"AP #1 failed" installing 8.0-RC3 amd64 on a DK 790FX-M2RS motherboard

[Rodolfo Manin]

Hi!

I'm tying to install FreeBSD amd64 on a system with the following configuration:

- CPU: AMD Phenon X4 9550
- Motherboard: DFI LanParty DK 790FX-M2RS - AMD 790FX + SB600 (Award
BIOS / "AWRDACPI")
- Memory: 4Gb
- Video board: ATI Radeon 3870

Booting the installation CD-ROM works fine for FreeBSD 6.9, but it
panics with an "AP #1 (PHY# 1) failed!" error for 7.0, 7.1, 7.2 and
8.0-RC3.  If I boot with ACPI disabled, I get a lot of "unable to
allocate IRQ" errors (for almost all of my devices), and it halts on
"start_init: trying /stand/sysinstall".  With SMP disabled
(kern.smp.disabled=1), it boots fine.

Yesterday, I updated my motherboard's BIOS to the latest version
available at DFI's website, and spent the morning playing with the
BIOS setup options, but the result was always the same.

I posted a "complete report" (including the full output of boot
messages - with and without ACPI enabled) at FreeBSD's Hardware Forum
(http://forums.freebsd.org/showthread.php?t=8565).

I think this occurs because FreeBSD could not start the other cores of
my CPU (function "start_ap" at "mp_machdep.c").

Does somebody have any clue about this issue?  Is there something else
I could try?  I like FreeBSD a lot, and I'm really looking forward to
have FreeBSD running on this machine! :)


Thanks a lot!!

cheers,
Rodolfo