Hi, i had similar problems on Jaunty and i solved everything with this tutorial:

http://ubuntuforums.org/showthread.php?t=1130384

it's pretty complete. On my machine every application uses now Pulseaudio mixer, except Pd which makes happily use of Jack. Starting qjackctl from terminal (before using pd) terminate automatically Pulseaudio - avoiding *snd_pcm_open (output): Device or resource busy*. Once you close jack Pulseaudio will be initialize again automatically when another application ask for it.

hope this help..

M

Message: 5 Date: Thu, 3 Sep 2009 21:40:48 -0000 (AZOST) From: gnd@itchybit.org Subject: [PD] Ubuntu. PD, Pulseaudio problems To: pd-list@iem.at Message-ID: 62317.92.52.2.85.1252014048.squirrel@mail.itchybit.org Content-Type: text/plain;charset=iso-8859-1

hello,

im using Ubuntu Jaunty and have problems with sound in PD 0.41.4-extended when using simultaneously Firefox and/or Audacious.

If i start PD sooner then firefox and audacious, they dont make any sounds but sound in pd works ok. If i start PD later, firefox and audacious work fine, but sound in PD gets stuck with: snd_pcm_open (output): Device or resource busy (in the shell) audio I/O stuck... closing audio (in pd console)

Both FF and Audacious are using the pulseaudio server. I tried to create a /etc/asound.conf, to create a new device:

pcm.pulse { type pulse } ctl.pulse { type pulse } pcm.!default { type pulse } ctl.!default { type pulse }

and use it with pd -alsa -alsaadd pulse, but the audio output in pd still doesnt work when running some other sound applications. When running pd alone like this, the sound is severely garbled and after a while it hangs the same...

Is there some normal way how to handle this ? I mean it should not be a problem using several application at once but apparently pd has some problems with it..

Thanks for any advices..

gnd/