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Date:      Mon, 31 Aug 2015 09:20:17 -0700
From:      Marcel Moolenaar <marcel@xcllnt.net>
To:        hackers@freebsd.org
Subject:   Re: Puzzle involving serial console and ...??!?
Message-ID:  <9D30425C-CFBF-4502-BA04-6F6B0352610F@xcllnt.net>
In-Reply-To: <20150831030639.GH1153@albert.catwhisker.org>
References:  <20150831030639.GH1153@albert.catwhisker.org>

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> On Aug 30, 2015, at 8:06 PM, David Wolfskill <david@catwhisker.org> =
wrote:
>=20
> By doing so, I have a working serial console (once the FreeBSD
> loader gains control from the BIOS, at least)... half the time.
>=20
> I have determined that whether or not I have a functioning serial
> console for freebeast depends on whether I boot albert from slice
> 1 or slice 2:  if from slice 1, it doesn't work; if from slice 2,
> it does.

Check your boot sectors. boot0 is shared between the slices, so
that=E2=80=99s less of a concern, but boot2 is specific to each slice.
You can force a serial console by writing =E2=80=9C-P=E2=80=9C to =
/boot.config
(if not already done).

It helps if you tell the kernel specifically to use a serial
console (as well):
	boot_serial=3Dyes
	hw.uart.console=3D=E2=80=9Cio:0x3f8=E2=80=9D
	boot_multicons=3Dyes

I have found that with vt(4) it=E2=80=99s pretty much impossible to
not have it claim the console. I haven=E2=80=99t figured out why...

--
Marcel Moolenaar
marcel@xcllnt.net


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