Hi On ALSA 0.9.4 and JACK 0.74.0 I get: [avp@avp avp]$ jackstart -v -R -d alsa -d emu10k1 -H jackd 0.74.0 Copyright 2001-2003 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 1827 waiting for signals JACK compiled with System V SHM support capabilities: =i cap_setpcap,cap_ipc_lock,cap_sys_nice,cap_sys_resource+ep loading driver .. new client: alsa_pcm, id = 1 type 1 @ 0x8058648 fd = -1 creating alsa driver ... emu10k1|emu10k1|1024|2|48000|hwmon|swmeter|rt jackstart: pcm.c:689: snd_pcm_nonblock: Assertion `pcm' failed. received signal 6 during shutdown (ignored) Something must have been screwed. But what? :-( Any ideas will be appreciated very much!