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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Updateing an already dual boot pc

I was using a dual boot laptop that used to run windows 10 and ubuntu 14.04 .Ubuntu where quite laggy as I had them for my first years of development (Every programmer owes himself to destroy an os )....
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What goes in grub.cfg to start a Calamares install from a LiveCD?

I'm creating a respin based on Lubuntu 20.04.1 and I'd like the ISO that I create to be either run live or installed. I have the following grub.cfg if loadfont /boot/grub/font.pf2 ; then set ...
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Trying to boot Ubuntu MATE 18.04 OR Ubuntu Mate 20.04

Summary of the problem: I just built a new computer using Western Digital NVMe 500Gb SSD. I installed Ubuntu Mate 18.04.5. I wanted to run Ubuntu Mate 20.04 also so I created a bootable flash-drive ...
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how to list grub2 menuentry in UEFI

I want to get the grub2 menuentry list of linux (centos 8 / fedora 32) with UEFI boot,to use grub2-set-default. I can get menu list with this command in non uefi enviroment awk -F\' '$1=="...
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linuxefi causes “you need to load kernel first”

I am aware of the multiple questions regarding this matter but this one seems to be different. This is the Grub configuration our PXE boot server provides: net_ls_addr sleep -i 5 set retcode=$? clear ...
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kernel boot logging causes delay

I see a very strange behaviour on some (not all) of my Linux machines. I am running Arch Linux with kernel 5.8.8-arch1-1 If I start the machine without grub loglevel parameter (or apply any from ...
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Making a respin with grub-mkrescue to make a live USB

I'm creating a Linux respin based on Ubuntu 20.04.1. To create the final .iso I'm running a script (no longer supported) I found called distroshare. The .iso it creates works, but there are a few ...
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Cannot get Ubuntu Live Boot with Grub2 and secure boot with own key material to work

Okay, whats the story here? I've compiled the open source UEFI implementation for virtualization with KVM, aka. OVMF. To make this project interesting I am compiling it with the secure boot feature ...
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SLES 11 doesn't boot after RAID controller replacement

I need to fix a server (SUSE Linux Enterprise Server) that stopped booting correctly after a piece of hardware, responsible for RAID, got damaged and replaced. The booting process was getting stuck on ...
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How can I encrypt serial console?

I've my headless linux box configured with a serial console. /etc/default/grub: GRUB_CMDLINE_LINUX="console=tty0 console=ttyS0,115200" GRUB_TERMINAL="console serial" ...
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“ERROR: device UUID=”xxx“ not found” on boot after switchg to linux-lts kernel on Arch Linux

ERROR: device UUID="xxx" not found. Skipping fsck. mount: /new_chroot: can't find UUID="xxx". This issue happened after I tried to switch from linux to linux-lts kernel. I did ...
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I have to choose OS two times in GRUB and Windows boot manager

I have windows 10 installed on my laptop. After that, I installed Ubuntu 20.04 in dual boot. I have selected Windows 10 as default OS in GRUB through GRUB Customizer in Ubuntu. But recently I updated ...
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Creating my own Linux that just takes me to a terminal

I am fond of creating my own very Linux Operating System. I see a lot of distributions around and I'm curious if i could create one for my own need. I started surfing to find lot of tutorials ...
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Why can't grub find the disk by UUID?

I'm trying to troubleshoot why I can't boot to Windows. The relevant entry in grub.cfg is: ### BEGIN /etc/grub.d/30_os-prober ### menuentry 'Windows Boot Manager (on /dev/sda3)' --class windows --...
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Ubuntu 18.04 won't boot after booting from 20.04 live USB

This is a bit of a strange problem. I've been running Ubuntu MATE 18.04 on my Acer Aspire desktop for a few years now. I was thinking about wiping it out and installing Xubuntu 20.04, so I booted it ...
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Problems with dual boot in an old pc (pentium 4) without UEFI

I write all of you because I have expended two weks trying to solve this problem, I have seen a lot of youtube videos and read a lot of forums but I cannot fix this. I want to clarify that I'm only a ...
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GRUB cannot find encrypted boot partition

Arch Linux Installation (On encrypted LVM) and attempt to encrypt boot partition. It's something that bothers me having a "Full disk encryption" with a non encrypted boot partition. This ...
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GRUB doesn't show all OS's

I am on Arch currently and have Gentoo in a separate partition. grub-mkconfig -o /boot/grub/grub.cfg (on Arch) returns: Generating grub configuration file ... Found linux image: /boot/vmlinuz-linux-...
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Fedora 30: How to create dual boot with Windows 7?

I have read through all the similar questions here on SE and I am not seeing an answer to my question. My workstation currently has Fedora 30 running and grub2 installed. This is pure BIOS, no EFI in ...
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Dual Boot broken after Pop!_OS Install

I've installed a new Linux Distro (Pop!_OS) and it seems like my Windows install is currently unreachable. I've tried many things stated online and nothing seems to be working. Here's the output I see ...
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Grub randomly stopped working, modinfo.sh doesn't exist, proxy stops yum install from internet

So a couple days ago my Centos 7 installation just... decided to stop working. I had left the computer on over a weekend. There were no issues with it before I left it. When I came back, the monitor ...
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How to disable boot messages on startup?

I am running Gentoo currently. I don't want to see the boot messages it shows me. My /etc/default/grub has these lines: GRUB_CMDLINE_LINUX="quiet splash" and GRUB_CMDLINE_LINUX_DEFAULT="...
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GRUB Bootloader depends on my bootable flash drive to find Windows 10 on the internal eMMc drive

For the rest of this question, you can assume anything with 'internal' refers to the internal eMMc drive of my laptop, anything with 'USB' refers to my bootable USB flash drive, 'Debian' means Debian ...
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how to chainload from image file which contain multiple partitions?

I have a disk images: Sector size (logical/physical): 512B/512B Partition Table: gpt Disk Flags: Number Start End Size File system Name Flags 1 1049kB 262MB 261MB ...
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how to use grub to boot from an iso file with a boot.cat inside?

If I mount the iso file it looks like this: boot.cat some.img The img is a disk image which contains an EFI partition and another partition. How can I boot this kind of iso file from grub2?
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GRUB2: “nativedisk” and “chainloader” commands

From documentation I know that: Chain-loading is only supported on PC BIOS and EFI platforms. Is it possible to use native drivers (provided by nativedisk command) with chainloader command? If not, ...
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How do I remove a kernel from Fedora for good?

I am running Fedora 32 and I want to remove the new 5.7 kernel since it is causing some problems. I have tried: sudo dnf remove kernel-*5.7.10-201.fc32.x86_64 And it did remove something but the ...
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Advice: Set grub-reboot option while the computer is off

I have a dual boot computer I've nicknamed Marcus. I have written an Alexa app that invokes commands on a raspberry pi. The Pi can start, reboot or power off Marcus. I have a command that will issue ...
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390 views

GRUB not showing up in pop os

I recently installed pop os on my laptop and I couldn't get grub to show up in the boot screen. My laptop just keeps showing me a black screen at startup and then boots directly into pop. I've tried ...
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non-grub issue on Windows 10 / Pop!_OS dual boot

I have a Dell XPS 15 7590 laptop running Pop!_OS 20.04. I have previously used Ubuntu, but I recently switched to Pop!_OS 20.04, which I understand is basically a Ubuntu flavor, but I doubt my issue ...
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Grub2 doesn't show Windows 10 and W10 doesn't show an EFI partition

I had setup a working dual boot setup on my laptop of Fedora 30 with Windows 10 and had no major issues so far. However, when I updated to F32 and not too long after (not the best idea I'll grant you ...
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Booting from ISO suddenly stopped working

(Linux Mint 19.3 XFCE w/BTRFS; ISOs are on an EXT4 partition) I'm trying to get my system to boot from ISO images. I added the following entries to /etc/grub.d/40_custom: submenu "System ...
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How to install grub bootloader as second stage bootloader

As you know grub bootloader supports arm architecture on recent versions,but it demands EFI ,thing that is unavaible on most arm base single board computers (SBCs) and they use U-boot instead of EFI ...
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GRUB2 problem with secure boot?

I want to boot the Win10 installer with grub chainloading. So I copied the contents of the Win10 iso to an exfat partition (also tried ntfs) on my USB storage device and typed chainloader (hd0,gpt3)/...
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Dual boot with operating systems which don't support operating system detection?

This question could also be phrased, "How to dual boot with ONIE" but I didn't want to put that because it would scare away all my Linux friends which is really what this question is about. ...
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Move Dual Boot Linux/Windows to seperate drives

Currently, I am dual booting Linux Mint Cinammon 20 and Windows 10 on the same HDD. I have recently acquired a SSD and would like to install Linux on this. Ideally, I would prefer deleting the current ...
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401 views

How to remove grub bootloader from windows 10?

I used to have ubuntu installed in pc hard disk but for other purposes, I can have only windows installed. Now I have uninstalled all partitions having ext4 fs, so only ntfs and bootable fs (vfat32 I ...
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failure reading sector 0x465aa00 from 'hd0'

Currently in grub2 ( trying to solve a boot problem ) , coming from this post grub error: you need to load kernel first However whenever I am tying to set the Linux kernel using this command linux (...
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GRUB multiboot — load my own application and then Linux

I'm trying to figure out if there's a way to load my own application using GRUB and afterwards load the Linux kernel (vmlinux+initrd). Say I have two menu entries: menuentry "my os" { ...
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Kali Linux: MacBook 207 keyboard only available after boot time

I was happy to see that finally my keyboard works on Kali Linux (USB encrypted persistence boot) using my MacBook Pro 2017. However, what is a bit frustrating is that it is only accessible at two ...
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Grub: Difference between (hd0) and (ata0)

Grub used to display (ata0) (ata0,msdos1) ... when I enter ls in the prompt. Now it switched to (hd0) (hd0,msdos1) ... Can someone explain what the difference between the two is and if there is a ...
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Grub error: unknown filesystem (my filesystem is fine I think)

I have somehow broken GRUB. Everytime I boot, I get error: unknown filesystem. Entering rescue mode... grub rescure> ls (hd0) (hd0,msdos4) (hd0,msdos3) (hd0,msdos2) (hd0,msdos1) grub rescure> ls ...
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Unable boot into Linux after BIOS update (dual boot machine)

My notebook has dual boot setup using UEFI mode. Windows 10 (installed by default) and Linux Mint 19.3. It was running ok until a new BIOS update made by Lenovo Vantage. After updating BIOS in Windows ...
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114 views

grub not working after EndeavourOS installation (via live USB)

I installed EndeavourOS (based on arch linux) via live USB following the guide on my /dev/sda partition where I used to have Ubuntu, which worked fine. I also have a separate HDD, my /dev/sdb ...
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Cannot access BIOS after installing Linux

Since I installed Linux on my old laptop, I cannot access the BIOS menu. I have tried fwsetup but I just get a message saying: Could not set EFI variable 'OsIndications'. I have also tried booting ...
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Debian KVM guest unbootable after mkinitramfs - mounting /dev/vda1 on /root failed

07/07/20 Edited: added info regarding problem scope 25/06/20 Edited: added some additional diag information I have an issue where a Debian KVM guest built using virt-resize will work flawlessly up ...
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Installation (UEFI) of Archbang: partitioning and grub2

tl;rd: I have a used Lenovo Ideapad 110S. I want to install archbang on it. Right now, it runs with Ubuntu. I already installed archbang once on this machine. The problem is in the installation ...
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os-prober Doesn't Detect Windows 10 in Archlinux [duplicate]

I installed Arch recently (as in, yesterday). I was able to successfully install Grub in the EFI system Partition with grub-install --target=x86_64-efi --efi-directory=/boot/efi --bootloader-id=grub --...
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Grub2 seems to think I have a BIOS install (i386-pc is what it looks for whereas my install uses x86_64-efi)

As the title says, I am having trouble getting Grub to boot.  Specifically, it cannot find normal.mod at /boot/grub/i386-pc, since that location does not exist. How can I repoint it to the correct ...
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How to add icon to a custom grub boots script?

I downloaded primeos and copied system.sfs, ramdisk.img kernel, install.img, initrd.img from the ISO to ~/primeos and created an empty directory called ~/primeos/data. To boot, I created a custom menu ...

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