I asked "rob.geelen" <rob.geelen@freeler.nl> to follow-up after we corresponded privately and located the problem. That didn't happen, so here is the summary: Hardware problem, likely a dirty PCI connector. Donald Becker becker@scyld.com Scyld Computing Corporation http://www.scyld.com 410 Severn Ave. Suite 210 Second Generation Beowulf Clusters Annapolis MD 21403 410-990-9993