Asus A8V IRQ/serial problems

[Daniel O'Connor]

I have 2 Asus A8V motherboards running FreeBSD 6.0 and 6.1 (amd64) and I see 
the following in dmesg..

sio0: configured irq 3 not in bitmap of probed irqs 0
sio0: port may not be enabled
sio0: <16550A-compatible COM port> port 0x2f8-0x2ff irq 3 flags 0x10 on acpi0
sio0: type 16550A
sio1: configured irq 4 not in bitmap of probed irqs 0
sio1: port may not be enabled
sio1: <16550A-compatible COM port> port 0x3f8-0x3ff irq 4 on acpi0
sio1: type 16550A

The ports are enabled in the BIOS and do seem to work.. mostly. I have had odd 
problems trying to talk to stuff connected to the on occasion though.

I have another [custom] driver that is based on sio.c and it shows the same 
warning (it is a PCI RS485 card).

I have tried playing with various ACPI & ATPIC settings in the BIOS but no 
change. If I disable ACPI in the kernel the IDE driver fails to activate it's 
IRQ and then panics a bit later...

I have updated to the latest BIOS but it had made no change.

Hmm actually I just looked through the code.. It appears that this happens 
because isa_irq_pending() is a noop unless isa is in the kernel, and it isn't 
in GENERIC. Perhaps those tests in sio.c should be conditionalised on isa 
too?
-- 
Daniel O'Connor software and network engineer
for Genesis Software - http://www.gsoft.com.au
"The nice thing about standards is that there
are so many of them to choose from."
  -- Andrew Tanenbaum
GPG Fingerprint - 5596 B766 97C0 0E94 4347 295E E593 DC20 7B3F CE8C
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