I'm having problems with DIO errors and glitchy audio with PD-extended
0.41.4
My computer is an HP Compaq nc6000 1.6Ghz laptop with 500mb RAM and I'm
running Ubuntu 9.04.
The kernel is 2.6.28-13-generic and I've tried using the realtime kernel
which is 2.6.28-3-rt but it's no different. I've tried editing
/etc/security/limits.conf to include the lines:

@audio - rtprio 99
@audio - nice -19
@audio - memlock unlimited

but this hasn't helped either.

I start jack with qjackctl and my settings are:

Realtime, No Memory Lock, Frames/Periods: 1024 sample rate 44100,
Periods/Buffer: 2,.

Can anyone help?

If you installed Intrepid or Jaunty from scratch, there is no audio group created by default and the limits.conf additions won't work.  Add an audio group and add your user to it.  Running pd or jack in realtime should work.  I had smooth performance on my old Thinkpad T42 with comparable specs.


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Dan Wilcox
danomatika.com
robotcowboy.com