snd_ich performance issues on 5.3 release

[charles]

Hi,

I recently just downloaded and installed a fresh copy of freebsd 5.3 release.

I have tried getting sound on my laptop (targa p4 M 2ghz- don't know
the exact model name).
using kldload as wellas compiling
device sound
and
device snd_ich 
in my kernel.

The sound works. However, if the sound modules are enabled the performance
of the entire system drops dramatically. It feels like
everything is chugging as if its using alot of CPU. It goes back to normal 
as soon as I unload the sound driver.

MY sound used to work perfectly in 4.8 4.9 4.10 5.2 and 5.2.1.
So I'm not sure whats happening to cause this problem?

Any ideas??

Charles