Messages in this thread | | | Date | Mon, 20 Jan 2003 19:43:54 -0600 (CST) | From | Coax <> | Subject | Re: Spurious 8259A interrupt: IRQ7 ???? |
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Have seen this problem with a motherboard with a bad PCI slot, too. happened with a pci network card in the slot...
Chad Schwartz CornerNet System Administration
On Mon, 20 Jan 2003, David D. Hagood wrote:
> AnonimoVeneziano wrote: > > What does it mean this message? > > > > Of what problem is the signal? > > It is most likely a hardware problem. > > When a device signals an interrupt, it asserts its interrupt pin. When > the CPU asks the interrupt controller what device generated the > interrupt, the interrupt controller tells the CPU. > > But if the interrupt line "goes away" before the CPU fetches the vector, > then the interrupt controller doesn't "know" what IRQ caused the > interrupt. So the interrupt controller sends an IRQ #7 to the CPU, along > with setting a bit in the interrupt controller's status register that > says in effect "this isn't really an IRQ 7, but I have no idea what it > was. Sorry." > > If you have ISA cards in your system, remove them from the system and > re-insert them (with the power off, of course) - they may have developed > some oxidization on the card edge connector. You can also try scrubbing > the card edge with some plain paper (a US dollar bill works even better, > but you might not have access to dead presidents in Italy.) > > Ditto with PCI cards - remove them, polish the connector, then re-insert > them. > > > - > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/ >
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