With 2.4.18-0.40smp, the clock on this machine runs (roughly) twice as fast.
If booted with 'noapic', it works OK.
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Ingo: could this be that the timer irq is routed to 2 cpu's ?
Can we close this out now?
Well, depends how well the current kernel works on this box. Haven't tried recently.
Deferred, I think that box is dead.