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  1. #1

    /proc/interrupts APIC edge vs. level

    ??What determines the -edge vs. -level choice for the APIC interrupts?? Specifically for a serial port.
    I have a serial port showing IO-APIC-edge in the /proc/interrupts table. I really would like to change that to IO-APIC-level to see if that will solve a missing interrupt problem. There doesn't seem to be any parameter in "setserial" to do this and I haven't yet found anyplace in the kernel components where I can force the "level" mode.

    Thanks for any clues. (I have kernel 2.6.24)

  2. #2
    Linux Guru Rubberman's Avatar
    Join Date
    Apr 2009
    I can be found either 40 miles west of Chicago, in Chicago, or in a galaxy far, far away.
    Whether interrupts are edge vs. level triggered depends entirely on the hardware you are running, AFAIK. Other than that, sorry but I don't know how to detect the behavior of your interrupt controller or change the kernel behavior in this regard. Perhaps some other monitor of this forum knows more than I do.
    Sometimes, real fast is almost as good as real time.
    Just remember, Semper Gumbi - always be flexible!

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