Hello,

the raspberry image from Satellite CCRMA doesn´t work well with my Rasberry PI Rev. B and the usb sound card Griffin iMic.

If I boot up with the usb sound card inserted and start pure data afterwards, pure data and the whole raspberry OS freezes.

In the terminal I get the following notification:

watchdog: signaling pd...

This message comes every second until I reboot the raspberry.

If I first boot up with no sound card inserted, start pure data and then insert the sound card, I can use it with no problems for a while. But if I load a new patch or do anything else, pure data freezes again. The freezes are intermittent. I can´t see any regularity.

I tried to work with an wheezy image and pure data extended, but the behavior is very similar…

Do you have any suggestions how to solve this problem? Or do you have any ideas what the reasons for the freezes are?

I saw some examples with the same setup that worked without any problems. So I guess it should work in general…

Thanks

Did you lower USB-speed, yet?
In /boot/cmdline.txt :
dwc_otg.speed=1

http://wiki.linuxaudio.org/wiki/raspberrypi

If your soundcard can't work with USB1.1, you can't use it. Raspberry Pi doesn't work well with USB2.0 Soundcards.
There is an USB-Audio-Fix you could try. (But it doesn't work for me)

http://www.raspyfi.com/raspberry-pi-usb-audio-fix/

(the instructions on this site are old, the fix is included in the "next"-branch, not "fiq_split"-branch:)

sudo apt-get install git-core
sudo wget http://goo.gl/1BOfJ -O /usr/bin/rpi-update && sudo chmod +x /usr/bin/rpi-update
sudo BRANCH=next rpi-update

best regards