Thank you Crystal for taking the time to offer a recap of the issue.

> > 0x000000003F7BE000 000040 [     1.000004] ACPI: ????
> > 0x00000000FFFD5600 FFFFFFFF (v255 ?????? ???????? FFFFFFFF ????
> > FFFFFFFF)  
>                         
> ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
>                         This looks suspicious.

Is there anything I can do to help explore this?

> However, I'm not 100% sure that the boot with acpi disabled was
> indeed with the modified bios.  The version numbers and strings
> reported by bios0 are the same in both cases, so it would be useful
> if the OP could confirm that the second dmesg is indeed from a boot
> with the modified bios.

Just want to confirm that the OpenBSD boot with acpi disabled was indeed
with the modified BIOS. I could not find installers for the F.13 BIOS
the netbook arrived with, only for the later (and for this model, final)
F.16 update that the patched BIOS is also based on. I specifically
re-flashed the patched BIOS to test disabling acpi on boot.

> > I would recommend you start undoing the changes you made one at a
> > time, and tell us which change breaks things. And if it's the
> > hacked/sketchy bios then you might be SOL. It's too hard to
> > diagnose "I changed a bunch of things and now nothing works, please
> > help".  
I have done this, and all things point to the BIOS - or to OpenBSD's
handling of it / handling of acpi on boot. 

> The changes he mentions are swapping out the SSD, and replacing the
> wifi card.
> The replacement SSD is very unlikely to be causing these kinds of
> issues.

OpenBSD boots fine with the SSD installed (on stock BIOS), the BIOS (all
versions - F.13; F.16 patched and unpatched) detects it correctly, BIOS
HDD self-tests pass.

> The neither OpenBSD dmesg mentions the atheros chipset based wifi
> card, so I'm assuming that it was removed for testing, (especially
> since it doesn't work with the stock bios, and it was listed in the
> NetBSD dmesg).

That is indeed the case. I was undoing and re-doing the BIOS patches
for testing, and to get a booting system on the stock F.16 BIOS I
needed to keep the atheros card removed. I can send you a dmesg.booted
from OpenBSD with acpi disabled under the patched BIOS with the atheros
card installed if needed, if it provides more information.

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