Gentoo Archives: gentoo-user

From: Tom H <tomh0665@×××××.com>
To: gentoo-user@l.g.o
Subject: Re: [gentoo-user] Change EFI to BIOS Boot
Date: Sat, 12 Apr 2014 12:16:55
Message-Id: CAOdo=Sx40xV1+=SVKWsoPs369CPiE6TJj4SqWeni5kQVxvkx3g@mail.gmail.com
In Reply to: [gentoo-user] Change EFI to BIOS Boot by Facu Curti
1 On Sat, Apr 12, 2014 at 6:45 AM, Facu Curti <facu.curti@×××××.com> wrote:
2
3
4 > Hi all. First at all i apologize if my english is not enough.
5 > When I installed gentoo, I do that with UEFI, and gpt partitions. But
6 > right now, I tried to install XEN, and this not works with EFI. I cant
7 > wait until somebody fix this problem, So i'm thinking to change "EFI" to
8 > "BIOS" boot.
9 >
10 > So, I deleted the efi (/boot/efi) partition, edited make.conf, and deleted
11 > /etc/default/grub.
12 >
13 > After that, I made a new partition with bios_grub
14 > flag. As explained in [1]. And reinstalled grub2 (with new flags).
15 > But I can't boot. Anyway, I can boot from a live cd without
16 > efi, so the problem is not in bios.
17
18 Did you enable BIOS compatibility mode in the firmware?
19
20 Different firmwares have different names for this but a common one is
21 CSM (compatibility support module).
22
23
24 > I can't find the problem. ¿Some ideas?
25 >
26 > parted -l /dev/sdb:
27 >
28 > Model: ATA KINGSTON SV300S3 (scsi)
29 > Disk /dev/sdb: 120GB
30 > Sector size (logical/physical): 512B/512B
31 > Partition Table: gpt
32 > Disk Flags:
33 >
34 > Numero Inicio Fin Tamaño Sistema de ficheros Nombre Banderas
35 > 1 1049kB 11,5MB 10,5MB bios_grub
36 > 2 58,7MB 24,8GB 24,7GB ext4 rootfs arranque
37 > 3 24,8GB 28,8GB 3999MB linux-swap(v1) swap
38 > 4 28,8GB 120GB 91,2GB ext4 home
39 >
40 > I made install with:
41 > grub2-install --target=i386-pc --recheck --debug /dev/sdb
42 > grub2-mkconfig /boot/grub/grub.cfg
43
44 It's "grub2-mkconfig -o /boot/grub/grub.cfg".

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Subject Author
Re: [gentoo-user] Change EFI to BIOS Boot Facu Curti <facu.curti@×××××.com>