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From: John Baldwin <jhb@freebsd.org>
To: freebsd-current@freebsd.org
Cc: Piotr Kubaj <pkubaj@anongoth.pl>, freebsd-hackers@freebsd.org
Subject: Re: Freeze during booting of ASUS F2A85-M motherboard with Coreboot
Date: Mon, 26 Sep 2016 13:48:46 -0700
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On Wednesday, September 21, 2016 11:19:05 AM Piotr Kubaj wrote:
> I'm trying to boot the ASUS F2A85-M board with flashed Coreboot 4.4 and
> SeaBIOS 1.9.1 as a payload.
> 
> This board works nicely with stock UEFI, it can also boot Slackware 14.2
> from Coreboot with SeaBIOS without any issues.
> 
> But it seems to have problems with FreeBSD (I've tried 11.0-RC3 and
> later 12.0-CURRENT). That's why I'm posting it here, instead of Coreboot
> mailing lists.
> 
> Booting freezes after printing:
> pcib1: failed to allocate initial I/O port window: 0x1000-0x1fff

Do you get this message in a verbose dmesg with the stock UEFI?

-- 
John Baldwin