return incorrect values cur_buffer_size = 128, delta_time = 88
!!! ERROR !!! jack_frame_time seems to return incorrect values cur_buffer_size = 128, delta_time = 88
!!! ERROR !!! jack_frame_time seems to return incorrect values cur_buffer_size = 128, delta_time = 87
!!! ERROR !!! jack_frame_time seems to return incorrect values cur_buffer_size = 128, delta_time = 88
!!! ERROR !!! jack_frame_time seems to return incorrect values cur_buffer_size = 128, delta_time = 88
!!! ERROR !!! jack_frame_time seems to return incorrect values cur_buffer_size = 128, delta_time = 88
!!! ERROR !!! jack_frame_time seems to return incorrect values cur_buffer_size = 128, delta_time = 87
!!! ERROR !!! jack_frame_time seems to return incorrect values cur_buffer_size = 128, delta_time = 88
!!! ERROR !!! jack_frame_time seems to return incorrect values cur_buffer_size = 128, delta_time = 88
!!! ERROR !!! jack_frame_time seems to return incorrect values cur_buffer_size = 128, delta_time = 88
!!! ERROR !!! jack_frame_time seems to return incorrect values cur_buffer_size = 128, delta_time = 88
!!! ERROR !!! jack_frame_time seems to return incorrect values cur_buffer_size = 128, delta_time = 88
!!! ERROR !!! jack_frame_time seems to return incorrect values cur_buffer_size = 128, delta_time = 88
error : Cannot read socket fd = 3 err = Invalid argument (msg from callback)
error : Could not read result type = 24 (msg from callback)
no message buffer overruns
!!! ERROR !!! jack_client_close does not return 0 for client1 !
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