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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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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1answer
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GRUB cannot mount ext4 logical partition

I am trying out different GNU/Linux distributions and I have several partitions on my disk, namely: /dev/sdc1 - primary, 83, ext4 /dev/sdc2 - primary, 83, ext4 /dev/sdc3 - primary, 82, swap /...
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2answers
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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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1answer
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Custom kickstart install completes but machine won't boot

I have been following the instructions on using kickstart to create a custom install at : http://www.smorgasbork.com/2012/01/04/building-a-custom-centos-7-kickstart-disc-part-3/ I got an unattended ...
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8answers
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not syncing vfs unable to mount root fs on unknown-block(0 0)

I had a windows10 and Manjaro on my laptop and everything was Ok. last day I've installed Kali Linux in another partition. It has installed correctly and it works fine. But the problem is when I want ...
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1answer
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How to build signed grubx64.efi for grub2?

I can build a 64-bit efi grub2 boot file using grub-mkimage under Linux-Mint. But I want to make one that I can use with the signed shim bootx64.efi - signed shim (e.g. from Ubuntu) grubx64.efi - ...
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1answer
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how to resume GRUB2 upgrade apparently blocked by /boot filesystem type=ext2?

details As detailed here, the /boot on this Debian Jessie had filesystem type=ext2 $ mount | grep -e '^/dev/' /dev/sda3 on /boot type ext2 ... ... and was unable to upgrade its GRUB2 $ sudo apt-...
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Grub on Debian not detecting Parrot OS

I tried dual booting Debian and Parrot OS. I started by installing Parrot OS and after, I installed Debian. I also installed grub with Debian. Debian is installed on /dev/sdb1 and Parrot OS is ...
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1answer
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grub2-install Error: modinfo.sh Missing - Common solutions attempted

I know this is a pretty common problem, but I've tried a bunch of common answers (enumerated below) to no avail. Basic setup: I'm setting up a Fedora 31 / Ubuntu 18.04 dual-boot, each with a ...
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6answers
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Add FreeBSD to GRUB2 boot menu

I have Gentoo x64 installed with Grub2 on my MBR drive. Today I installed FreeBSD x64 9.2. Now I'm in Gentoo and trying to add FreeBSD to grub2 menu list. grub2-install /dev/sda os-prober grub2-...
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How to boot linux kernel from network through GRUB2 console?

My test hw, on which I want to boot, is MinnowBoard Max Turbot which is an x86 machine with UEFI and so far, I have successfully built GRUB2 from source and it successfully boots kernel from USB. ...
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Grub won't boot from GPT RAID (gave up waiting for root device)

I'm having problems with booting a Debian 8 system on which I migrated the root partition from a single hard drive to a RAID1 (mdraid). On every boot, I get the following grub error: Gave up waiting ...
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0answers
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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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16answers
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GRUB starts in command line after reboot

I installed Linux Mint on my laptop along with a pre-installed Windows 10. When I turn on the computer, the normal GRUB menu appears most of the time: But after booting either Linux or Windows then ...
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5answers
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Can GRUB font size be customised?

I would like to reduce the size of the font of GRUB boot loader. Is it possible and so how?
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1answer
87 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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1answer
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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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1answer
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GRUB 2 scripting: convert device name in GRUB notation into a Linux device name

I'm trying to use partition labels (or UUIDs, that does not matter) to select root partition without use of an initrd/initramfs. With initramfs, this is fairly easy: root=LABEL=... or root=/dev/disk/...
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1answer
4k views

Add ArchLinux ISO to GRUB menu

I wish to boot into ArchLinux ISO from the GRUB menu. I have learnt that this can be achieved by adding a menuentry to the \etc\grub.d\40_custom And regenerating the grub using sudo update-grub ...
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1answer
80 views

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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1answer
158 views

enabling check_signatures in GRUB

I'm trying to create a new image of GRUB which has an embedded public key file to validate all files loaded by GRUB. So I used the command grub-mkimage to manually create a new GRUB core image. grub-...
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1answer
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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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4answers
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Ubuntu 18.04 server installation gets stuck at 66% while running'update-grub'

I am trying to install Ubuntu server but it always get stuck at the last stage while updating grub.I cancelled the process and rebooted my system, it took me to the grub command prompt grub> . I ...
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1answer
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Debian installed kernel not shown in GRUB

On Debian (Jessie) 8 I added the backports source and installed a newer kernel via: apt-get update apt-get install -t jessie-backports linux-image-amd64 I then ran update-grub However on reboot I ...
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2answers
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How to replace Ubuntu with Arch on a dual boot?

I want to replace Ubuntu Linux on my current set up. Currently I have a dual boot with Ubuntu Mate and Windows 10. I would like replace the Ubuntu installation with Arch. But before I do so I was ...
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1answer
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Debian 9 VmWare Black Screen after reboot

I have installed a debian 9 x86 on a VmWare Workstation, and used it few times, then i have been messing with NetBeans and also gnutls library, i was trying to build static one to use in my program, ...
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0answers
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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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0answers
162 views

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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1answer
94 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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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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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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0answers
32 views

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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1answer
2k views

grub-install on hybrid mbr disk

I followed the very detailed guide for making hybrid MBR record (GPT/MBR) taken from here Now, gdisk says I have hybrid mbr. But I can only boot in UEFI and cannot do that in BIOS (I use external ...
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1answer
1k views

how to repair uefi boot option

I somehow erased all the boot options in my bios (maybe caused by some operation using super-grub disk). I have tried to fix my grub using boot-repair live-usb. After performing recommended repair and ...
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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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0answers
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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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1answer
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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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1answer
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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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1answer
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Booting Fedora27.iso with grub2

I got a problem when I want to install Fedora 27 from iso file with grub2. With several terrible hours searching the answer: Format a USBFLashDrive into fat32. Install grub2 to USBFlashDrive. In ...
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1answer
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grub will not boot new kernel

For some time back I installed Linux mint 17 on my desktop machine, which is a dell studio 540. During the installation process, I did not have any internet connection, because my wireless card needed ...
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1answer
1k views

CentOS 7 stuck at grub prompt after upgrading Kernel

I tried to upgrade the Kernel using YUM and when I ran [root@AFIBAMBOO bin]# grub2-mkconfig -o /boot/grub2/grub.cfg No path or device is specified. Usage: grub2-probe [OPTION...] [OPTION]... [PATH|...
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1answer
2k views

grub2 cannot see filesystem on alternate /boot partition

I have 2 (soon to be more) independent OSes. Right now it is just CentOS 6.6 and 7, but will be adding several more. I can boot CentOS 7 cleanly, but 6.6 will not boot. The error is: error: no such ...
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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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1answer
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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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1answer
359 views

Booting mfsBSD via PXE with UEFI

I'm trying to boot mfsBSD ISO via PXE on a host with UEFI boot enabled. It was a pretty simple task with BIOS boot, the ipxe config for this task looked like this: kernel --name freebsd http://pxe....
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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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2answers
2k views

Working acpi kernel options for Asus FX503VD?

On kernel version 4.15.0-sabayon, the only way to load X is with the kernel options: acpi_osi=! acpi_osi='Windows 2009' (and acpi=off but that's radical and leaves me with no sensors). Otherwise I ...
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1answer
286 views

How do I add “Firmware Setup” option to grub

I'm looking for a way to add a menu option to grub that will result in the same screen as the command systemctl reboot --firmware-setup. I believe that I can use Grub Costumizer in order to add a ...
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1answer
1k views

How to install Grub on SD card?

I want to install grub on SD card because my laptop don't boot from external sata port. I've the SSD connected to the laptop through the external port sata to make it easier for me to boot the ...

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