Gentoo Archives: gentoo-user

From: Magnus Johansson <gentoo@×××.se>
To: gentoo-user@l.g.o
Subject: Re: [gentoo-user] Grub2 boot problem
Date: Mon, 05 Feb 2018 21:00:51
Message-Id: CAPd5e-KaHHOzsOEpJm=kchxLXQr_YqK_atVsYSHXyF3xV0CMNQ@mail.gmail.com
In Reply to: Re: [gentoo-user] Grub2 boot problem by Tom H
1 > > I've got a fresh Gentoo installation that does not boot. I just end up in
2 > > the Grub2 shell.
3 > >
4 > > However when there if I do 'set root=(md/0)' and 'configfile /grub/grub.cfg'
5 > > I do get to the Grub2 menu where Gentoo boots just fine.
6 > >
7 > > /boot and / are both on mdadm devices.
8 > >
9 > > I've tried re-running grub-mkconfig and grub-install several times without
10 > > luck.
11 > >
12 > > I've added domdadm to GRUB_CMDLINE_LINUX_DEFAULT in /etc/default/grub.
13 > >
14 > > Drives sda/sdb use GPT disklabels and have 20M BIOS boot partitions first.
15 >
16 > To which device are you installing grub?
17 >
18 > Check what "core.img" prefix and modules grub-install is using with
19 >
20 > grub-install --debug $your_device 2>&1 | grep grub-mkimage
21 >
22 > [I hit a similar problem with mdadm 6 or 7 years ago and had to create
23 > a custom "core.img" to boot normally. You might have to do the same
24 > but i would've thought that this problem's been solved. I haven't
25 > encountered it since.]
26
27 I install grub to devices sda and sdb in the hope I can boot from both/either
28
29 m / # grub-install --debug /dev/sda 2>&1 | grep grub-mkimage
30 grub-install: info: grub-mkimage --directory '/usr/lib/grub/i386-pc'
31 --prefix '(mduuid/46488b259685a3b9c52b7449d592dc80)/grub' --output
32 '/boot/grub/i386-pc/core.img' --format 'i386-pc' --compression 'auto'
33 'ext2' 'part_gpt' 'part_gpt' 'diskfilter' 'mdraid1x' 'biosdisk'
34 m / #

Replies

Subject Author
Re: [gentoo-user] Grub2 boot problem Steven Lembark <lembark@×××××××.com>
Re: [gentoo-user] Grub2 boot problem Tom H <tomh0665@×××××.com>