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.
978
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27
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Unable to mount /boot/efi and Grub menu not updated
I discovered after updating and rebooting a centos system that it still shows an old grub menu and the new kernel(s) are not there.
After bootup the links from /etc/grub2.cnf were broken. I recreated ...
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1
answer
26
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Passing a boot menu option to GRUB on a Live USB drive?
I have an ubuntu system, and I want to have a semi-automated way of running a clonezilla unattended image / re-image from a USB drive.
To that end, I've modified the GRUB menu items to be along these ...
- 101
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41
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What is a minimal kernel configuration that boots with UEFI on aarch64?
I've been playing around with some UEFI firmware I downloaded for Raspberry Pi, and I've also been trying to get the Raspberry Pi Kernel to boot with UEFI. So I simply ran make -j4 bcm2711_defconfig ...
- 66
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1
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45
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Cannot dualboot Linux (nothing helps)
I konw I know. Probably the 1000th post about this but I really feel like I have tried everything.
Grub2Win, BootRepair. Manually reinstalling grub from live usb stick.. Nothing.
So A while ago I had ...
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56
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Restoring timeshift backup on luks encrypted file system
after crashing my luks encrypted home partition I rebooted into my manjaro live usb stick and reformatted my ssd as I did before.
300mib efi -> flag:boot
16gb swap -> flag:swap; luks
120gb root -...
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0
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39
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Maintaining multiple UEFI partitions
Currently, I have 6 internal drives with 6 different OSes (Windows, Ubuntu, Fedora, Debian, OpenSUSE Tumbleweed, Arch Linux) installed on each of them. Each drive has its own EFI partition, so that I ...
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1
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155
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Fedora 37 reboot after update - Grub Out of Range Pointer and not able to rescue boot w/ USB
After a regular Fedora 37 update last evening, I rebooted my home server (actually a Fedora Workstation 37 but with lots of extras). I went to log in this morning remotely and ... no connection. Upon ...
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1
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48
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PC not booting up after dual booting Linux alongside windows
I tried to dual boot Linux mint-21 on my windows 10 computer using a live USB.
During the installation I chose the "free space" as a ext4 partition and proceeded to install. Linux installed ...
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0
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62
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GRUB starts in command line/terminal mode
I tried everything already, including all the solutions from this post (which present exactly the problem I'm facing) : GRUB starts in command line after reboot
I also reinstalled everything, and ran ...
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44
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What does (any) Windows do to EFI partition during an update (in general)?
If someone has any information about Windows update actions, please share.
I'm currently running Pop!_OS 22.04 (and other several temporary distros) and booting to it through rEFInd. So, I heard a lot ...
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69
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Old Macbook (white plastic body Macbook 3,1) with Ubuntu shows grub shell when booting
I have an old Macbook (white plastic body Macbook 3,1) which I use for driving my telescope. Recently I installed Astronomy Linux (Ubuntu) on it (https://sourceforge.net/projects/astronomy-linux-21-04/...
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28
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How to install new linux OS in place of old one if old one had / and /boot partitions while dual booted with Windows?
I've got dual boot with Windows and I'm wondering how to install and replace the Linux OS if it has /boot/efi for Windows and Linux and / partition.
I need to use blivet GUI and it's Fedora 34 (I have ...
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94
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Problems with dual boot after linux pop os installation on a windows machine
I recently put a 128 GB SSD that i found lying around my house in my laptop. I then wanted to install Pop OS on it. I flashed it on a USB and did a Custom Installation.
The problem
I have a boot/efi ...
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13
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Pop OS 20.04 Firmware Tool
Distribution: Pop OS 20.04
Motherboard: X-570 Tiachi CPU: Ryzen 9
5900X
When I first initiated this system it was able to view the firmware in the provided Pop OS tool. I really liked this feature. I ...
1
vote
1
answer
70
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Unable to install on UEFI anymore
I have an Acer Aspire E15 Start computer with which I have had a problem for a long time and which I cannot solve today.
One day I tried to install the latest version of the Debian operating system on ...
- 21
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37
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Splash file (bmp) with UKI (efi) file with dracut or mkinitcpio
I want to use a splash file converted from a JPG to a BMP (required by dracut and mkinitcpio when making a UKI file). I've been successful with only one such file, but I don't know why.
The kernel ...
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1
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Is the /boot/grub2/grub.cfg file relevant on Rocky Linux using EFI?
On all my system (efi and classic) I usually use
grub-mkconfig -o /boot/grub2/grub.cfg
on Rocky Linux 8 I see on efi the grub.cfg is located on
/boot/efi/EFI/rocky/grub.cfg
Is the file /boot/grub2/...
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1
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98
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Removing bootloaders in efibootmgr
Which of the boot managers are safe to delete?
I have a bunch of extra boot managers on my computer. I currently have arch linux installed on it. I learned from efibootmgr that among the bootloaders, #...
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282
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Grub loads unsigned kernel with secure boot enabled
I am currently dual booting Gentoo and Windows (on two different disks). I boot on the linux drive with grub2, where I can choose either Gentoo or Windows (added by os-prober).
Recently, I updated ...
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0
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52
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Can't boot OS installed in UEFI mode
My laptop is an Acer Aspire e15 Start.
The laptop BIOS has two boot modes: UEFI or Legacy.
When I install any operating system (either Linux or Windows) in UEFI, at the end of the installation and ...
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1
answer
88
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grub on efi loads kernel but will not boot it
insmod normal
insmod btrfs
insmod part_gpt
set root=(hd0,2)
menuentry 'Ubuntu' {
linux /boot/vmlinuz root=/dev/sda2 ro
initrd /boot/core.gz
boot
}
Hi, I am learning how to ...
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1
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616
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arch linux cannot mount /boot/EFI unknown file system vfat
I got that error on arch linux after booting: cannot mount /boot/EFI unknown file system vfat. I downgraded the kernel and now everything works, but what should I do now? How do I fix this?
EDIT: ...
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1
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119
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HP EliteBook 840 G1 with issues booting Ubuntu after converting to UEFI
I recently migrated my system to UEFI boot.
The system is a HP EliteBook 840 G1, with a SATA hard disk. Ubuntu is the only operating system.
I converted the disk to GPT, added the necessary partitions,...
- 985
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2
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68
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archlinux in a different HDD
I have a PC with a mechanical interrupt in order to enable different hdds and use different OSs. Windows has bee installed with bios legacy and I am trying to install archlinux-uefi.
At the end of ...
- 31
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2
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1k
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First time installation of Fedora from bootable USB fails to boot
After the bootloader, the last thing I see before systemd fills my screen, and then it goes blank, is the following:
I am trying to install Fedora 37 to replace my current Windows 10. Mo matter if I ...
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1
answer
116
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Debian install on removable media - grub makes 2 efi entries - unable to boot efi
So I'm trying to install debian on a 64GB USB so i can move it anywhere. I've installed arch before and it worked great, but upgrading the system on a slow connection just for installing an app is ...
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1
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125
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Bitlocker requires recovery key after debian upgrade
I have dual boot configured on the same disk. There was Windows 10 (encrypted by BitLocker) on the first partition and Debian (bullseye encrypted by LUKS) on the second one. Moreover there was secure ...
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90
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arch-linux entry disappeared from bios boot
I had to replace my disk for some time and after putting it back the linux is no longer available in the bios boot menu. Also this ASUS bios is not allowing to load an efi image (ASUS CM6731 version ...
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2
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90
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Secure Boot & admin password
I have a PC with a mechanical interrupt in order to enable different hdds and use different OS.
Windows has bee installed with bios legacy. I want to install in the other HDD archlinux.
When I try ...
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1
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387
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What is this update exactly designed for? (new BIOS?)
I own a rather older piece of server, Dell PowerEdge T20, with the latest BIOS version A20, link to Dell updates, screen of the update in case link goes dead in time:
This morning, when SSH'd into ...
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258
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Are MOK (Machine Owner Key) deleted after OS reinstall or Secure Erase (Data Wipe) on BIOS/UEFI level?
Some time ago I have installed Ubuntu 22.04 and installed proprietary nvidia drivers on it. That triggered creation of the new MOK (Machine Owner Key). In a meantime I have decided to reinstall the ...
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0
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43
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What's the current status of the "sudo rm -rf /" UEFI-bricking bug?
There used to be a bug several years ago where rm -rf'ing your system, due to mounted efivars, actually bricked the motherboard due to shoddy uefi boards. What's the modern day status of that? Is that ...
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66
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Grub "no such device: ID" unless BIOS is accessed first
The core issue is my laptop bios, that i know for sure, but infortunately, i can't change it anyway after flashing a newer version.
My Main OS is stored on my SSD
My old OS is stored on my HDD, this ...
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0
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33
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Why is there a difference between RAID order and Linux device order?
I create 2 virtual disks. one is RAID 0(HDD0). another is RAID 1(HDD1, HDD2).
I chose physical devices in order.
But, After I install OS, I found there is difference between RAID order and Disk order.
...
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1
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161
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grub-install does not create EFI binary with correct modules
I'm trying to set up full-disk encryption on a KDE Neon system (by, of course, following the Arch Wiki guides on the subject). Some relevant information about the setup:
The system has two top-level ...
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1
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299
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How to get UEFI firmware settings back?
I had a Windows and Ubuntu boot USB and running fine
until I installed a Kali Linux USB bootable.
Now I can only use Ubuntu and Kali. I cannot access Windows OS boot manager nor UEFI firmware after ...
1
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1
answer
300
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Unable to mount root filesystem in LFS
Lately, I've been building an LFS [Linux From Scratch] system for my Raspberry Pi Single Board Computer, and I'm currently on the very last step. I'm attempting to compile Linux 5.19.2 from the ...
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2
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672
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How can I delete boot entries?
I've been having some trouble with my system when trying to install/update kernels, and similar operations; commands like # bootctl install result in no space left on the device.
I have tried deleting ...
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143
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How to install Grub2 on a newly created GPT partition?
I have an Ubuntu system, installed on a wired, (legacy BIOS bootable) USB HDD, that I would like to convert to UEFI boot.
I was trying to follow this: https://gist.github.com/cjyar/...
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Writing UEFI variable in kernel module fails with code 2 (EFI_INVALID_PARAMETER)
I'm writing a kernel module that creates/sets a UEFI variable using the linux/efi.h library. Here's my code so far
efi_status_t status;
efi_char16_t name = L"Teste01";
u32 attr = ...
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1
answer
132
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How would a Linux driver call UEFI firmware presented functionality?
For work I'm learning more about computer architecture and I just finished learning about ACPI. From talking to some other engineers my understanding for something like NVMe is that the OEM is going ...
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164
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EFI won't load linux kernel in LFS
Lately, I've been building an LFS [Linux From Scratch] system for my Raspberry Pi Single Board Computer, and I'm currently on the very last step. I'm attempting to compile Linux 5.15 from the ...
- 66
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1
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102
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System76 Galago Pro fails to boot
I tried to install Debian11 and other Debian based distros on my System76 Galago Pro device and all failed to boot except the in house developed PopOs!.
Plot twist the same installation works on a ...
- 145
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0
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33
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Archlinux Installation went wrong
I want to install Archlinux on my new laptop.
So, I was following the steps of this video https://www.youtube.com/watch?v=DPLnBPM4DhI&t=1886s&ab_channel=LearnLinuxTV.
I assume I made a mistake ...
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1
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284
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memtest86+ cannot boot via systemd-boot EFI
Recently has been released version 6 of Memtest86+ which finally introduce UEFI support.
Now, I use systemd-boot as boot manager, so I'd like to launch memtest86+ directly at boot.
I set up a ...
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100
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Is ddrescue/dd cloning compatible with GPT/UEFI boot?
I used ddrescue many times for failing HDDs with MBR partition tables. It always worked perfectly and if the failing HDD was bootable, the clone booted, too.
Now I have a possibly failing SSD, but ...
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2
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1k
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Does Debian 11.5 really need 500MB+ partition for EFI?
I have installed Debian 11.5 on thin client. It has relatively small 16GB eMMC memory for storage.
During installation partitioner in "standard" mode created 3 partitions: EFI (508MB), root (...
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3
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145
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Which file does UEFI execute?
I would like some clarification on the UEFI booting process. The screen shots below show my current configurations.
I need some clarification on which file UEFI executes. Does UEFI execute /boot/efi/...
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0
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510
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How to boot using EFI with custom Ubuntu 22 image?
I have a customized Ubuntu ISO, generated with genisoimage until Ubuntu 20. Unfortunately, Ubuntu 22.04 removed isolinux from its ISO, see here: https://github.com/covertsh/ubuntu-preseed-iso-...
- 101
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1
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110
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I have Windows installation on NVMe and Installed debian on a SDD partition. PC only booting in Windows, can't use Debian
This is a lsblk output from a live USB with pop_OS used to access to my files, sda and nvme0n1 are the important disks.:
NAME FSTYPE SIZE MOUNTPOINT
loop0 squashfs 2.5G /rofs
sda ...
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