Unable to boot because of oops

["Eric Leblond" <eric@regit.org>]

Hi,

I've to install a debian on a dual-cpu 728m ram powerG4 (brand new).
I'm unable to boot with the debian kernel (stable and testing kernel)
Each time, I get a
  "L2 data parity cache error"
and an oops follow.
I've boot with no options till
  "video=ofonly mem=728 nosmp"
(also try maxcpus)
I don't know well MacOS 9.2 but on this computer it is very unstable (uptime
10 min of action)
Can it really be an hardware problem ?
(I've got two of this G4 same problem on both, mdk kernel boot fine)
Any idea ?

Thanks for any help