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Date:      Sun, 23 Sep 2018 15:07:18 -0700
From:      "David P. Discher" <dpd@dpdtech.com>
To:        Sean Bruno <sbruno@freebsd.org>
Cc:        freebsd-current <freebsd-current@freebsd.org>
Subject:   Re: UEFI layout includes a freebsd-boot?
Message-ID:  <A0BEDC9F-3D8C-4AB7-BEF8-9557F820ABA2@dpdtech.com>
In-Reply-To: <d3e2e418-8503-b629-8b0d-47bf1508720e@freebsd.org>
References:  <6ebccd3b-5849-4ace-1b20-6afabade91e1@freebsd.org> <966F98F8-B11B-43DF-B283-9EE7FAF4E212@dpdtech.com> <d3e2e418-8503-b629-8b0d-47bf1508720e@freebsd.org>

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I can do some more testing later =E2=80=A6 but my observation is that a =
system booted via EFI, the installer will auto select EFI+BIOS.  If the =
systems boots BIOS, it selects BIOS only.=20

It is possible that the boot sequence to the UEFI USB key, and BIOS Hard =
Disk.  I=E2=80=99m not sure you can say or detect  that a BIOS is EFI =
only.  Where BIOS+EFI support would work on both.=20

This could be a valid setup =E2=80=A6 I=E2=80=99m playing/testing now =
(as I type) with the Radeon and Intel graphics with drm-*-kmod mode =
setting drivers =E2=80=A6 and currently in FreeBSD, thees drivers fail =
when a systems boots via EFI.   So the EFI+BIOS is likely the =E2=80=9Csaf=
e=E2=80=9D option =E2=80=A6 until we can get some more intelligence =
around installations.


This is mostly observed with X7,X8,X9,X10,X11 - series Supermicro boards =
with =E2=80=A6 uh =E2=80=A6 AMI BIOS(?).=20

Not clear if their is a smbios key set to indicate that the BIOS is =
configured to EFI only.

-dpd



> On Sep 23, 2018, at 2:58 PM, Sean Bruno <sbruno@freebsd.org> wrote:
>=20
>=20
>=20
> On 9/23/18 3:57 PM, David P. Discher wrote:
>> This is correct for a EFI+BIOS map. If the installer did this for an =
EFI
>> only map, then that is a bug.
>>=20
>=20
> Is it supposed to "Detect" BIOS vs UEFI booting in the installer?




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