Questions tagged [uefi]

Questions about the Unified Extensible Firmware Interface (UEFI), the software interface aiming to replace typical BIOSes. This tag may also be used for questions related to UEFI partitions and systems.

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Fedora won't boot in UEFI

So I decided to replace the operating system on my laptop. I used to have Manjaro Linux installed with UEFI mode and it worked fine. Now I decided to install Fedora. I first live booted Fedora ...
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2answers
2k views

Removing EFI System Partition from data disk

I have one SSD and one HDD in my computer. I use the SSD as the drive which holds the OSes (Ubuntu and Windows). I installed them on my SSD in BIOS/legacy mode (MBR format) and I still have an ESP on ...
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1answer
709 views

Grub2 uninstalled, now I can't boot my Linux partition.

I'm using Fedora 27 and recently I had a problem with the package manager of this distro, dnf, which removed the grub. Since then I can't boot my Fedora partition, it's explained in detail here : It ...
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41 views

Unable to install grub bootloader of kali linux [duplicate]

I have windows 10 installed on my laptop and need to dual boot it with kali linux. I tried to install Kali Linux using a bootable usb. I installed the system successfully but the got an error while ...
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1answer
524 views

UEFI install ubuntu on usb drive

I have laptop MSI GP70 and I am able to boot installation from first USB stick and install it on second USB stick, then when I want to boot installed system from second USB drive I am unable to do so, ...
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2answers
948 views

How to create arbitrary UEFI boot stubs?

I installed TinyCore as my maintenance OS. I gave that GRUB2. But the TinyCore install instructions tell you to add GRUB2 using the MBR method. (It works but that's just because EFI is backward ...
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1answer
11k views

Can't install grub in Arch Linux

Backstory: I backed up windows 10 and restarted my laptop on a boot drive loaded with the Arch linux iso that was created with Rufus. I entered cfdisk and deleted all partitions except for the "EFI ...
2
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0answers
428 views

How to make separate EFI bootloader entries for Linux Mint and Ubuntu?

When I install a GRUB bootloader entry (with grub-install --target=x86_64-efi --efi-directory=/boot/efi /dev/sda) from Linux Mint to my hard disk, it overrides my Ubuntu bootloader entry in EFI. To be ...
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1answer
3k views

Arch Linux Boot Loader Not Showing As Boot Option

I followed the guide for installing Arch Linux on UEFI system. I created two partitions (/dev/sda1 and /dev/sda2). The first one - EFI type (8200) was formatted as vfat (F32) and the second one (Linux ...
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1answer
224 views

how to use systemd-boot on a KVM vitual server?

I'm installing Arch Linux manually (using an ISO image) on a KVM virtual private server. I'm booted into the ISO image, but it was not booted with EFI. Is it possible to use systemd-boot in this ...
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2answers
2k views

How is the UEFI boot configuration changed during Fedora boot?

Every time I boot a Fedora 27 UEFI installed system it messes with the EFI bootmanager entries. For example: As root, I change the boot-order such that Fedora's entry isn't first. And/or I delete the ...
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2answers
849 views

How to register debian uefi file with my motherboard?

I moved the disk with my debian installation to another computer, and it wouldn't boot. Using systemrescuecd I mounted my uefi partition (512 MB, vfat filesystem, has EFI directory) and did cd /mnt/...
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0answers
1k views

GRUB2 shows “trying to terminate EFI services again”

A few days ago my ubuntu 17.04 software updater on a dual boot system with windows 10 ran some automatic updates and prompted a reboot. Ever since, after I select my boot option in GRUB there's a ...
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1answer
1k views

System skips grub and loads to Windows (UEFI)

It's the first time that I install Linux (Debian testing) on a computer with UEFI and not BIOS. I've installed Windows first and then Debian (like I always did), but system keeps booting straight into ...
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0answers
503 views

Reinstall Ubuntu in UEFI mode alongside Manjaro

I initially had Manjaro installed in UEFI mode. I then used a Ubuntu live USB to install Ubuntu on a new separate partition. I choose the default options and it seems that it has not installed it in ...
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1answer
636 views

efibootmgr Ubuntu 0000 entry reapears after restart

I deleted ubuntu partition from my dual boot. Now I am running only parrot security. Everytime I start my machine it falls into the GRUB error thingy because it automatically boots into Ubuntu, which ...
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1answer
7k views

you haven't created a /boot/efi partition

I am installing scientific linux 6.9 (based on redhat 6) on my surface book . I created 4 partition : 88500MB / ext4 500MB /boot/efi EFI system partitioning 250MB /boot ext4 200MB swap But when i ...
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1answer
1k views

booting gentoo using uefi and gpt

I just used the amd64 minimal installation iso (installed on usb drive) to install and configure gentoo linux with the following make.conf: CFLAGS="-march=native -O2 -pipe" CXXFLAGS="${CFLAGS}" ...
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3answers
701 views

How to do a full incremental and searchable backup of the entire hard drive and partition table?

This used to be easy before this UEFI thing. You just used dd to back up the first 63 sectors, then rsync to maintain a copy of everything in your / partition. Is there any easy way to do the same ...
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3answers
3k views

Secureboot with UEFI bootloader and Grub2 only

I'm working on a linux system and want to configure secureboot. The fun part is that I own all the pieces of the system, including the UEFI boot loader. I was wondering if someone could tell me if I'...
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0answers
376 views

How can I find the source of this unreadable hd0 in grub2?

On boot of a new ThinkServer with CentOS 7 installed after selecting one of the boot menu options in grub (or at the grub command shell if I search or ls), I can see error: failure reading sector 0x0 ...
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353 views

MOK Manager doesn't display when trying to add a new key

I am trying to sign the VirtualBox kernel modules using Fedora 27 with UEFI Secure Boot enabled. I have successfully signed the modules and have run sudo mokutil --import MOK.der where MOK.der is ...
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1answer
1k views

Network boot (PXE) from BIOS/EFI

What is the difference between these two loading schemas? PXE from BIOS. PXE from EFI. I know that firmware passes control to NIC program which is stored in the NIC ROM. This program gives IP ...
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1answer
2k views

Mint UEFI partition suddenly not recognized by UEFI anymore - after booting Windows 7 once

I am dealing with a PC, some off-the-shelve HP office box, a few years old. I had been using it for a while with different flavors or Linux mostly for computing stuff headless. At some point, I had to ...
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1answer
2k views

Can't boot the CentOS 7 that is installed on my USB on other computers

I just install a CentOS 7 by DVD iso on my USB as what you'll do to install normal centos (not live-USB) with my laptop with UEFI boot mode and it can be successfully booted on my laptop too. So as I ...
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6answers
19k views

Kali Linux is Installed but not showing in boot manager

I recently bought a new Laptop: Lenovo IdeaPad 320e Intel i5 7200 2.5GHz processor 8Gb RAM 2Gb NVidia 940mx Graphics 1TB HDD It came with freeDOS so i installed Windows 10 on it on EFI mode. A few ...
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3answers
3k views

Red Hat 7.4: How to inject kickstart file into USB media for UEFI-only system?

I am trying to build an installation image (to be transferred to USB media) for Red Hat Linux 7.4 with a custom kickstart file, and the corresponding ks= argument added to grub, but and can't figure ...
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1answer
924 views

Debian ESP Partition

I am trying to install debain 9 and have a question about partitioning. I install Debian via uefi and use software RAID which distributes my root filesystem and swap partitions to my hard disks. ...
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1answer
2k views

Is there a way to force CentOS to do a legacy-style boot install in the UEFI-style installer?

I've got a strange situation at work, and I have about 700 systems that all are booting to EFI by default. I have a PXE menu set up, and I can install CentOS - but the units need to swap to Legacy ...
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1answer
49 views

Can't mount Ubuntu iso to hardrive partition

I've been trying to dual boot my new laptop (Dell XPS 15 9560) with Windows and Ubuntu. I've done this process before on my Lenovo with no issues using the process outlined in this video so I tried to ...
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1answer
352 views

erratic grub behaviour. Reinstall linux on dual boot!

I had Ubuntu and Windows 10 dual boot, working perfectly fine. Due to slow performance of Ubuntu on my machine, I wanted to replace it with Elementary OS, while maintaining the dual boot. I fired up ...
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2answers
3k views

efi variable entries in /sys/firmware/efi/efivars/

What are entries in /sys/firmware/efi/efivars/? I see that they are small binary files. Are these addresses and the contents of the address? For example /sys/firmware/efi/efivars/BootFromUSB-ec87d643-...
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1answer
296 views

How to realign LVM partition on RAID 1

I got a Debian installed on EFI system with LVM on top of a RAID 1, it's working fine except that fdisk gives me warning # fdisk -l Disk /dev/sda: 1.8 TiB, 2000398934016 bytes, 3907029168 sectors ...
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1answer
159 views

Unable to boot live Linux multiboot USB in UEFI

I have made a multiboot USB stick using multibootUSB, but I can’t get it to work. I think this is because it starts in UEFI, and I don’t want it to boot into legacy mode anyway. It just gives me the ...
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1answer
2k views

Dual boot Windows 10-Ubuntu - Grub, os-prober not detecting Windows 10 partition

Got my Dell XPS 9560 replaced by warranty after motherboard on previous one went bad. Took out the HDD on the new unit and swapped it out with SSD in previous unit. In the past when swapping out hard ...
2
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1answer
1k views

Using UEFI boot mode for Gentoo Linux installation on OracleVM VirtualBox instance after April 20, 2017

I'm installing Gentoo on an OracleVM VirtualBox 64bit instance on my Intel i7-7700k machine. I am assuming my machine and the VM both support UEFI boot mode, but there is a note in the Gentoo Handbook ...
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0answers
42 views

Copying one entire SDD drive to another larger one

My laptop (Dell Latitude E7250) contains a 256 GB mSATA SDD. Call this drive 1. I would like to bring the contents of this drive over to a 1TB mSATA (drive 2), so that my laptop will still boot. ...
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1answer
883 views

No Bootable device issue after Installing Kali Linux - Acer Aspire ES1-533

I have purchased 3 Acer Aspire ES1-533 Laptos , I just tried to install Kali linux , created bootable disk using Rufus , and it was a GPT/UEFI compatible USB drive. But after my installation the ...
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2answers
935 views

Zorin OS, can't boot from USB

I recently installed Zorin OS on my Lenovo Yoga 2. I completely got rid of Windows and am not dual booting. I am now trying to get back to Windows 10. I created a Windows 10 USB drive, but I can't ...
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1answer
3k views

Fedora 27 - unable to boot, grub error?

I just performed a fresh, clean install of Fedora 27 five days ago. Upon a reboot from an update cycle via DNF, I am unable to boot normally or into rescue mode. At the grub menu, I have a generic ...
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1answer
5k views

grub-install error: modinfo.sh doesn't exist [closed]

I entered the following command grub-install --target=x84-64-efi --efi-directory=/boot/efi --bootfloader-id=grub But I get the error grub-install: error: /usr/lib/grub/x84_64-efi/modinfo.sh doesn'...
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1answer
2k views

Debian installation hangs at final GRUB install: “Looking for other operating systems”

I used Rufus to burn Debian 9.2 NetInstall ISO to a USB. No matter what options I choose on Rufus, I always run into the same problem when installing Debian. When it gets to installing GRUB, it hangs ...
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1answer
2k views

Booting straight into Windows, no Grub in BIOS

i probably f*cked up. Yesterday i decided to install Kali Linux along with the pre-installed Windows 10 of my Ideapad 100. One small problem i had though was that i had to change between the "UEFI" ...
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1answer
2k views

Can I switch to Legacy Boot from EFI on Debian Linux?

My motherboard died for an AMD Phenom processor, so I ordered a cheap replacement on ebay. It works, but it's old. I connected my hard drive (it shows a /boot/efi partition in /etc/fstab) to the new ...
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1answer
1k views

Windows 10 UEFI does not allow Grub boot (Kali install)

I am trying to get dual-boot to work. I followed these instructions exactly: https://docs.kali.org/installation/dual-boot-kali-with-windows I have also tried manually setting up the partitions (i am ...
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1answer
833 views

(UEFI Hyper-V) Arch-Linux GRUB never installs correctly

I need to get Arch Linux running on a VM for a university assignment. I've been trying for ages to get it to install under Hyper-V (Windows 10), and I've ruled out most other possible problems, other ...
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1answer
2k views

Booting clear linux live image on usb from old non-eufi/efi computer

I'm trying to boot Clear Linux live image on my Toshiba Satellite C655 but it does not support UEFI or EFI. I'm using a USB 2.0 64GB thumbstick I wonder if there is a method to boot UEFI partitions ...
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0answers
670 views

Install boot manager on USB

I'm quite confused about boot sequence and terminology, so I might bungle this question, but...I'm looking to create a USB-based boot manager to boot an OS (Linux) from another USB stick with its own ...
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1answer
238 views

Linux: About EFI disk partitioning

I'm reading a lot of documentation about partitioning on EFI machines, but I have a lot of doubts I cannot clarify. First of all: I am focusing on a Linux-only laptop. I am not interest in dual-...
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0answers
1k views

How to prevent Windows 10 from clobbering GRUB?

Asking for clarification about: [1] How can I prevent Windows from overwriting GRUB when using a dual-boot machine Christopher's answer says: "Windows will overwrite the boot sector whenever you ...