So here I was installing OpenBSD 4.5 amd64 on some HP DL386’s with.. AMD Opterons, and during the install it crashed out with the error message:

fatal machine check in supervisor mode
trap type 18 code 0 rip……….

And odds are if you may be here for the same thing, as google came up with 0 hits on fatal machine check in supervisor mode.

Nothing.

Nill.

But I’ve got a crash screen to prove it.

Now here is a kicker, I found in the bios if you turn off the “Page directory cache”, for “older Linux kernels”, you can complete your install!!

The downside, is that a dmesg causes a kernel fault.

Sigh.

So annoying.