2.4.20 reboots instantly?

[Jepri]

> 
> 2.2.20 boots just fine, and 2.4.20 is using a kernel config which
> worked
> fine on other machines. I have run /sbin/lilo and all that.
> 
> Any hints as to where to even start debugging this?

The one time this happened to me, I discovered I was trying to run a 
Pentium 4 kernel on an AMD machine.  But since you are almost certainly 
above such mistakes, you could try debugging it using either user mode 
linux or bochs.

Cheers,
Jeremy