[linux-audio-user] Jack server outputs no sound

Ismael Valladolid Torres ivalladt at punkass.com
Thu Feb 2 06:44:37 EST 2006


I download a test WAV file testing.wav. ALSA here seems to be working
nicely, as I can hear the test sound using aplay.

I try to do the same using jackd. I start it as:

$ jackstart -d alsa

And from another shell I do and get:

$ jack.play testing.wav
jack.play: sample rate of file not that of server

Let's assume this is correct. So I stop jackstart and run it again
like this:

$ jackstart -v -d alsa -r 11025 -S

Then jack.play doesn't give any error but I can hear no sound. Find
attached jackstart's stderr output.

This computer is a Dell Latitude D610 laptop with an Intel ICH6 AC'97
audio controller running Debian sid and a 2.6.15.2 kernel with
preemption enabled and the realtime module loaded. Summarizing, ALSA
outputs sound, but jackd through ALSA doesn't.

I got here since I noticed that fluidsynth played MIDI files using
ALSA but not using jackd. Then I discarded a fluidsynth issue.

Any ideas?

Cordially, Ismael
-- 
Dropping science like when Galileo dropped his orange

     http://lamediahostia.blogspot.com/
     http://www.flickr.com/photos/ivalladt/
-------------- next part --------------
back from read, ret = 1 errno == Success
getting driver descriptor from /usr/lib/libjack0.100.0-0/jack_alsa.so
getting driver descriptor from /usr/lib/libjack0.100.0-0/jack_dummy.so
getting driver descriptor from /usr/lib/libjack0.100.0-0/jack_oss.so
JACK compiled with System V SHM support.
server `default' registered
loading driver ..
apparent rate = 11025
configuring for 11025Hz, period = 1024 frames, buffer = 2 periods
nperiods = 2 for capture
nperiods = 2 for playback
5823 waiting for signals
registered builtin port type 32 bit float mono audio
capabilities: = cap_setpcap,cap_ipc_lock,cap_sys_nice,cap_sys_resource+eip
new client: alsa_pcm, id = 1 type 1 @ 0x8058910 fd = -1
new buffer size 1024
registered port alsa_pcm:capture_1, offset = 4096
registered port alsa_pcm:capture_2, offset = 8192
registered port alsa_pcm:playback_1, offset = 0
registered port alsa_pcm:playback_2, offset = 0
++ jack_rechain_graph():
client alsa_pcm: internal client, execution_order=0.
-- jack_rechain_graph()
load = 0.0065 max usecs: 12.000, spare = 92867.000
load = 0.0097 max usecs: 12.000, spare = 92867.000
load = 0.0092 max usecs: 8.000, spare = 92871.000
load = 0.0062 max usecs: 3.000, spare = 92876.000
load = 0.0047 max usecs: 3.000, spare = 92876.000
load = 0.0040 max usecs: 3.000, spare = 92876.000
load = 0.0047 max usecs: 5.000, spare = 92874.000
new client: jack.play-5828, id = 2 type 2 @ 0xb64e1000 fd = 10
registered port jack.play-5828:out_1, offset = 12288
++ jack_rechain_graph():
client alsa_pcm: internal client, execution_order=0.
client jack.play-5828: start_fd=5, execution_order=0.
client jack.play-5828: wait_fd=7, execution_order=1 (last client).
-- jack_rechain_graph()
load = 0.0217 max usecs: 36.000, spare = 92843.000
load = 0.0302 max usecs: 36.000, spare = 92843.000
++ jack_rechain_graph():
client alsa_pcm: internal client, execution_order=0.
-- jack_rechain_graph()
removing disconnected client jack.play-5828 state = Finished errors = 0
removing client "jack.play-5828"
removing client "jack.play-5828" from the processing chain
++ jack_rechain_graph():
client alsa_pcm: internal client, execution_order=0.
-- jack_rechain_graph()
load = 0.0297 max usecs: 27.000, spare = 92852.000
load = 0.0294 max usecs: 27.000, spare = 92852.000
jack main caught signal 2
starting server engine shutdown
stopping driver
unloading driver
freeing shared port segments
stopping server thread
last xrun delay: 0.000 usecs
max delay reported by backend: 0.000 usecs
freeing engine shared memory
max usecs: 36.000, engine deleted
no message buffer overruns
cleaning up shared memory
cleaning up files
unregistering server `default'


More information about the Linux-audio-user mailing list