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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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 ...
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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 --...
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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 ...
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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 ...
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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?
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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 ...
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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 ...
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Manjaro Linux randomly fails to mount /boot/efi

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 ...
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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 ...
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Installing windows 10 on multi-boot drive

My SSD has the partitions in the following order Windows EFI C drive Linux systemd EFI (seriously, I boot linux with F12 button everytime) Linux drive Linux swap Windows Recovery drive (yes, it's ...
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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 ...
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How to install grub to the host EFI partition with-in the guest vm?

I want to setup a GNU/Debian along with Windows 11 in my laptop Thinkpad X1 nano. I don't have a Type-C USB hub, so I can't use USB stick or CDROM. So I have to use VirtualBox with write-through ...
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how can I add my second partition with windows installed to the EFI bootloader?

On my system I have two disks with windows and linux installed. The rough layout is this Disk 1: Windows 11 Insider Preview - Windows 11 clean install release version Disk 2: Ubuntu linux The ...
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2 Drives - Removing Dual Boot deleting EFI and Win10 Partitions?

In my laptop I have 2 drives: 1 SSD 128 Gb with Win 10 (EFI) and 1 HDD 1Tb with Debian. I will delete the Win partitions and the EFI for move the Debian system to SSD and all the HDD (1 Tb) will be ...
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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 ...
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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, ...
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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 ...
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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 ...
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Kickstart: Configuring RAID1 with /boot & biosboot

I have an unused laptop that I want to use as storage. It has 2 500GB Drives that I would like to get configured in a full RAID1 configuration. I've seen documentation that it is possible to configure ...
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Install Windows from internal hard drive having linux

I have a old laptop wich has all USB ports burned. The only media accessible is the sd-card wich unfortunately can't be recognized at uefi level. The internal storage of the laptop is not removible ...
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How can I get secure boot working after manually creating EFI partition with diskpart?

motherboard: ASUS ROG STRIX X570-E GAMING Rev X.0x I successfully enabled secure boot and installed Windows 11. Because of issues I decided to go back to Windows 10 and experiment on another machine. ...
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UEFI boot manager in ext4 folder

How can I boot Linux (ext4) with UEFI boot manager in the same partition (without separated UEFI partition)? Example: I have only one partition on my Windows ssd (NTFS) and an EFI folder in the root. ...
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VirtualBox: Can't start Windows with Efi on Windows Host

I want to start Windows Server 2019 in Virtual Box with a Windows 10 Host using Efi. But after checking the Efi Boot in the VirtualBox menu, this is the screen i see: I've already tried: fs0: \EFI\...
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BIOS only shows Manjaro installed usb devices

I have a laptop that came with Windows 10 and I wiped the disk to install Arch. But I screwed up on the bootloader or grub stuff (probably) and It didn't boot. So after that I decided to install ...
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Unused memory address space 32 bit

I'm running linux on my mac mini core 2 duo. The interesting thing is that the EFI for this machine is 32 bit, but the OS is 64 bit. Because of the 32 bit EFI, I only have 4GB worth of address space. ...
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Why does my keyboard not work in QEMU's EFI shell?

I'm trying to install Chromium OS from ArnoldtheBat's builds. However, because of the custom boot process of Chrome OS, I have to modify the EFI manually. So, I get to the EFI shell, but I can not ...
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Install Debian Linux on a Fujitsu Esprimo D7010

After installing Debian Linux on a Fujitsu Esprimo D7010, there is no corresponding boot entry visible. The new Debian installation cannot be booted. It appears the problem is related to secure boot. ...
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Asus to set USB boot style from UEFI/EFI to BIOS

On my Asus laptop, I've disabled the Secure Boot Control, and I've enabled [Launch CSM] (Compatibility Support Module) I partitioned my HD using MBR All my systems on my Asus laptop are boot from ...
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If Ventoy uses GRUB, does it overwrite the EFI partition?

(This may be a stupid question but bear with me, I once managed to overwrite the EFI partition thanks to leftover GRUB from a dual-boot setup, so I wanna be extra careful with GRUB) So, from a video, ...
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Installing Proxmox on separate SSD in system deleted the boot partition on Windows drive?

I don't know why this happened. I installed Proxmox on a separate SSD in the system, but left the Windows drive attached during the process. When I run diskpart and list vol, the EFI partition which ...
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How do you determine which EFI System Partition the system booted from in Linux?

If a system has multiple disks with EFI System Partitions is it possible to determine which EFI System Partition was used to boot the system in Linux once the system is booted if they both boot the ...
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Why am I having two grub menus?

I just installed ubuntu on my external hard drive and then try to turn on my computer I encounter a blank grub 2.40 menu(this blank grub) and after that when I type exit command, it takes me to ...
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Can't boot at all after attempting to install Shim and rEFInd

I'm attempting to set up a refurbished Surface Pro 6 with Arch Linux. The installation itself went swimmingly, but I fell down the rabbit hole of trying to enable secure boot so I could access windows ...
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Can I convert a boot disk from BIOS to EFI (UEFI)?

I have a BIOS MBR (Linux) on my NVME - it works fine. I'm now trying to enable SAM (or Resizable BAR) and in order to do so I have to disable Compatibility Support Module (CSM - i.e. BIOS) from my ...
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Build Grub2 EFI for Ubuntu from nothing

After installing Ubuntu, I deleted the EFI partition. I would like to rebuild that partition, I don't want to perform data recovery. I have recreated a partition of a similar size there at SDA2 FAT32,...
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Some errors while installing Manjaro on a second disk (UEFI+GPT)

I want to install Manjaro on one HDD of my laptop with Windows 10 installed on an SSD. The other days I have installed Manjaro successfully on a removable SSD - when I plug it in my computer, Manjaro ...
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Is it safe to move Windows C:/ partition?

I was trying to install Pop OS 20.04 LTS, alongside my Windows 10 installation, but it says that the EFI partition, which is 260 MB currently, is too small and that Pop requires it to be atleast 500 ...
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Can i delete the drive which contain microsoft and EFI named folder with FAT32 partition type

I have one partition which can be accessed through windows explorer which contains Microsoft and EFI folder I am now confused that can I delete the partition and I can't delete it from the windows ...
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Reset corrupted NVRAM on Samsung NP530U3C

Problem: NVRAM is corrupted and that throws ACPI error which prevents any modern Windows or Windows PE from booting with BSOD. It seems that it is right as described HERE + ACPI BSOD error. What I ...
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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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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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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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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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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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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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