kldstat hangs in 8.3

Hi,

my sound just stopped working. Dmesg says:

pcm0: chn_write(): pcm0:virtual:dsp0.vp0: play interrupt timeout, channel dead

I am used to this. I unload the sound module and load it again and the problem is solved. As the unloading did not work, I did this here:

AMD620:///home/erich (root) > kldstat
Id Refs Address            Size     Name

The console hangs then in this state forever.

I am not able to stop it with control C.

What could I prepare if this happens again to help debugging?

Erich