I have this message on one of my servers. The only thing that is different on this server is that it has an external usb drive connected to it. It seems to abend randomly, during the night, during the day, etc...

Typed display interrupts

get this:

Interrupt 40: ACPIDRV.PSM Allocated Bus Interrupt 708
Interrupt Handler: Spurious Interrupts 1
Interrupt Handler: USB UHCI Controller 0
Interrupt Handler: USB EHCI Controller 743

Could this usb drive be causing this?