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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Black screen freezing in Macbook EFI Boot

I had Ubuntu on my external hard drive, I had to delete it because i ruined it, after that I reinstalled it and now when I try to boot into my SEAGATE ubuntu hard drive it stuck on a black screen. I ...
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POP OS systemd-boot/kernelstub remember last boot OS (as in GRUB)

Please, how do I set systemd-boot/kernelstub (/boot/efi/loader/loader.conf) to remember last booted OS? In GRUB its easy by GRUB_SAVEDEFAULT=true ... but in POP! OS... How? Thanks!
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I forgot my mac os password on rEFIt

I have MacBook Pro 2013, it has windows and macOS through EFI. I forgot the password of the macOS. I've tried to open the terminal using cmd+s but it opens up a different screen called EFI shell. I ...
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Making rEFInd recognize two Windows 10 and Linux

I've recently installed Windows 10 both on my SSD and HDD. They shared one boot partition on SSD and after startup I could choose either from windows boot manager. Last week I installed Pop os on new ...
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2nd SSD's OS no longer bootable nor visible in bios after sleeping 1st SSD's OS and removing it

So, I keep two SSD's with their own copies of windows plugged into my computer but recently I did something different to boot from one to the other. I put my 1st SSD with windows 10 OS to sleep ...
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Clear EFI Boot menu (Windows 10)

I have some redundant options in Boot - EFI, which I tried to clear out via Visual BCD and Hasleo EasyUEFI, but they keep coming back. I want to keep Windows 10 and remove Linpus lite and ubuntu.
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Understanding UEFI [closed]

When searching the internet for UEFI, I found two types of articles: one type "explains" to me that UEFI is the modern alternative to MBR booting, that it's widely supported by now and that ...
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windows no EFI partition

I installed windows 10 using USB in UEFI mode USB (MBR) installation target (GPT) the USB installation media (created on Ubuntu) dual boots Ubuntu and Windows 10 using grub. menuentry "Windows 10&...
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Windows 10 crash with Nvidia 9400 driver installation iMac late 2009

I know that the problem has already been addressed but in my case by following the various guides on the net I can not solve it.  I successfully installed Windows 10 on a late 2009 iMac and the only ...
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Can’t change boot order on WD Sentinel NAS device

I got my hands on an old WD Sentinel DX4000, put in 4 HDDs and installed Ubuntu server on it I also created a RAID 5 using mdraid All is working really well, however I’m dealing with an annoying issue:...
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MSI Laptop wont recognize any other OS installation

My MSI GF63 thin just wont recognizes any other installation Ubuntu/Solus/Arch as there BOOT path wont be in bios, is there any chance of bios being hardcoded to ignore any other OSs other than ...
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Safe delete second EFI Partition - Windows 10

I removed OpenSuse from my PC (so now I have only Windows), but there are two EFI System partitions. Using Partdisk and bcdedit /enum all, I believe that Windows is using only the first EFI System ...
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Windows 10 Recovery keeps showing on boot after fresh install of Zorin OS Lite

I've recently stumped on a problem after installing Zorin OS Lite 64bit on my old laptop which was running Windows 10 64bit. So basically after installing Zorin OS I was not able to boot into my OS ...
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Windows 10 - disk collision error - I don't know which EFI is being used

The situation: I have an HP Envy 23 all-in-one that originally had windows 8. I updated it to Windows 10. But it has a slow 2TB HDD, so I want to upgrade it to an M.2 drive but keep the original drive ...
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Deleted windows boot EFI partition on accident is there a way I can restore it? (Will provide more info if needed)

I deleted my EFI boot partition on accident and I can't access any data from the windows install on my current SSD. I currently have a windows install on a 300gb backup drive and I can access files ...
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Can you put EFI partition on d: and the BOOT and Data from C: on a new SSD?

Can you put EFI partition on d: and the BOOT and Data from C: on a new SSD?. The system is a Tower running Windows 10 Home. The system came with a 256 SSD which has the EFI partition Disk 0 and the ...
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How to properly add GRUB to load from Windows Boot Loader?

I have a windows installation with BitLocker, it asks me to enter recovery code each time when I load it from grub, but if I press ESC and choose Windows boot loader at UEFI - it works properly. I am ...
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What's the meaning of the bytes between `FilePathListLength` and `Description` in a `Boot####` EFI variable?

I was playing around with the EFI variables in /sys/firmware/efi/efivars and stumbled upon something I don't understand while trying to parse their contents. According to the latest spec of the EFI ...
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106 views

Messed up my grub install. Can I fix it?

I had a dual-boot EFI-based Windows/Linux system, with grub2 pointing to an Ubuntu 18.04 /root partition in /dev/sda6. I tried installing Ubuntu 20.04 in /dev/sda5, which was a spare partition. This ...
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How to bypass EFI Firmware Passcode on MacBook?

I bought a MacBook Air in 2018 (A1932) with an EFI firmware password. The Mac was purchased on ebay, and after the issue. I try to update macOS, but the EFI firmware password was enabled, so I can't ...
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317 views

How to edit files in EFI partition on Windows 10 [duplicate]

I want to edit my Clover boot entries from within Windows 10 to add back my linux mint listing in clover. I could boot my Linux Mint from clover until I was forced to reinstall my Linux mint instance (...
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Windows 10 - Moving Boot Partition to another Drive

Hi I have two NVMe drives. One has the EFI boot and little else (nothing I need) and the other has Windows 10 and all my data. How can I safely move my boot partition to the drive with Windows 10 to ...
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How to fix Windows 10 boot?

I am trying to repair my Windows 10 installation and I can't seem to find a viable solution to it. When I try and select the drive from the BIOS to boot, I get the Error Code: 0x000000e. However, ...
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340 views

How do I make an EFI file boot properly to Arch Linux?

I have installed Arch Linux on a fresh SSD, and I am having trouble booting into it with UEFI. I successfully boot to the ISO on a USB, and I believe that I have successfully installed Arch Linux on ...
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EFI Windows Bootloader Recovery

i deleted windows boot loader in efi instead of ubuntu by mistake. Now i am left with ubuntu without windows. Is there a way to fix the windows boot loader from ubuntu terminal as i couldn't open ...
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How can I boot into a live stick out of a running linux?

I have problem that might be very rare. I want to boot into a live stick out of a running linux (Unbuntu in my case). Doing it the normal way, like rebooting and choosing the stick in the boot options ...
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137 views

Can i do a file based backup of a Windows 10 system partition on a UEFI system?

I'm dualbooting Windows 10 and Linux Mint. Is it possible to do a file based backup of the Windows System Partition using Linux? UEFI is already entirely file based and not bound to the MBR of the ...
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Resizing EFI partition followed by MSR (Microsoft Reserved Partition) - Arch Linux

I have a dual boot setup (Arch/Windows 10) and after installing Windows 10 BIOS update, my ESP partition is now full. I did not follow the Arch recommendations to set the ESP partition to 550MB and I ...
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Enabling dual boot on EFI system

First time I am using EFI/UEFI (what's the right terminology here?) on a system, so far it has always been a BIOS. The new PC came with Windows 10 on it and an EFI system partition. However, I want ...
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384 views

Boot Linux in UEFI from repacked ISO (without writing it correctly)

I tried to unpack an ISO of Ubuntu to USB stick without writing it (i can't use superuser utilities like dd or Rufus). Then i set my USB stick first in UEFI boot priority. I got working GRUB, but when ...
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3k views

Getting out of EFI Shell version 2.70

I bought an Acer Nitro 5, and I'm stuck in the EFI Shell version 2.70 screen. As a not-tech guy, I have no idea what to do from here. I've been Googling to find an answer, but it just doesn't seem to ...
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In EFI/ UEFI shell how to reboot or shutdown the system?

Having consulted resources related to the commands available in a UEFI/EFi Shell I cannot find two commands I would expect to be available reboot poweroff/halt/shutdown What am I missing here? (can ...
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Windows partition refusing to boot after cloning and extending

I recently bought a new, bigger and faster ssd. I needed to clone the disk and extend the windows partition, and did this with Acronis True Image, whose cloning function also happens to extend the ...
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EFI shell no filesystem detected

I'm tinkering with EFI Shell in VirtualBox. I've got a guest OS installed on a raw partition with a bootloader in it. The problem is I can't find a way to mount the desired partition so that I can at ...
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366 views

Why won't the windows installer set up an EFI partition or boot entry?

I've downloaded a win10 ISO from https://www.microsoft.com/en-us/software-download/windows10ISO and I'm trying to install it on a SATA SSD on my desktop. Here's my intended layout: /dev/sda (SSD) /...
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My Macbook Pro is not launching, appears a white screen

I want to use my Macbook Pro but instead appears a white screen, after that appears a black screen with words. I don't know what to do or what I can put to use my Macbook. I was wondering if someone ...
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Is it possible to make a mbr legacy bootcamp win 10 from a gpt partitioned hdd on catalina 10.15.7 with bootcamp 6?

I tried to install win10 to ssd via efi boot on my macbook air 2012, it ran pretty well as far as performance, but because it's pre-uefi it makes it the garbage windows version with no sound, no ...
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Cannot grub-install because efibootmgr fails in chroot

I'm trying to run grub-install on my system which I can access from a LiveUSB and then chroot into my LVM /dev/mapper/VGTout-rootFS LV (mounted in /mnt) : [root@sysresccd ~/myScripts/shl/system]# ./...
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I cloned my Windows on SSD and I can't delete the EFI partition on HDD

I recently bought a M.2 SSD (Seagate BarraCuda) and cloned my Windows 10 (build 2004) on it from my HDD using Macrium Reflect. All good with the process, I changed the boot order from the BIOS to put ...
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32 views

How to defragment multiple EFI partitions?

I tried installing another non-windows (linux) operating system along side Win10 but due to some issues had to delete it later. Now after deleting the partitions that Linux was occupying, I see 2 ...
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322 views

How to update BIOS on Acer SF314-42 without Windows installed?

The official website has a new version of BIOS for my laptop. The download from the website is a zip archive, which contains an executable and a README.txt, which instructs to click the executable ...
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135 views

Repair EFI/GPT Bootloader for virtual Windows 10

An interrupted system update caused the Windows 10 Pro on my virtual machine to get into a Diagnostic and Repair Mode loop and I am trying to fix. I need to access and use a certain program that is ...
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31 views

Install Linux EFI-style but from pxelinux (legacy)

Since it's a complete pain to realize PXE booting via UEFI (I still have not achieved it and time isn't on my side), I tried a workaround by booting from pxelinux while still choosing UEFI-bootloader ...
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360 views

rEFInd not working properly in a new arch Linux installation

I want to install rEFInd instead of GRUB in a new arch linux installation. To do so I have followed the steps in the wiki: First install rEFInd: pacman -S refind Then run refind-install There is ...
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357 views

Return to efi setup from grub commandline

EFI allows you to return to the EFI shell/setup when exiting a bootloader, thus it should be possible with grub(2), but I can't figure it out. What commands do you need to run? Of course you can run ...
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How to install Grub in this situation?

So, I have the following situation: I want to make a dual boot on a laptop and first I have installed Windows and configured and then I installed Pop OS. Pop OS complained that the EFI partition is ...
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190 views

Can I convert my disk from MBR to GPT and BIOS to UEFI(hp laptop 15-ra0xx)

So hello everyone! my laptop has MBR disk and BIOS but on boot menu it also shows boot from EFI file. Does my laptop support UEFI? And if so how do I convert it? hp laptop 15-ra0xx Thank you!
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BIOS Legacy booting machine + GPT 4TB external HDD

I have a very old machine (laptop) which I confirmed it's booting mode is BIOS Legacy. I have built in HDD in my laptop which is MBR partitioned. I have previously installed ubuntu (continuously ...
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163 views

Restore or clone Windows 10 to another partition and dual-boot Windows 10 with Windows 10

I have two Windows 10 partitions on my disk and I could boot into both of them. I could also backup one partition and restore it to the other, which was very convenient for updating and testing my ...
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404 views

Is /boot/efi/EFI/ on Ubuntu the same location as the System Partition/EFI on Windows?

I have a dual boot installation of Windows 10 and Ubuntu, and when I use diskpart to assign a drive letter to the EFI System Partition in Windows and I explore it, it contains the same files and ...

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