Supermicro MBD-A1SAi-2550F

karu.pruun karu.pruun at
Sun Jun 22 01:10:33 PDT 2014

Correct me if Im wrong but I understand you don't even see kernel
booting? If true, then seems not related to the new usb stack since
this kicks in much later in the booting process. The hang is
immediately after the boot prompt; I've seen this since 4 yrs ago on
my laptop (macbookpro) and believe it could be due to (U)EFI that I
see your machine also has. Also, might be more related to boot (ie
boot1 + boot2) rather than boot0 since I have a situation where DFly
and FBSD both live in the MBR partitions and DFly's boot0 is able to
boot FBSD, but not itself! Exactly the same phenomenon: I get the boot
prompt (where actually the partitions are F1 = DFly, F3 = FBSD)


and then hitting F3 boots FBSD, but F1 hangs. I can still boot DFly
with an ISO image (get the prompt, set currdev etc and boot), but it's

I don't know what the fix is; would like to hear if anyone has a solution.

In the future (when I'll have some more time), I'd be interested in
working towards integrating UEFI booting into DFly.

Btw, when you'll get your machine to boot, can you tell if it works
with the new usb?



> On Sat, Jun 21, 2014 at 2:23 PM, Roman Neuhauser <neuhauser at> wrote:
>> having just bought a Supermicro MBD-A1SAi-2550F motherboard[1]
>> i proceeded and failed to boot 3.8.1 and 3.8.0 from several
>> different USB sticks.  FreeBSD-10.0-RELEASE-amd64-memstick.img
>> boots normally.
>> the system hangs on exit from the F1/F5 menu (boot0 i believe?).
>> PXE should work but i still prefer having a means of booting
>> from a USB stick.  what can i do to help fix this?
>> --
>> roman

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