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Date: Thu, 20 Sep 2012 16:18:58 -0400
From: Iordan Iordanov <iordan@cdf.toronto.edu>
Organization: University Of Toronto
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Cc: CDF Admin <admin@cdf.toronto.edu>
Subject: kernel panic on boot with FreeBSD 8.1 and 9.0
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Hello!

We have a server with a Supermicro H8DGi-F motherboard. This motherboard 
has two 4x PCIe slots. Next to the ports on the motherboard is written 
"(PCIe 4x in 8x)". We have Intel and Supermicro 4-port PCIe 8x ethernet 
adapters. Whenever an adapter of either manufacturer is inserted into 
one of the (PCIe 4x in 8x) ports, the FreeBSD 8.1 and 9.0 kernel panics 
on boot with:

panic: Couldn't find an APIC vector for IRQ 14

Putting the adapters into any of the other ports (8x and 16x) has no 
issues. Just to make sure it's not a hardware issue, we booted into 
Linux, and the adapters work fine in the 4x (in 8x) PCIe ports, with 
large transfers performed through them.

FreeBSD has been upgraded to the latest binaries.

Do you have any suggestions to us, and/or do you require any more 
information? Please reply-all so I can see your reply as I am not 
currently on the mailing list.

Thanks!
Iordan Iordanov