Hey there!
I just got a brand new Thinkpad x230, installed Ubuntu 12.04. I've been cracking my head on it for the past two days, the gui is running smoothly and seems to receive input, but I simply cannot get any sound to come out of pd-extended.

I'm using alsa, hope that's ok. I have tried using jack to get it working, but I'm having way too much trouble getting jack to work and it's blurring the source of the problem for me.

Here's what I'm getting for output.

I run with

sudo pd-extended

Immediately I get the following:

couldn't open MIDI input device 0
couldn't open MIDI output device 9
opened 0 MIDI input device(s) and 0 MIDI output device(s).
ALSA output error (snd_pcm_open): Device or resource busy

I check DSP and the box by in/out, then go to test audio and midi, and turn the sound up to 60.

Then silence. Nothing.

In my terminal window I get the following output:
oops: ALSA cards not reported in order?
oops: ALSA cards not reported in order?
priority 6 scheduling enabled.
priority 8 scheduling enabled.
open: /etc/pd/gem.conf: No such file or directory
open: /home/gabriel/.pd/gem.conf: No such file or directory
open: ./gem.conf: No such file or directory

Layman's terms please, I'm beginner/intermediate with linux but completely new to audio programming. I know I can gather the enthusiasm to tweak with jack and learn how this is actually working once I've actually played with pd and started enjoying the crap out of it.

Thanks so much in advance!

I installed pd-extended using these instructions if it's significant:

http://puredata.info/docs/faq/debian