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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14 views

What is causing efibootmgr to seg fault?

Sometimes seemingly randomly, efibootmgr will get hung or segfault. I have a Live DVD script that will install a new OS and setup the uefi boot with these commands: # Delete any old entries my OS had ...
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25 views

How do I boot into my new Arch dual boot?

I’m a fairly new Linux user, who’s had a dual booted machine for a while. I decided to give Arch Linux a shot, so I followed the install guide on the wiki. At the moment, my machine has one SSD which ...
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UEFI Grub not finding config file

I need to boot Windows and two other Linux distors using Grub. So, I have installed Grub on UEFI partition with a dedicated partition for storing the files used by Grub using the following command. ...
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43 views

How to remove old UEFI boot entry?

Every time my computer boots, I face this GNU GRUB menu: I don't know how to remove it and every time I boot, I have to write exit and then I have to choose the debian entry manually. I've looked ...
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70 views

Cannot boot (any more) from MBR SSD drive even if legacy BIOS is enabled

The situation is simple to describe in fact: A MBR-partitioned Kingston SSD of 1TB containing Windows 10 and Kubuntu was moved to a new (HP) laptop: in order to boot there, legacy support had to be ...
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39 views

How to set default boot partition if I have two EFI partitions?

I dual boot Windows and Pop_OS!, and recently, Windows updated and screwed things up :( I have two EFI partitions on one drive, one small (old) one that I previously used for Ubuntu/Windows, and a new ...
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73 views

Problem with double Fedora installation. mount: /boot/efi: unknown filesystem type 'vfat'. Possible overwritten installation

Some days ago, I decided to install Fedora 33 Jam on an empty partition (sda6) I had created when I installed Fedora 32 Workstation (on sdb1) a couple of years ago. With the intention to finish with ...
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1answer
49 views

mkfs.vfat command not found

I was trying to run the command while installing Arch Linux pacman -S grub efibootmgr But, I forgot to format EFI(dev/sda5). So, I run following command mkfs.vfat /dev/sda5 I am getting that mkfs....
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21 views

A Debian 10 UEFI disk and another Debian 10 MBR disk are on the same computer with NO dual-boot. Can I then select any disk in the BIOS to boot on it?

A reseller is creating a new computer for me. It will have an UEFI Debian 10 on it. He will also add an old MBR Debian 10 disk on it, I will provide to him. This disk is only here to ensure that I'm ...
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14 views

How to remove the “Booting OS” header after selecting an OS in rEFInd?

I am currently trying to theme rEFInd, and, following the documentation, I had no problem changing the background banner and icons to fit my needs. However, when selecting a Linux distribution to boot,...
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PCIe NVMe SSD only found by BIOS after warm boot

I was recently given a Dell Latitude 5511 laptop with pre-installed Windows 10. I chose to replace Windows with Ubuntu 20.04 by letting Ubuntu install on the entire PCIe NVMe SSD (PC611 NVMe SK hynix ...
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1answer
87 views

RAID 1 of /boot/efi partition on Debian

I have a CentOS 8 installation, where the partitioning and RAID 1 configuration where done using the automatic partitioning of the CentOS installer. Here is the output of lsblk: sda 8:0 0 ...
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how i can install arch-linux-x64 on UEFI-32bit

i have a tablet laptop with intel Atom , and UEFI 32 bit i'm using rufus for create bootable usb but usb not able to boot from uefi system i'm found a solution for ubuntu Here by copying a file ...
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66 views

When and why does UEFI need to access the partition table?

I have a workstation with an UEFI firmware and a disk with a GPT type partition table. According to EFI Boot Manager, the the system is instructed to boot from UUID 7e169454-1df0-40bf-9c63-...
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Cannot get Bluetooth to work on Mac Pro 3,1 running Arch Linux

I've been running Arch Linux for about a year and I have never been able to get the Bluetooth working.  It used to not show up anywhere but recently I set up my wireless adapter with wl and when I did ...
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1answer
43 views

Dual Boot install failure of Debian 11/Win 10 on UEFI only (Dell Inspiron 17 7706) system

I tried to install a root-encypted Debian 11 (Bullseye, netinst, daily build 2021-03-29, cryptsetup) next to the existing Win 10 as Dual boot on a strict UEFI-only system (Dell Inspiron 17 7706, BIOS ...
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18 views

How can I get Windows to let me always boot straight into grub

I dualboot Ubuntu and Windows and have 2 SSD's. The first one, 1TB is dedicated to Windows and the other, 500GB is for Ubuntu. I had it setup to boot into Grub but every time Windows would upgrade or ...
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28 views

Ubuntu UEFI entry point missing

I originally had Ubuntu 20.10 installed on my HDD without any booting problem. Days ago my HDD broke down and I decided to migrate to a new SSD. I installed Ubuntu 20.10 on the SSD just like before, ...
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20 views

Change EFI partition umask to 0022 - security issue?

I'm working on a program that needs read-only access to the boot-loaders installed - configurations, types, etc. Since I don't want to give the program root privileges, I was thinking about changing ...
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1answer
48 views

grub-install: info: … but x86_64-efi platform not available

I've installed LUbuntu on a system and it boots nicely in BIOS mode. Unfortunately I need to boot the system in EFI mode, so I booted the stick again. Made sure that it booted in EFI, mounted ...
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22 views

What in machine configuration can prevent booting from iso

Ran into a really weird issue recently I have an ISO I want to install on my server. On all machines I had before it ran smoothly. Now I have got another one and it doesn't detect the ISO when I mount ...
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54 views

How to restore BIOS access on Arch Linux?

I can no longer access the BIOS on my PC. I don't know what caused it, but it must have happened since I installed Arch Linux (my only OS) with UEFI GRUB. I have accessed the BIOS dozens of times ...
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2answers
65 views

Moving from dual-boot (Windows10 / Pop_OS) to single (just Pop); Q's about my EFI setup: 2 EFI partitions?

Last July, as a complete Linux noob, I bought a refurbished Dell e7470 with Windows 10 pro pre-installed. I followed instructions in this video (cued to disk partition steps) to install Pop_OS 20.04 ...
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1answer
26 views

How can I make Windows bootable again on OpenSuse Leap?

I have installed OpenSUSE Leap on an MS Windows (10 Home) laptop and it now only offers Linux in the boot menu. How can I get Windows into the boot menu? Leap is currently 15.1¹, having been upgraded ...
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1answer
316 views

/boot/efi failed to mount due to unknown file system “vfat” : CentOS 7.5

I have a centOS 7.5 server that does not boot up. Only boots up to rescue mode. This happened after a forced reboot of the server. I got the following error on CentOS 7.5 after checking the journalctl ...
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1answer
36 views

EFI stub kernel not booting, but black screen

I'm trying to boot a Gentoo Linux with an EFI stub kernel on a Hetzner AX41-NVME server, but it only shows a blank black screen while the server hangs up. Partition table: root@rescue ~ # sgdisk -p /...
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2answers
67 views

UEFI Resolution Woes

Background I come from using Gentoo, the source based distribution. With that in mind, and 4 hard drives in my PC, I decided to experiment, and possibly switch to FreeBSD. I'm writing this question ...
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1answer
131 views

How to verify signed UEFI binaries?

I'm trying to understand why secure boot works on my machine. It is enabled in the UEFI config, everything boots just fine, and mokutil --sb-state says SecureBoot enabled. But I think it shouldn't. ...
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2answers
139 views

EFI Installation of Devuan Beowulf?

I have switched to a new computer and tried to install Beowulf 3.1.0 in a pure-EFI setting. I have tried installing on a SATA SSD as well as a a m.2 PCIe SSD. Originally, the plan was a dual boot ...
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10 views

Can't find few nvram variables like “Setup” at the /sys/firmware/efi/efivars

I'm able to find a list of nvram vars like SetupMode, SecureBoot n all. But some of the vars are not visible. Example : Setup I have even created a similar varstore like Setup, even that isn't visible ...
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1answer
73 views

Configuring GRUB in a USB debootstrap environment

I run Debian Testing on a Dell Latitude E5450. I created a USB environment with debootstrap following the instructions posted here, and here. As per those instructions (and others), I mounted my ...
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manually certified virtualbox kernel modules. difficulties. everything okay now?

So I have efi-secure-boot installed and while installing vbox during reboot I forgot to switch to enter-key. so afterward I got the same errormessage as here i first followed the instruction on the ...
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2answers
32 views

Why grub for efi is still installed on fat32?

Isn't fat32 a deprecated filesystem format? Why does grub for efi booting is still required to be installed on a fat32 partition?
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39 views

UEFI - Windows 10 /Ubuntu 20 Dual Boot on a separate SSD starts in grub prompt - hd1/sdb not recognized

So, I read a lot of posts and answers about this, but maybe my case is... too specific? I have a not-so-old Hp notebook (2-3 years old). I removed the DVD drive and added a Kingston SSD via caddy. The ...
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162 views

Boot tiny core linux in uefi mode

I was trying to tweak Core linux to boot in uefi mode, but it's only working in legacy mode and i don't really know how to start with it, i tried copying efi from ubuntu server install but i just ...
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1answer
62 views

UEFI boot via grubx64.efi: does it support http linux kernel in grub.cfg?

When boot a UEFI machine with bootx64.efi(and grubx64.efi in turn) via appropriate DHCP configuration, is it possible to config the grub.cfg with http linux kernel like the following? menuentry 'xxx' {...
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2answers
33 views

Does GRUB format your ESP?

I am installing Arch Linux on my laptop that came preinstalled with Windows 10 and after several times of restarting, I realised that you needed to install a bootloader because pacstrap doesn't do it. ...
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16 views

How to install UEFI ASUS boot loader in the restored Linux data?

I took a backup from my Linux (partition in the complete method) and now I would like to restore the backup in the ASUS laptop but on this laptop, we need to install UEFI boot loader to start our OS ...
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45 views

PopOS Bootloader not providing option to boot into Windows

I have installed Windows on my system's primary nVme drive, and PopOS on the second sata drive on my system, I was hoping to be able to use grub to boot between my Windows and PopOS install (Instead ...
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17 views

Installing Windows broke my Linux instal and prevents UEFI booting of any kind

I had an artix linux UEFI install, no encryption. Later I installed windows, and unplugged all other drives and installed Windows to a 120gb ssd. No other drives were plugged in when I installed. I ...
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3answers
2k views

Kali ate my Windows 10 :(

I know other questions similar to this have been asked, but I think this situation is a bit different. System is a Lenovo T430 with 2xSSDs (one is in the optical drive bay). Original install was Win10 ...
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26 views

How to get Windows boot again

I formatted the drive that contained Ubuntu Budgie, from MS-windows. Then I opened cmd with administrator privileges and head to diskpart and removed the Ubuntu directory from there, but maybe ...
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69 views

How to resize EFI partition to install pop!OS if the consecutive drive is encrypted with bitlocker?

I have a dual boot with ubuntu and windows. My partitions look as shown in the picture now during installation Pop OS requires you to have at least 500MB for /boot/efi partition but I have 260 MB. But ...
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1answer
35 views

GRUB booting issue

I have arch and Ubuntu and windows 10 installed on my system. I had installed Ubuntu before arch hence I already had the grub menu offered by the Ubuntu. But after installing I can see another ...
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83 views

Issues with booting a custom Kali Linux Live USB on computers with Secure Boot

As a project for a portable copy of my VM workspace and for later use in recovering dead drives (my main laptop is a 2015 model so data rescue is something to be concerned about), I’m trying to create ...
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27 views

How to fix Systembootorder

I tried to install Linux Mint Cinnamon on my Acer laptop, but after the installation there comes up a grub bootloader screen with this text. https://ibb.co/P9r0hpw So what can I do? It's now enough ...
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554 views

Arch ─ 'grub-install: error: efibootmgr failed to register the boot entry: No such file or directory'

My Current Situation I'm trying to install Arch Linux following this tutorial: https://youtu.be/PQgyW10xD8s?t=1476 (URL at current time). As he did, I created the /boot/EFI directory and mounted the ...
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179 views

Cannot set EFI variable Boot0000. No space left on device

I have a dual-boot of Debian 9 with the grub bootloader that I'm trying to upgrade to Debian 10. The steps I've taken so far are going through are here. The step it failed on was after I updated and ...
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75 views

Issue with GRUB/EFI after installing Ubuntu on Dell R820

I should preface this by saying that I'm a linux noob, so if I misuse or misunderstand terminology I'm sorry in advance. Also, there's a good chance I made a mistake when troubleshooting or trying ...
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1answer
63 views

Multiple EFI partitions, can I delete one?

I needed to remove all Microsoft partitions because I want to do a fresh install of Windows 10. I found a 1GiB large ext4 partition (/dev/nvme0n1p1) at the beginning of my SSD, which I am unsure about ...

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