Dear linux-smp@vger.rutgers.edu, As instructed by your code, I'm sending you my /var/log/dmesg file with some IOAPIC error messages (as an attachment) I'm running a kernel 2.2.16-3smp with dual Pentium III with SuperMicro PIIIDME motherboard. Please let me know if I can provide any additional information you might need. Thanks. Andrei Mushinski.