user@host:~$ jackd -v -R -d alsa 
getting driver descriptor from /usr/local/lib/jack/jack_alsa.so
getting driver descriptor from /usr/local/lib/jack/jack_dummy.so
getting driver descriptor from /usr/local/lib/jack/jack_oss.so
jackd 0.105.1
Copyright 2001-2005 Paul Davis and others.
jackd 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

JACK compiled with System V SHM support.
server `default' registered
loading driver ..
creating alsa driver ... hw:0|hw:0|1024|2|48000|0|0|nomon|swmeter|-|32bit
control device hw:0
configuring for 48000Hz, period = 1024 frames, buffer = 2 periods
ALSA: final selected sample format for capture: 16bit little-endian
ALSA: use 2 periods for capture
ALSA: final selected sample format for playback: 32bit little-endian
ALSA: use 2 periods for playback
9647 waiting for signals
registered builtin port type 32 bit float mono audio
registered builtin port type 8 bit raw midi
clock source = system clock via clock_gettime
new client: alsa_pcm, id = 1 type 1 @ 0x805b810 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 = 0.0375 max usecs: 16.000, spare = 21317.000
load = 0.0563 max usecs: 16.000, spare = 21317.000
load = 0.0680 max usecs: 17.000, spare = 21316.000
load = 0.0691 max usecs: 15.000, spare = 21318.000
load = 0.0744 max usecs: 17.000, spare = 21316.000
load = 0.0747 max usecs: 16.000, spare = 21317.000
load = 0.0772 max usecs: 17.000, spare = 21316.000
load = 0.0784 max usecs: 17.000, spare = 21316.000
load = 0.0767 max usecs: 16.000, spare = 21317.000
load = 0.0993 max usecs: 26.000, spare = 21307.000
load = 0.0848 max usecs: 15.000, spare = 21318.000
load = 0.0893 max usecs: 20.000, spare = 21313.000
load = 0.0751 max usecs: 13.000, spare = 21320.000
load = 0.0797 max usecs: 18.000, spare = 21315.000
load = 0.0774 max usecs: 16.000, spare = 21317.000
jack main caught signal 2
starting server engine shutdown
load = 0.0856 max usecs: 20.000, spare = 21313.000
load = 0.0850 max usecs: 18.000, spare = 21315.000
stopping driver
unloading driver
freeing shared port segments
stopping server thread
stopping watchdog thread
last xrun delay: 0.000 usecs
max delay reported by backend: 0.000 usecs
freeing engine shared memory
max usecs: 26.000, engine deleted
no message buffer overruns
cleaning up shared memory
cleaning up files
unregistering server `default'