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Questions tagged [grub2]

GRUB2 is the second revision of the GRand Unified Bootloader, with versions numbered 1.9x and 2.yz.

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NixOS fails to boot after install in dual boot

After installing NixOS via usb, in a separate partition of 80 GB, I boot through GRUB and get the following log: :: running early hook [udev] Starting systemd-udevd version 255.3-1-arch :: running ...
NeekoKun02's user avatar
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How to update GRUB after updating system, on Fedora, with NVMe SSD

The Fedora documentation on updating to a new Fedora release recommends that, after we update, we should update the GRUB bootloader. They provide the following suggested advice on how to update: $ ...
D.W.'s user avatar
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Can't load Debian/GRUB after fresh installation - unsupported OS

I'm trying to install Debian 12 on my HP Proliant ML20 Gen 9. First of all, I need to state that it's not a supported OS (quite unsure, given the documentation is ofr DL20). I had already installed ...
Akari Oozora's user avatar
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Problems updating GRUB from 2.06 to 2.12rc

I am trying to update GRUB from 2.06 to 2.12rc on my CLI-only Ubuntu VM. However, nothing I do seems to work! I can connect to the Internet, which I know because ping 8.8.8.8 gets a successful ...
SuperDialga's user avatar
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"Insmod cryptodisk" is missing from grub.cfg?

I am following this guide this guide on /boot encryption for my Ubuntu system. I am currently on section 3, after deciding to not complete section 4. (i.e, I don't wish to avoid multiple password ...
SuperDialga's user avatar
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Security implications of avoiding extra password prompt in /boot encryption? Do GRUB and Linux compare against the same hash?

I am following this guide on full disk encryption, including /boot. Section 4 involves placing a key that can decrypt /boot and / into the initramfs image contained in /boot, so that once you unlock /...
SuperDialga's user avatar
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Custom EDID for specfic physical monitor, not output [amd]

I have a setup where I connect to two different displays depending on where I am. I would like to use a mode which one of the monitors doesn't allow, but that won't be loaded when any other display is ...
Aditya's user avatar
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What stage of boot is asking for my password?

I just finished this guide on (almost) full disk encryption. So now my root directory and /boot directory are both encrypted, and GRUB is password-protected. /boot/efi is still unencrypted. I haven't ...
SuperDialga's user avatar
1 vote
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Encrypted /boot: why don't I have to enter my password (at least) twice? (Manjaro/Arch) [duplicate]

I recently set up Manjaro and noticed that my boot partition seems to be encrypted, neat! I got curious and read a lot about the details of the Linux boot process, however I can't make sense of one ...
Syndace's user avatar
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-1 votes
1 answer
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Grub2 not booting initrd

I have a laptop (with UEFI) that used to be able to boot from a usb stick, but can't any more. The problem started when I interrupted a fresh install of Devuan Live. The laptop has a non-removable ...
Bruzzel's user avatar
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Grub won't dual boot Windows 10

Edit: Pretty sure the problem was I destroyed the original EFI partition with my sequence of OS installs. Fixed the problem by reinstalling Windows then Linux. New to linux, tried to dual boot, and ...
Hedgehog Elite's user avatar
2 votes
1 answer
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boot usb iso-image from grub2

My laptop refuses to boot from a "live" usb stick, but I have grub2 on my HD, so I thought I'd boot the stick from there. In the grub2 console I tried: set root=(hd0,msdos2) chainloader /efi/...
Bruzzel's user avatar
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1 answer
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Configure Grub2 to boot multiple Linux installations on multiple drives

I have three OSes installed on my PC currently: Windows 11 (nvme), Fedora 40 (sda), and Fedora 39 (sdb). I would like to configure Grub (installed on sda) to be able to boot all three OSes. It auto-...
Noah R.'s user avatar
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Boot failing: Dracut-initqueue rm: cannot remove /lib/dracut/hooks/initqueue/finished/devexists-.....sh: Read-only file system

I started using Dracut around a year ago to use Yubikey Pin unlock and everything was fine a few days ago. After a routine apt update on my LUKS encrypted Debian Trixie machine the linux kernel was ...
bluewolf's user avatar
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stuck on "still waiting for dracut initqueue hook" timeout

In an attempt to use my TPM module to automatically unlock the LUKS-encrypted LVM volume, I followed a guide and set up /etc/crypttab and installed dracut which then proceeded to create what I think ...
bluppfisk's user avatar
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How to make UEFI shell reading contents of the ISO or DVD?

I have been looking for way to create an ISO file that contains tools that I use often. The ISO file can be mounted remotely through BMC, and lauch the tool through UEFI shell. So far, the UEFI shell ...
cchong's user avatar
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GRUB password seems useless, so why even bother?

My system has full disk encryption except for /boot. I've set a GRUB password by following this post, but then was able to disable it by booting into Kali Live and running: mkdir /mnt/dev/sda2 sudo ...
SuperDialga's user avatar
-1 votes
1 answer
51 views

Better way to avoid Grub2 password protect on every boot? --unrestricted gets overwritten

I've read this post about only requiring the GRUB password when you're trying to edit GRUB settings, still allowing to boot into the OS without a password. The only solution I've found is to edit /etc/...
SuperDialga's user avatar
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Grub still can't detect CentOS install after update-grub in Ubuntu

I have an old PC (Dell Optiplex 990) that I'm trying to repurpose into a Linux machine to get more familiar with Linux. I'm setting it up as a dual boot machine (Ubuntu 22.04, CentOS 7). The system is ...
Angelo Tabada's user avatar
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Unexpected return from initial read: Device error, buffersize 0

After updating GRUB I get: Unexpected return from initial read: Device error, buffersize 0 Failed to load image: Device error start_image() returned Device error My first guess is that the disk is ...
Ole Tange's user avatar
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1 vote
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Why are new kernel versions not appearing in Fedora 40 Grub?

I upgraded from Fedora 38 to Fedora 40 more or less smoothly. Yet, when new kernels are installed, the grub configuration is not updated. The command grep vmlinuz /boot/grub2/grub.cfg shows linux /...
Luis A. Florit's user avatar
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Grub does not see LinuxMint when dual boot Fedora 40 and LinuxMint 24 on external SSD

So I installed on my external SSD both LinuxMint 24 and Fedora 40. Here is how: Partition table of SSD: GPT and split my SSD in 500GB Ext4 and 500GB empty First installed LinuxMint on empty with ...
Boq7's user avatar
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1 vote
1 answer
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Where does cryptomount in Grub create decrypted disks

The documentation contains: Successfully decrypted disks are named as (cryptoX) and have increasing numeration suffix for each new decrypted disk. If the encrypted disk hosts some higher level of ...
jabaa's user avatar
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Grub "failure reading sector" from Live USB

I'm having an issue booting a live USB for Ubuntu 22.04. When selected by my boot manager, I get an error error: failure reading sector 0x5b88c0 from 'hd0' This is a 16 GB USB 3.0 drive (type A) and ...
Hari's user avatar
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Grub cryptomount with BtrFS RAID: how?

I'm on Ubuntu 23.10, with three LUKS disks (whole disk, no partitions). Inside of them is a btrfs RAID1. /boot is combined with /root, inside of LUKS. Having done grub-update and then grub-install ...
Diagon's user avatar
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Centos 7 Increase CMA Size

I have a SBC module and it has Centos 7 with 3.10.0-1160.114.2.el7.x86_64 kernel version. I have to increase CMA size to 128MB which is default 4MB. I check my kernel menuconfig and DMA Contiguous ...
Alp Er's user avatar
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2 votes
0 answers
34 views

grub does not see the microsd card

I have a laptop with Ubuntu on its main drive (/dev/nvme0). I am trying to get it to dual boot another Linux install, which is physically located on a microsd card. When booted into Ubuntu, I see the ...
Eugene Smith's user avatar
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Grub Cryptomount & Multiple Partitions in a LUKS container

It's possible to put multiple partitions in a LUKS (and LUKS2) container and, according to this question/answer, we can get it to work. The question I have is whether on bootup there's some way to ...
Diagon's user avatar
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2 answers
1k views

Could not create MokListRT: volume full etc when trying to boot almost any distro/liveUSB

I'm having this issue for a few months now...I was using fedora for a long time but it broke after an update and since then I can't install or run a live environment of almost no distro...so far only ...
strangeattractor's user avatar
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80 views

grub2: which /boot/efi/EFI/*/grub.cfg does it read?

I have a dualboot linux, fedora and almalinux. After installing almalinux, I couldn't see the fedora's kernel versions, just multiple entries of Fedora. Most of the links I found are wrong. https://...
None's user avatar
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0 answers
17 views

System crashes desperately need grub fixes

Basic information about the system on which the problem occurs: the operating system is RHEL9.2, running on VMware17 virtual machine the total size of the hard disk 40g, my hard disk using MBR ...
Darcy Walter's user avatar
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0 answers
58 views

Unable to boot using Grub, instead getting thrown into the grub command shell

I am currently trying to find a fix for the above described problem and while doing so have been unable to find an answer as seemingly none of the solutions work, I have tried every posted answer on ...
koulmoir's user avatar
1 vote
1 answer
67 views

Moving /boot, how to update grub to find new location /boot/grub2/i386-pc/{core,boot}.img

Grub2 systems hard-code the location of stage2 files. This info is stored in the bootloader partition. I understand that grub-install will write this and more. My question is how does grub2-install ...
Steve H's user avatar
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0 answers
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Installing Grub on btrfs /boot when root is on ZFS

I'd like to use Grub for booting my Linux system. The system has its root filesystem on a ZFS dataset, it has the usual EFI boot partition, and a btrfs partition that can be used as /boot. When the ...
Cactus's user avatar
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1 answer
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Change GRUB2 menu entry

I'm attempting to change the name of an existing entry in the GRUB2 menu from "Red Hat Enterprise Linux blah blah blah" to "My Linux Distro" (or anything!) but no matter what I do, ...
lmnopq1234's user avatar
1 vote
1 answer
66 views

BadRAM Range: cannot set up the right range

I think my MacBook with soldered RAM has a RAM issue.  With memtest86+, I figured out which BadRAM pattern I have, but I cannot interpret the result correctly.  How should I read the range to set up ...
devreklim's user avatar
0 votes
2 answers
57 views

/boot/grub/grub.cfg is read protected for regular users. Why?

I was wondering why the file /boot/grub/grub.cfg is read protected. The only thing that comes to my mind is because it can contain a hash of a password if I use grub with a passwd. I am however not ...
Uno Dos's user avatar
0 votes
1 answer
225 views

Error with grub2-install on Amazon Linux 2023 after Migrating to LVM with EFI System

I set up an Amazon Linux 2023 EC2 and migrated the disk over to a new one to use LVM, (I didnt put the BIOS and /boot/efi on LVM.) I believe my system is using EFI, as indicated by the contents in /...
allyman17's user avatar
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0 answers
35 views

How do I get to BIOS from the "Minimal BASH-like line editing is supported." screen?

I know that you are supposed to type exit or something, but my keyboard is not responsive, but does light up. Does anyone know how to deal with this?
Matvej's user avatar
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Grub custom menu entry booting a wrong partition

I have an external SSD drive, with a Linux installation on partition 1, the EFI boot is partition 2. There is also a second Linux installation on partition 3, that I never use. Then there are two ...
Bertrand125's user avatar
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os-prober finds nixos, but it doesn't appear in grub menu

If I run update-grub it sees all the OSes on my machine (Mint, Windows (work), Windows (games) and NixOs): ➜ ~ sudo update-grub Sourcing file `/etc/default/grub' Sourcing file `/etc/default/grub.d/...
stib's user avatar
  • 111
0 votes
1 answer
224 views

blank screen after ipv6.disable=1 removal from grub cmdline

I want to re-enable IPv6 on my system which is currently disabled in GRUB directly. But if I remove ipv6.disable=1, I then get a blank (backlit) screen. It took me tonight to figure out that I have a ...
Vlastimil Burián's user avatar
1 vote
1 answer
311 views

modprobe: FATAL: Module dm_mod not found in directory /lib/modules/6.6.16

I have built a custom kernel and given a CONFIG_LOCALVERSION of -grant-nvme during compilation. However, when I try to boot into it, no matter what I do, grub seems to look for /lib/modules/6.6.16 and ...
Grant Curell's user avatar
0 votes
1 answer
41 views

correct path for arch linux system /boot/ - x64 laptop uefi machine, GPT partion table

after a rebuild from arch live usb iso, my boot directory is: The tree is correct? Or there is a mistake? I know that the system boot up correctly so I should not modify anything, but i need to ...
Alessandro's user avatar
0 votes
1 answer
25 views

grub_rescue after 2nd Linux install

After installing Arch Linux on a second hard drive from an existing install through the Arch wiki, I was at step 2.1 where it told me to follow the regular installation guide. From there, I finished ...
Kevin's user avatar
  • 139
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2 answers
99 views

Grub2 does not show Manjaro entry along with Ubuntu and Windows

I have a PC with a NVMe SSD (/dev/sdb) and a SATA one (/dev/sda). On NVMe SSD there is only Windows 11, on SATA one I had only Ubuntu, until today. This morning I have installed Manjaro Linux with ...
TechRevo's user avatar
3 votes
0 answers
83 views

How to boot Windows UEFI from Debian legacy Grub with two SSD drives?

I am using Debian 12, and I am trying to add a new line in the grub menu. This PC has two SSD drives, the first one has Windows 10 and the second one has Debian 12. How can I boot Windows from the ...
mabvmex's user avatar
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1 vote
0 answers
165 views

GRUB2 and PXE: error: no suitable video mode found

I am building a diskless Debian 11 image that will load over PXE; that part mostly works, but I'm seeing this annoying message during boot: error: no suitable video mode found. Booting in blind mode ...
j4nd3r53n's user avatar
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0 votes
1 answer
203 views

GRUB2 Terminal: Ubuntu 23.10 does not boot, MX Linux 23.2 on Live-USB does not boot, too - commands?

I have some trouble with a "simple" boot or installation procedure. 1. I would like to boot my Ubuntu, but I do not find the right command words doing it (hd0, fat or ext*). 2. As safety ...
TIMBO 2023's user avatar
1 vote
2 answers
109 views

Various Linux booting messages

I just installed Fedora 39. When it boots it shows a huge message "Welcome to Grub!". (It does boot successfully, though.) A few months ago I had Fedora 37 and that message didn't exist. I ...
Adam's user avatar
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