On Sat, Apr 19, 2003 at 08:32:34AM +0200, Volker Borchert wrote:
> cpu0: NMI: system interrupts: 40000000<VME=0,SBUS=0,ME>
> panic: lockmgr: no context

This looks like you got a NMI interrupt in an interrupt handler, so the 
"lockmgr: no context" is just a secondary effect.

I would suspect hardware problems. Try re-seating the SBUS cards and the
memory first. I've seen this with half-inserted SBUS cards.

Martin