DragonFly bugs List (threaded) for 2007-06
[issue676] SB600 HDA audio (Realtek ALC883) glitch - IRQ sharing?
Joe "Floid" Kanowitz <email@example.com> added the comment:
Tried the suggested:
> sysctl kern.emergency_intr_enable=1
> sysctl kern.emergency_intr_freq=20
. ..both at runtime and as loader.conf variables (quoted appropriately, confirmed
set), didn't notice any impact. While live, I tried 'freq's from 1 to 500. But
> The real issue here is that our interrupt routing is horribly out of
> date, and it isn't an easy thing to port from the current best
> implementation available, which is in FreeBSD.
This got me to open my eyes and notice that the BIOS configuration (as flashes
on the screen during the boot process) says there's a 'Multimedia Device' on IRQ
15. I should probably take a snapshot or something, as I can't remember if it
was assigning *anything* to 3.
The only thing dmesg has to say about IRQ 15 is:
APIC_IO: MP table broken: IRQ 15 not ISA when IRQ 14 is!
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