Thanks for answering, Source master...

I am not in cases pointed by Derek's list.
Others sound applications are working very well.

I've tried to resolve this problem upgrading my Edgy to a brand new Festy... useless.

If the trouble comes from ALSA setting up, I have no idea how to configurate it to avoid this problem.

any idea ?

Hello,

I have the same lag troubles under Edgy 2.6.17.11

My sound card is a "Intel Corporation 82801 (ICH7 Family) High Definition Audio Controller (rev01)" on my laptop (Dell Inspiron 9400)

I've got the same "Pd: system call timed out".

"ls -l /dev/dsp" gives me:
crw-rw----- 1 root audio 14, 3 4 apr 20:32 /dev/dsp

I did what arky suggested (chmod ...) but this is useless.

"pd -noadc" works perfectlly (with no sound of course)
"pd -alsa" gives me "audio I/O stuck... closing audio"

Need help !