Btw, this is the complete error. Jan 16 07:03:23 server kernel: irq 177: nobody cared (try booting with the "irqpoll" option) Jan 16 07:03:23 server kernel: [<c044d886>] __report_bad_irq+0x2b/0x69 Jan 16 07:03:23 server kernel: [<c044da73>] note_interrupt+0x1af/0x1e8 Jan 16 07:03:23 server kernel: [<c044d081>] handle_IRQ_event+0x45/0x8c Jan 16 07:03:23 server kernel: [<c044d163>] __do_IRQ+0x9b/0xd6 Jan 16 07:03:23 server kernel: [<c044d0c8>] __do_IRQ+0x0/0xd6 Jan 16 07:03:23 server kernel: [<c040749e>] do_IRQ+0x99/0xc3 Jan 16 07:03:23 server kernel: [<c0405946>] common_interrupt+0x1a/0x20 Jan 16 07:03:23 server kernel: [<c05302c0>] acpi_processor_idle_simple+0x0/0x254 Jan 16 07:03:23 server kernel: [<c052fc0b>] acpi_safe_halt+0x14/0x20 Jan 16 07:03:23 server kernel: [<c0530367>] acpi_processor_idle_simple+0xa7/0x254 Jan 16 07:03:23 server kernel: [<c053007b>] acpi_processor_get_power_info+0x464/0x510 Jan 16 07:03:23 server kernel: [<c0403ca8>] cpu_idle+0x9f/0xb9 Jan 16 07:03:23 server kernel: ======================= Jan 16 07:03:23 server kernel: handlers: Jan 16 07:03:23 server kernel: [<c058afd1>] (usb_hcd_irq+0x0/0x50) Jan 16 07:03:23 server kernel: [<f8964b7f>] (e1000_intr+0x0/0x10b [e1000]) Jan 16 07:03:23 server kernel: Disabling IRQ #177 In case again anyone is interested. I just tried updating the bios, if it freezes again I will boot with acpi=off and then retest. ------------ acpi=off in the kernel options has allowed the machine to run for over 12 hours without crashing, we'll see what happens. doesn't seem like a hardware problem. thanks, -Drew