amd64 problems related to interrupts on recent 6-c

[Divacky Roman]

hi

I've just upgraded my amd64 (nforce3 at msi, award bios) from 5.3R (which worked
almost fine, except acpi) to 6-c.

6-c tells me about stray irq7 and then silences this output because there is
too many such messages. and input from keyboard is VERY slow...

because 5.3R didnt show this behaviour I think something broke since then

I can provide any info you'll ask for

roman