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SubjectRe: Unexpected IRQ trap at vector 20
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> etc, plugging in the power (while the system was running on battery - this 
> causes the CPU to step up to 700MHz from 550MHz) causes the system to freeze
> in every way (including SysRq), while continuously spitting out "Unexpected
> IRQ trap at vector 20" on the serial console.

Thats the laptop firmware or the speedstep support logic. There isnt anything
we can do until Intel give us docs on speedstep

Alan

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