Hi, The kernel not detecting my dual core pentium when ACPI was enabled, I looked at dmesg and saw: ACPI: BIOS bug: multiple APIC/MADT found, using 0 ACPI: If "acpi_apic_instance=2" works better, notify linux-acpi@xxxxxxxxxxxxxxx I therefore tried that and my two cores are now detected properly. So I'm notifying you. Hope this helps. Please tell me if you need more info. Fred -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html