I'm having sound problems ever since I installed Virtualbox, which persisted
even after I removed it. My on board sound card is just being found. I've
even tried 2 other sound cards and they also are just not detected. I
vaguely remember something about 64 bit during the install and may have
chosen the wrong option then as it's an AMD 64 3000+ CPU.

My lshw shows the sound card as "UNCLAIMED" - what is that all about?

*-multimedia UNCLAIMED
description: Multimedia audio controller
product: IXP SB400 AC'97 Audio Controller
vendor: ATI Technologies Inc
physical id: 14.5
bus info: pci@0000:00:14.5
version: 01
width: 32 bits
clock: 66MHz
capabilities: bus_master cap_list
configuration: latency=64 mingnt=2

I've tried modprobe but it doesn't respond to any names I've tried.

Can you help? When I boot with a live CD it still works. I'm on 8.04 but
will be installing the next version in a week or so when it becomes
available and I'm sure that will fix it as it was working fine before.
That's not the solution I want though. I'd far rather lean what's going on
and how to fix it!