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From: Leon Kos <leon.kos@lecad.uni-lj.si>
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Cc: Volker <volker@vwsoft.com>, freebsd-acpi@freebsd.org,
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Subject: Re: kern/121558: Supermicro X7SB4 Fatal trap 12 when ACPI disabled
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Previously I've added hints to /boot/loader.conf and booted GENERIC with 
ACPI disabled. Moving hints to /boot/device.hints does not help!
That's why I've asked if the syntax:
hw.pci13.0.INTA.irq="16"
hw.pci15.0.INTA.irq="17"
hw.pci5.0.INTA.irq="19"
is correct?

I am still getting "No I/O APIC 0 to route interrupt to" as shown in
http://www.lecad.uni-lj.si/~leon/other/x7sb4/img_1650.jpg

I've also tried to boot OpenSUSE 10.3 that has kernel 2.6.21.5-31 and it 
boots with or without ACPI.
http://www.lecad.uni-lj.si/~leon/other/x7sb4/img_1651.jpg shows dmesg and 
/proc/interrupts with acpi=off
http://www.lecad.uni-lj.si/~leon/other/x7sb4/img_1652.jpg is the same with 
enabled ACPI (default)

Linux appears to work well with this board. Even handles reboot well while 
FreeBSD 7.0 after upgrade does not as I staded before and shown in photo
http://www.lecad.uni-lj.si/~leon/other/x7sb4/img_1637.jpg

Kind regards!

Leon Kos, CAD lab, Mech.Eng., University of Ljubljana, Slovenia
(http://www.lecad.uni-lj.si/~leon)