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Questions tagged [efi]

EFI stands for Extensible Firmware Interface, and is an updated version of BIOS. It sits between firmware and the operating system in the software stack.

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Why same menu entry does not work when grub is installed with `--uefi-secure-boot` option?

My laptop with Secure boot disabled and enabled CSM support. I installed grub onto my USB stick with --no-uefi-secure-boot options: sudo grub-install --target=x86_64-efi --no-uefi-secure-boot --...
Eugen Konkov's user avatar
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How to enter BIOS menu?

Laptop Fujitsu LH532. After an unsuccessful attempt to install Arch Linux, I cannot enter the BIOS menu of the laptop. It just beeps, power keeps being on, but it doesn't load anything and does not ...
Cat-with-a-pipe's user avatar
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Unable to boot system after removing disk 2 even if windows is installed on disk 1

I have two hard disk, DISK 0 is SSD where windows is installed and DISK 1 is Mechanical HDD. I want to replace DISK 1 with another SSD, but when I remove Disk 1, I'm unable to boot the system (Message ...
Sumit P Makwana's user avatar
1 vote
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45 views

Can't automatically load my efi driver on each system boot

I am trying to make my UEFI driver start on each boot by setting up NVRAM variables via my own program. I've made a program that puts my uefi driver into the EFI partition on the disk and set system ...
NoName's user avatar
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Windows get error UNMOUNTABLE_BOOT_VOLUME after reinstal Fedora Linux

I recently reinstalled Linux (Fedora). I mistakenly formatted the volume with efi. Naturally, I lost access to Windows boot. Firstly, I booted into a flash drive and tried to restore the bootloader ...
Igor Yukhimenko's user avatar
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1 answer
337 views

/sys/firmware/efi/efivars mount point does not exist on artix (QEMU on arch) EFI variables are not supported on this system

I'm trying to install artix on a virtual machine before I install it on actual hardware. I'm using QEMU. When trying to install grub via grub-install --target=x86_64-efi --efi-directory=/boot/efi --...
redpz's user avatar
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1 answer
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Windows 11 not booting after fresh installation

Recently I posted a question when my Windows 11 installation failed to boot. I assumed this was due to me changing a EnableVirtualizationBasedSecurity group policy, but being unable to recover from ...
Johannes H.'s user avatar
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39 views

How to make bootable EFI USB Stick boot from harddisk with existing Windows EFI boot parition (add second boot partition) [duplicate]

I have a bootable USB stick created using PEBakery on a Fat32 partition that resides on a USB flash drive. When I insert this flash drive into a USB port of my computer and boot, it will be recognized ...
Erik's user avatar
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34 views

Cannot delete ubuntu directory from EFI partition

I followed this answer trying to delete Ubuntu from dualboot https://askubuntu.com/questions/1150814/how-to-remove-ubuntu-from-efi-partition Error states that there's no such directory, even though it ...
Kofa's user avatar
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2 votes
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Proxy DHCP via dnsmasq: Grub welcomes me, but then gets stuck

I am attempting to EFI PXE boot GRUB2 using a Proxy DHCP server... It worked just fine with this configuration, which simply replaced the DHCP server: interface=enp3s0 dhcp-range=192.168.1.10,192.168....
Tuxifan WasAuchImmer's user avatar
1 vote
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Understanding why Windows boot fails when EFI partition is moved

Situation I got a new computer with a HDD. I put SSDs in it and made RAID1, then started installing Windows Server 2022. I wanted to use SSDs and a HDD for data. I noticed the HDD already had some ...
Kitet's user avatar
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22 views

Windows 10 Recovery Files not found, problems trying to re-partition disk [duplicate]

I'm Dual Booting Windows 10 and Arch on my computer, and I decided to reinstall the second system. The attempt had failed because I've run out of space on EFI partition. I've started searching ...
Kurogane's user avatar
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43 views

How to capture snapshot of nvram from a T2 mac

Wondering if anyone has any idea how to use MacEFIUtil to capture a snapshot of the nvram to read in a program like WinHex. I have read the article linked above and I presume that I need to run the ...
RMKyle's user avatar
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1 vote
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dd cloned Windows disk to new SSD – boot from clone with error "windows/system32/winload.efi" missing

I cloned my old external SSD /dev/disk2 to my new external SSD /dev/disk5 on macOS with dd. When I now try to boot new SSD /dev/disk5 the error "windows/system32/winload.efi missing" occurs ...
Kevin Lieser's user avatar
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297 views

EFI Partition not taking up full space

I originally installed Windows onto my computer, so it had the default 100MB EFI Partition. Recently, I wanted to dual boot Arch and Windows 11, so I resized the partition from 100MB to 598MB (an ...
eten's user avatar
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Create a backup of the EFI partition on a USB

I have Ubuntu on M.2 disk y Windows 10 on un SSD I had install windows with ubuntu already installed, Windows has put its bootloader in the EFI partition of Ubuntu, since the M.2 disk is the first ...
Mario's user avatar
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My old Samsung laptop stops working on critical system change/boot of newer OS for unknown reason

I have restored a Samsung laptop from 2009 I own to use for some of my workloads recently. It is a Samsung NP-P459-DS01CN with its MB replaced to one found in an NP-R458. Currently its main O/S is ...
nphuracm's user avatar
1 vote
0 answers
37 views

How is display initiated after sleep mode? Does the BIOS/OS uses the EFI partition?

I'm having some weird lines displayed in my screen after my computer goes to sleep mode and when I turn it on. These lines are displayed randomly and I think it has something to do with the EFI ...
Álvaro Rodríguez's user avatar
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Ubuntu server RAID 1 with efi

After installation of Ubuntu server 20.04 with RAID 1, /boot/efi is created only on one disk, if this disk fails system is unbootable. The solution I found is to remove disk from RAID, clone partition ...
Marcin Kamienski's user avatar
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721 views

How do I remove a phantom Windows Boot Manager displayed by grub?

I have a dual-boot dual-drive Dell Optiplex 7060, with a SATA SSD and an NVME stick. Ubuntu Linux 22.04 is installed on /dev/nvme0. Windows 11 is installed on /dev/sda. I first installed Ubuntu on the ...
Dan Halbert's user avatar
-2 votes
1 answer
125 views

Default Windows 10 64 EFI partitions / partitioning scheme

Sometimes you need to partition your disk which already contains a different operating system (OS) or version of Windows thus you use Linux tools such as fdisk or gdisk to create/configure partitions ...
Artem S. Tashkinov's user avatar
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563 views

How remedy situation with two EFI partitions on one drive?

I've got a laptop with two EFI partitions, one for Windows, one for PopOS (I know now this isn't a stable configuration). It was working great for a while - I was able to switch between the two (in ...
UpTheCreek's user avatar
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895 views

Cant get to BIOS menu pages (Insydeh20 setup utility)

I have been trying to boot a USB pen with the gparted live, but it seems it is not detected. Most solutions that I found require me to access the BIOS setup where I should change the boot priorities ...
António Abranches Pinto's user avatar
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0 answers
411 views

Run .efi file on virtual machine

I'm learning baremetal and creating .efi file I can run at boot, like this pong game But rebooting after compilation, then selecting the right drive to boot, just to test the file, is a bit tedious. ...
sayanel's user avatar
  • 115
1 vote
1 answer
24 views

Is it possible to precreate partitions for Windows 10 install on a dual SSD laptop?

I have a laptop with 2 SSD. I want to install on 1 drive, so all of the partitions: EFI, Recovery, System Reserved, main C drive to be all on this drive. For some reasons in my case, the default ...
mle0312's user avatar
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1 vote
0 answers
779 views

New install of Pop!_OS, dual booting on a Dell machine with Pre-installed Windows 10. 522mb EFI boot partition is 97% full. Why?

Every time I boot up I get the warning Low disk space on 'efi' The volume 'efi' has only 12.4 MB disk space remaining. Overview: This is a brand new machine, a Dell XPS 17 that came preinstalled ...
Inigo's user avatar
  • 111
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1 answer
2k views

How to install GRUB EFI to RAID1

While configuring a new server, I try to install the Debian Linux Buster at mirrored disks /dev/sda and /dev/sdb with uEFI. I tried various combination: var1: /dev/sda and /dev/sdb - > /dev/md1 (...
schweik's user avatar
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214 views

LightDM won't start on boot and gets stuck at it in Arch Linux

I installed LightDM display manager on Arch Linux and enabled it with by systemctl command and now everytime I boot my computer, LightDM won't start and gets stuck at it. I sadly can't show a picture ...
PuuRaidur's user avatar
1 vote
1 answer
76 views

Moving a (suspected) grub partition safety when resizing partitions

I am trying to allocate more space to a windows partition by shrinking a linux partition on the same drive, but there is an EFI partition in between the linux and window partitions. This is a picture ...
randomzebra's user avatar
1 vote
1 answer
1k views

GRUB shows menu for Ubuntu 20.04 but not for Pop!_OS 22.04

I decided to switch to Pop!_OS 22.04 from Ubuntu 20.04, while I'm mentally preparing to switch to Devuan in the future. The GRUB is configurable from Ubuntu as expected, but when I do exactly the same ...
Andrew15_5's user avatar
0 votes
0 answers
30 views

Any Windows bootable media won't boot after fixing GRUB2

Recently, I accidentally deleted EFI and Windows partition. Then, I tried fixing the GRUB first on a Ubuntu bootable media (it booted fine). After that, I made Windows bootable using Rufus. But, the ...
Fabieen Rae's user avatar
1 vote
1 answer
338 views

What should be the content of the first sector in a UEFI system with GPT partitions?

As i understand, in UEFI machines there is no MBR/VBR code, and the UEFI firmware directly gives control to the OS boot loader (.efi file). My question is, what should be first sector of such system ...
OneAndOnly's user avatar
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0 answers
44 views

Dual booting linux and windows

I recently installed Linux Mint alongside Windows so I can use both of them. I wanted to get the menu where you choose which OS you want to launch on boot, but I forgot to set the EFI partition's ...
pasator man's user avatar
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0 answers
229 views

How to move EFI folder to C drive

I want to remove an SSD from my main rig to use it in a retro machine. However I've must have placed a EFI folder there by accident when I reinstalled windows 10 on a larger NVME drive. 120GB drive ...
Jonasz Przybycień's user avatar
3 votes
3 answers
1k views

How to normalise Win10 MBR partition to migrate to GPT and standard EFI

My aim is to be able to upgrade to Windows 11. It was originally a Windows XP installation, that went through all the upgrades to WinVista, Win7, Win8, Win8.1 and Win10. With my upgrade path I never ...
rarog4k's user avatar
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0 votes
1 answer
761 views

Moving the Recovery Partition, EFI System Partition, and a 16mb "Reserved Partition" to resize Windows partition

This is my first question, so please let me know if I'm missing something. Long story short, I messed up one of my Windows 10 installation on another SSD and ended up with a Windows system drive too ...
Elizabeth V.'s user avatar
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0 answers
115 views

Ubuntu 18 partition error

I'm new on Linux, just created VROC NVMe RAID1 and installed Ubuntu 18.04.3 on it. Then noticed that lsblk gives an error: "GPT PMBR size mismatch (1781612543 != 1875385007) will be corrected by ...
Perfect Stranger's user avatar
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0 answers
874 views

EFI file structure

I have system partition on my Windows 10 PC. It contains files EFI --Microsoft ----Boot ------bootmgr.efi ------bootmgfw.efi ------bootmgr.efi ------...other files ----Recovery --Boot ----boot64.efi --...
vico's user avatar
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1 vote
0 answers
3k views

How to uninstall grub?

I want to remove grub for another bootloader (i.e. OpenCore). I have some merits in doing so which I won't go into. So my question is how can I completely remove GRUB bootloader. I can just remove the ...
Harsh's user avatar
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1 vote
1 answer
118 views

Repeated Startup Repair on Windows 11

My acer Nitro-5 went into startup repair problem a few days ago. Below is the photo. windows11 startup screenshot Since I have dual boot on my computer, when I start my Ubuntu, the following ...
HoiM's user avatar
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0 answers
175 views

Can somebody help my enlarge the EFI Partition?

These are my current partitions. How do I move 500 MB from C: or F: to the EFI?
Speeter's user avatar
1 vote
1 answer
385 views

Is it possible to install GRUB on a 2006 MacBook with 32bit EFI so I can also boot cleanly from 64bit OS Ubuntu server?

The machine is working, after many tries and big effort, it is up and running. But to boot up the machine, I need to run a Linux Mint 18 boot disc, and tell the machine to boot from internal hard ...
Nik Rubblers's user avatar
0 votes
2 answers
3k views

Windows 11: Cannot delete ubuntu from efi folder "The system cannot find the file specified."

My dual boot installation ubuntu 20.04.4 LTS did not work. So I deleted the partition volume I was going to use for the installation. However, I am stuck with the ubuntu still as an option in my ...
lenny_shhh's user avatar
0 votes
0 answers
199 views

Manjaro Linux randomly fails to mount /boot/efi

A few months ago I started getting errors when trying to boot my Manjaro i3 Linux. It is completely random. Sometimes it boots from first time; sometimes it requires several restarts before it goes ...
Kristijan's user avatar
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1 vote
1 answer
1k views

Format EFI Partition in Windows

I have a laptop with an SSD (Disk 1) with Windows, and a HDD (Disk 2) for Data. A while ago I installed Linux with dual-boot on the HDD but at some point it broke so I just format the Linux partition ...
themaker's user avatar
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1 vote
1 answer
2k views

Add EFI partition to bios menu after NVRAM reset

Everything was fine at the start, my SSD has 2 EFI partitions and I usually switch between OS using the f12 key keeping Linux as default. But, after I cleared NVRAM, the Windows boot manager is there ...
Aditya Sethi's user avatar
0 votes
2 answers
3k views

EFI Network error boot failed

On my Lenovo laptop with Windows 10 I suddenly started to get this error on boot that says: EFI Network 0 for IPv4 boot failed. To solve it, I loaded the Bios and I saw that my hard drive was ...
Keselme's user avatar
  • 101
0 votes
1 answer
31 views

Should I delete excess EFI System Partition?

So I ran into a booting problem today, which i managed to solve by creating EFI System Partition (I somehow must have deleted that by accident). And as you can see, I kind of "overdo" that, ...
GiddyMold's user avatar
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0 answers
1k views

How to choose target disk for boot-loader during Windows 10/11 installation?

I had a Windows 10 and I decided to try Windows 11. My motherboard works in UEFI mode. I had 2 physical disks on my PC: disk 1: here is my current Windows 10 installed disk 2: a disk with an ...
Kirill's user avatar
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-1 votes
1 answer
1k views

GRUB/EFI - Divide & Conquer, smart multiple boot solution

Is there an adequate way to partition a HDD in such a way that every Linux distribution I install has its own GRUB, so that one distro shares anything or interferes with another distro at its absolute ...
Andrew's user avatar
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