/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)