Questions tagged [grub-efi]

Questions about using grub on EFI/UEFI systems relating to configuring, installing or removing grub from EFI/UEFI partitions.

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Windows 10 grub entry broken after installing Ubuntu 22.04

I installed Windows 10. It worked. After that I installed Ubuntu 22.04. Now Ubuntu 22.04 works but when I select the Windows 10 grub entry and enter I get the error Setting partition type to 0x7 error:...
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2 votes
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Ubuntu 20.04 Can't get passed login after update

4 days ago, I decided to install the update that "Software and Updates" has been suggesting for a while. After the progress dialog was gone, I closed the laptop lid, expecting it to sleep(...
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GNU GRUB is not showing

I have windows 10 in one hdd(MBR) and on another hdd I fresh installed Ubuntu 20.04 But I'm not getting the option to select which os to boot like earlier. I tried updating grub and also manually ...
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155 views

After upgrading to 22.04, laptop directly boots Windows 11 with and error message on Lenovo Logo screen

Issue: During boot I get some error messages and then the laptop boots to Windows 11. I am using a system which has UEFI with secure boot on. Error Message: Failed to open \EFI\ubuntu\grubx64.efi - ...
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Ubuntu Server 20.04 multi-boot install?

I attempted to install Ubuntu Server 20.04 on a specified partition (/dev/sda5), with GRUB already having been installed on the EFI system partition at /dev/sda1 (i.e., installed to /dev/sda, which is ...
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Win11/Ubuntu 20.04 Dual Boot: Cannot start Windows anymore from Grub Menu

So, a couple of months ago I installed Ubuntu as my second OS alongside Windows 10 (recently updated to Windows 11), and it worked without any major issues. Finally, I had a great work station for ...
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After changing grub timeout , to boot the PC doesnt reflects the changes done in the grub

I have installed Ubuntu 20.04 I am not using windows anymore. I have been trying to change the grub timeout with success and update the grub afterwards. But when restarting the OS again , the time out ...
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unable to boot windows or ubuntu and Maind Partition became unallocated after changing boot partition's file system

boot-repair-4ppa200 [20220324_2347] ============================== Boot Info Summary =============================== => Grub2 (v2.00) is installed in ...
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grub2: chainloader: case insensitive

In the chainloader command, directories are case-sensitive. Is there a switch in the chainloader command that allows me to insert a directory in a case-insensitive way? If not, what is an alternative ...
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1 vote
1 answer
109 views

GRUB is showing at boot even though it's supposed to be hidden

Here's my GRUB config: GRUB_DEFAULT=0 GRUB_TIMEOUT_STYLE=hidden GRUB_TIMEOUT=0 GRUB_DISTRIBUTOR=`lsb_release -i -s 2> /dev/null || echo Debian` GRUB_CMDLINE_LINUX_DEFAULT="quiet splash" ...
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43 votes
3 answers
4k views

accidentally deleted EFI partition, system is still running!

I am running Ubuntu 20.04, I accidentally deleted the EFI partition (Damn GParted!) The system is still running. Can I create a new partition in the now UNUSED area, set the EFI flag and boot flag, ...
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Grub, get default target of the platform in use on my PC through bash shell

Eg: "x86_64-efi" How do I know the default target of the platform in use on my PC? Does it reside in some file or can I get it via a command? I have not found relevant search results on the ...
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grub/install fatal error when installing Ubuntu 20.04 in Macbook Pro 15

I'm trying to install Ubuntu 20.04 on a Macbook Pro 15 as my host OS (no dual-boot). I have been following the tutorial from this website: https://www.macworld.co.uk/how-to/how-install-linux-on-mac-...
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Ubuntu boots too slow after deleting Redhat EFI

I had three OSs, windows, Redhat and Ubuntu I wanted to delete Redhat so I deleted its EFI from windows then when I log to ubuntu it takes like 5 mins to boot before deleting Redhat EFI it was taking ...
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A GRUB EFI boot-option has been enabled automatically

I was using Ubuntu in a flash drive in my Dell Inspiron 14 5415 laptop (Windows 11) and everything was going really well until today when I had to restore the Ubuntu from the Timeshift image. When I ...
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Grub not showing after windows first boot

I have made a dual boot installation of ubuntu 20.04.1 server after resizing the windows partitions on the only available disk. I followed the installation procedure and after a successful ...
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1 answer
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"boot device not found" after manually changing grub.cfg for dual boot

I tried to dualboot window with Ubuntu for that i edited the Grub.cfg file just i added This the code I wrote there in Grub cfg file After that, i restarted my laptop and getting this kind of error as:...
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1 answer
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Unable to see Dual-boot option at startup with Windows 10 and Ubuntu 20.04

Friends, this is a popular question without a fixed solution. Kindly assist, as work is at halt. I dont see dual boot option and enter windows directly unless I press F12 and choose Ubuntu. I have ...
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1 answer
172 views

Can't boot with secure boot and with the kernel signed

I want to use Secure Boot with my own keys and with the kernels that I sign. I have gotten Grub to boot, but not with the signed kernel. I get this: "Error: /vmlinuz-5.4.0.91-generic has invalid ...
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2 votes
1 answer
436 views

Errors while installing Ubuntu 20.04 on a Mac Mini A1993

Idecided to install Ubuntu on my Mac Mini, and delete the macOS partition. While installing Ubuntu 20.04 on my Mac Mini 2018 model A1993 I came across some errors and the installer wasn't able to ...
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1 answer
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Landing in systemd emergency prompt after lengthy boot repair process. Problem: Missing FS in fstab flile

I realize there's been several questions by people who've had issues booting already, but I think mine is a rather particular case, so I'm posting yet another question in hopes of addressing some new ...
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Problem with Grub configuration (Windows 10)

I have Windows 10 and Ubuntu installed on one physical SSD disk. Linux pc 5.11.0-41-generic #45~20.04.1-Ubuntu SMP Wed Nov 10 10:20:10 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux Using a grub-customizer, ...
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1 answer
24 views

Resolve two EFI issue installation [duplicate]

I installed my entire Ubuntu OS on HDD along with it EFI. I already has a EFI in Local Disk C but there was not enough space available to install Ubuntu in there. I wanted to know that will it cause ...
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How can I access grub and boot from USB on an iMac?

I can't boot from USB and I can't access grub! Here's what I tried so far: Holding shift, ESC and Alt on boot. Changing the timeout in grub from 0 to 5 Changing grub=hidden to grub=menu But I just ...
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7 votes
3 answers
2k views

Put old SSD with Win10 Installed into laptop with Linux and boot Windows?

I have an old laptop with Win10 installed in it from factory. I have a new laptop with Ubuntu 21.04 installed from factory (with systemd-boot bootloader installed in UEFI mode). Can I put the SSD from ...
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1 vote
0 answers
45 views

How do I make second disk in zpool bootable?

I have two M2 drives. The old one appears to be in pre-fail mode, so I am trying to migrate my system over to the new M2 drive. I have successfully created four partitions (boot, swap, bpool, rpool) ...
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0 answers
148 views

Grub Bootloader installation error on NVMe SSD or SATA HD (HP Pavilion Desktop PC)

After managing to boot into an Ubuntu Studio Live system on USB by using acpi=off ... Booting Ubuntu Studio sticks at different points (HP Pavilion Desktop PC) ... I can't install the bootloader grub ...
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1 answer
411 views

Trying to reinstall Ubuntu on an external NVME drive but getting error when booting - Alert! uuid does not exist. Dropping to a shell!

Hello everyone. (Editing this question to include more details) I'll try to describe my issue without making this a super ultra-long thread. Long story short: I've always wanted to have the freedom of ...
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Is there any way to make ubuntu really portable? (installing without dualboot) [duplicate]

I have a superfast 500gb external SSD so I want to install ubuntu on that. First I downloaded Ubuntu 20.04.3 LTS ISO and created a bootable pendrive using rufus on a 8gb thumb drive. Then booted from ...
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1 answer
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SOLVED: In rEFInd, need 2 different OS icons for 2 instances of same OS (Ubuntu-MATE)

SOLVED: See bottom of this post. I have an Ubuntu-MATE 20.04 LTS install (kernel 5.11.0) on an internal nvme0 drive. SOLVED: See bottom of this post. I have another MATE 20.04 install (kernel 5.4.0) ...
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0 answers
60 views

Ubuntu doesn't appear in the boot order list

Last time I had an error installing Ubuntu because when I selected Windows 10 on the grub list, Windows 10 always showed a message saying "Windows 10 needs repair". But that error happen ...
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1 vote
0 answers
110 views

How about only one zpool in Ubuntu instead of bpool + rpool? Will zsys or anything like systemd mount generators be broken? Other concerns?

I am aware that grub does support only some of zpool features and usually this is the reason of having 2 pools. Also 2 pools are used to encrypt only one (rpool) of them. But that’s not a problem if I ...
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1 answer
1k views

Windows replaced Ubuntu's GRUB

I am using Ubuntu with windows 11 as dual boot but due to faulty update from Microsoft, I have to reinstall windows 11. Now, windows 11 replaced Ubuntu's GRUB. How to recover grub? I have an SSD with ...
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0 votes
0 answers
129 views

How to customize Ubuntu ISO grub install params

I want to customize the installer in default ubuntu 20.04 iso image. More specifically I want to either Completely skip grub install ( I want to do it manually ) Add additional params to grub install ...
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0 votes
1 answer
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Corrupted Windows boot and BIOS while dual booting?

So I was/am trying to install Ubuntu to dual boot Windows and Ubuntu together, but while trying to do so, I went into the BIOS and I believe I changed the boot menu to Legacy - I think it was a drop ...
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0 votes
2 answers
138 views

How do I remove Linux and GRUB from my computer when I installed it on a seperate drive [closed]

I am trying to remove Linux from my second drive to prepare my laptop for craigslist. Specifically, I have Windows 10 on one SSD and Linux Mint on a different SSD, and I would like to reset my Windows ...
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0 votes
1 answer
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Boots to grub command line or shows you need to load kernel first message for 4-5 reboots before booting normally

I know this has been asked a lot of times before and I have tried almost all those fixes the commands like set root=/dev/nvme0n1p1 always fail tried both boot-repair disk's recommended repair and ...
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1 vote
0 answers
47 views

Alarming grub message that has no significant effect - how to get rid of it? [duplicate]

On a test system today I installed an SSD - this is the first time I've messed about with a PCIe mounted SSD instead of a SATA one. The test system is a 64 bit UEFI computer, currently it's triple ...
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0 answers
62 views

Boot to hidden windows partition using grub

im trying to fix my dual-boot with another installation of windows on an SD card but my laptop doesnt seem to load SD cards during boot time and i couldnt find anything in the boot order I was ...
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0 answers
53 views

Can I use an existing EFI partition as /boot?

So I'm planning to switch full-time to Pop_OS! and while backing up (which is another can of worms I'll be explaining later), I realized "Wait, do I have to create a new partition for boot? Or ...
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1 vote
0 answers
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Boot stuck on HP logo after initramfs fsck

Update: I bit the bullet and did a fresh install, so this is no longer an issue. I don't think I'd consider it "solved" though. Went to fire up my computer this morning and was met with the ...
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-4 votes
1 answer
95 views

Windows 10 boot option in Grub Menu failed to boot windows 10 (21H1)

Windows 10 version 21H1 upgrade destroyed my grub menu on both of my Desktop and Notebook. I fixed the grub menu and face new issue. Windows 10 boot option in Grub Menu failed to boot windows 10 (21H1)...
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2 votes
2 answers
6k views

Installing Ubuntu on MacBook Pro 2019 with macOS Big Sur

I am trying to install Ubuntu on MacBook Pro: MacBook Pro (15-inch, 2019) macOS Big Sur 11.5.1 2,6 GHz 6x Intel Core i7 I created new partition on Mac SSD for second OS and bootable USB with Ubuntu ...
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1 vote
1 answer
36 views

is it possible to make a ubuntu hard drive portable with ubuntu already installed?

I installed ubuntu 20.04 on an external hard disk using gparted to make partitions and i did everything this said but i gave up on the E step (Install Grub onto the ESP partition) because i couldn't ...
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0 votes
0 answers
156 views

Lubuntu 20.04 - Error configuring shim-signed - GRUB install devices on update

I used to have both a Windows 10 disk and another with Lubuntu, but now I left the Lubuntu as the main disk, and removed the other one. I was updating and the following message appears: I selected ...
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1 vote
1 answer
382 views

Corresponding Edit In grub.cfg

How would you translate this single edited line GRUB_CMDLINE_LINUX_DEFAULT="amdgpu.ppfeaturemask=0xffffffff" from /etc/default/grub to /mnt/boot/grub/grub.cfg on mkusb 18.04.5 LTS ...
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0 votes
0 answers
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Boot error after accidental reboot: "/dev/sda2: recovering journal"

I’ve been stuck on the boot screen for very long time. I’ve just installed Ubuntu on my old PC today and I just pressed a random key and I think I accidentally booted. This is what I see when I now ...
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Unable to boot installed Ubuntu on 2006 Mac Pro (1,1)

Added bootia32.efi to install USB Stick and can boot to try/install. Install goes smoothly but am unable to boot the installed version (20.04). I've tried the usual suspects (reinstall grub, boot-...
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0 answers
61 views

MokManager hangs when no display is present

We are using NUC10i3FNB devices headless in an IoT application. When upgrading kernel to 5.11.0-22 on Ubuntu 20.04 it requested MOK manager to run to install additional keys. With no display, these ...
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0 votes
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How do I fix "GRUB_" boot linux?

When I try to dual boot, It seems some error occurs and this GRUB_ command line appears, but I cant interact with it, it's fixed. Before the grub command line appears, this error is shown: Invalid ...
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