On Mon, Oct 03, 2005 at 07:34:48PM +0100, David Brownlee wrote:
> 	Hum.. UP kernel & machine this end. (...)

Ah ok. "damn".

>   (...)
> 	What audio driver do you have - this machine has an eap.
> 	I'm wondering if some audio drivers are more susceptible to
> 	the effects of this...

I'm using a ...

emuxki0 at pci0 dev 3 function 0: vendor 0x1102 product 0x0002 (audio multimedia, revision 0x05)
emuxki0: ac97: TriTech TR28602 codec; no 3D stereo
audio0 at emuxki0: full duplex, mmap, independent
emuxki0: interrupting at ioapic1 pin 4 (irq 10)

... but probably I'm seeing this because of a whole different
reason than you do (i.e. some SMP issue on my machine).

Regards,

-Martin