High load average (~2.0) on an idle PowerPC 64 machine

[Romain Goyet]

I there,

 I've this Quad G5 machine that's sitting pretty much idle with the
latest Debian stable installed, and yet it's got an abnormaly high
load average.
I've detailed the situation over here, maybe you guys will find it
interesting or have something to say :
http://serverfault.com/questions/251299/high-load-average-over-2-0-on-an-idle-machine

The machine doesn't seem to be actually slowed down, it looks more
like an incorrect measurement.

Thank you very much for any help !

 - Romain