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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How and when is `/sys/kernel/security/tpm0/binary_bios_measurements` exposed?

Currently, I try to understand how a measured boot is working and what components log what in which pcr of a tpm2. I have a test-setup with uefi-secure boot enabled and a tpm2 attached in a kvm ...
user3046582's user avatar
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1 answer
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Grub2 is not using kernel grubby provides me. grub.cfg problem?

I am using the linux surface kernel on Fedora 39, which I want to use as the default kernel GRUB2 selects on startup. It got set up as default kernel before and it worked, but then I changed GRUB ...
Conjuror4735's user avatar
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1 answer
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correct path for arch linux system /boot/ - x64 laptop uefi machine, GPT partion table

after a rebuild from arch live usb iso, my boot directory is: The tree is correct? Or there is a mistake? I know that the system boot up correctly so I should not modify anything, but i need to ...
Alessandro's user avatar
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1 answer
48 views

How do I enable UEFI secure boot for a linux build made with yocto?

I'm producing a yocto build, and want to enable UEFI Secure Boot on the intel machine I'm using. This is a pretty basic yocto build, using core-image-minimal and meta-intel. The artifacts it ...
Dave's user avatar
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1 answer
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Create UEFI/BIOS chip dump from within Linux

Some people recommend using flashrom to create backup dump of a PC's UEFI/BIOS SPI flash contents. However, flashrom does not work with all platforms. Sometimes people recommend finding the address ...
Melab's user avatar
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Create, update, modify, and delete UEFI authenticated variables from userspace in Linux

I've been searching for, but cannot find any information or utilities for creating, deleting, modifying, and updating arbitrary authenticated variables in Linux from userspace. Sure, there are tools ...
Melab's user avatar
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3 votes
1 answer
146 views

syslinux UEFI boot: automatically select boot option based on HW identifier

I am booting from USB media, and I am using syslinux EFI boot. I am booting the same media on 2 different laptops, and I have 2 menu options in syslinux.cfg, one for each laptop. Currently, I have to ...
Martin Vegter's user avatar
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112 views

I can't Install any Linux Distro on new AMD Ryzen 7 5700U Mini PC

I'm trying to install Proxmox on a new Mini PC (GMKteck NucBox M5 Pro Mini PC) but keep getting the following error : EFI boot mode detected, mounting efivars filesystem mount: /sys/firmware/efi/...
mrsmith's user avatar
1 vote
1 answer
37 views

How can I manually install a Yocto image?

I'm having difficulties installing an image I've built with Yocto. In the past I've always used u-boot, MBR, and legacy boot. Installing Yocto meant creating boot and rootfs partitions, installing the ...
Dave's user avatar
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Question about what Timeshift restores with UEFI system and BTRFS filesystem

I am curious how Timeshift restores will work with my system configuration which includes UEFI and a BTRFS formatted system partition. First, here's some information about how my system is organized: ...
greyseal96's user avatar
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Update NVRAM so that shimx64.efi is run instead of grubx64.efi on Debian system for secure boot

I want to configure my Debian to boot with secure boot enabled but it doesn't and here is why... OS specific boot loaders are stored on the ESP partition which is mounted in /boot/efi Debian system ...
metablaster's user avatar
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1 answer
42 views

Convert MBR/BIOS to GPT/UEFI (infodump)

I wanted to upgrade my 1.5TB HDD to a 4TB SSD, none of the internet resources I found correctly matched my situation from beginning to end, and I ended up spending about 20 hours getting it to work, ...
Erhannis's user avatar
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1 answer
27 views

Trying to dual boot Windows 2016 and Centos 7 - won't boot if drive set to UEFI

Motherboard: SuperMicro X11SCA-F, BIOS v2.2 I installed Windows 2016 on a 2TB nvme drive, which booted and worked as I'd expect. I then installed CentOS 7.9 in the spare partition, then rebooted. It ...
Jim C's user avatar
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Why Atom Z2760 won't boot live GNU/Linux

I'm trying to install any GNU/Linux distribution (Debian, Archlinux, Ubuntu...) on Acer Iconia Tab W510, with 32bits UEFI and Atom Z2760 processor. After preparing the ISO with correct EFI files (as ...
Félicien's user avatar
1 vote
1 answer
81 views

Multiboot Windows 10 and Linux, Windows not seen, EFI problems

After crash of an old HD disk, I bought a new SSD and would like to setup multiboot Windows 10 & Linux but I run into UEFI problems. My disks: /dev/sda is the new SSD. Linux Mint 21.3 is on /dev/...
user509010's user avatar
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1 answer
37 views

Change from /boot/efi to non boot/efi

I have a Debian server A with given partition from lsblk and Debian server B with root partition. I would like to convert server A same as server B. Basically I don't want the server A with /boot/efi ...
codelearner1029's user avatar
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1 answer
230 views

"error: /boot/vmlinuz-6.6.9-amd64 has invalid signature" with secure boot on in Kali Linux

When I try to run my Kali Linux system with secure boot on, GRUB returns error: /boot/vmlinuz-6.6.9-amd64 has invalid signature. I don't want to turn off secure boot. I have followed the directions ...
horsey_guy's user avatar
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1 answer
56 views

Flash drive with ISO not seen in BIOS or not booting at all

I've got a problem. I cannot install any OS and I don't know why. I as usually copied artix linux iso to my flash drive to install it on server. Then in BIOS settings, drive didn't appear till I ...
username's user avatar
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63 views

Booting Existing Linux Installation in qemu VM

There are 2 separate arch installations on my machine, one on an nvme drive and another on /dev/sda (EFI in /dev/sda1 and root in /dev/sda2). Trying to boot the arch on /dev/sda from inside the arch ...
Loma Harshana's user avatar
1 vote
1 answer
257 views

How do I boot from an NVMe disk without bios support?

I have a system which I want to boot from an NVMe disk (via a PCIe riser). The system is UEFI capable, I can boot from a USB disk and install the OS (TrueNAS Scale) to the NVMe disk, and the OS shows ...
phemmer's user avatar
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dpkg error grub-efi-amd64-signed

I am currently facing a perplexing issue while attempting to install DragonOS on VMWare, and despite several efforts, I have been unable to resolve the error outlined below. I have performed a fresh ...
Apis's user avatar
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109 views

Debian based guests sometimes boot into UEFI shell qemu

My host runs Debian 12 and is used as a hypervisor using QEMU and libvirt. I have several Debian based server VMs and they almost always boot into UEFI shell instead of normally. I still can boot by ...
td211's user avatar
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-1 votes
1 answer
29 views

CD-ROM drive fails to open/recognize inserted cd in Legacy boot mode

Recently I wanted to check that I'm able to read cd/dvd disks. No my surprise my "old" laptop failed to do so. After investigating today I've found out cd drive works on Linux Mint 17.x ...
Alex Martian's user avatar
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Failed boot after changing Nvidia driver

[CONTEXT BELOW] I do not get past the Linux Mint logo. Before the Linux Mint plymouth, and after the constructor's logo, the following can be seen: [0.211338] ACPI BIOS Error (bug): Failure creating ...
Clément Radio's user avatar
1 vote
0 answers
148 views

install & configure grub within debootstrap chroot

i have a big knowledge gap in bootloading, thats why i'm actually practicing learning by doing. I have a dedicated test server and try to install linux over hetzner rescue with debootstrap. (Writing ...
yFStein's user avatar
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3 votes
1 answer
236 views

Encrypted boot partition: advantage of encrypted boot partition

I would like to understand more about the Linux boot process and how encryption works for the boot partition. I have a few questions. I know that a UEFI system must have a ESP partition, which can be ...
LaserBeam's user avatar
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0 answers
65 views

Ubuntu Boot-Repair stuck at "applying changes"

Windows 11 updated and it break the booting process of Ubuntu (Zorin OS 16.3). So now after booting I get: Unexpected return from initial read: Volume Corrupt. buffer size 1000. Failed to load image. ...
Pychu's user avatar
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1 answer
100 views

Grub with UEFI: Local Debian doesn't boot after another installation on external SSD

I have a ThinkPad laptop with BIOS enabling UEFI mode only (no legacy). It has both Windows and Debian12 installed as dual-boot options - selectable on start via Grub. Recently my son decided to use ...
user1876484's user avatar
1 vote
0 answers
23 views

How to sset up your own secure boot keys to be used

Im trying to get the benefits of secure boot but i dont trust MS to sign stuff. Is there a easy way to both set up secure boot and have new kernel (i think kernel is updated via apt) get auto-signed? (...
Downvoter's user avatar
0 votes
2 answers
74 views

Is it safe to delete an EFI partition that is likely a residual one left behind by Ubuntu

I have two disks on my computer: an SSD on which my windows is installed and a HDD which had my ubuntu. I recently deleted Ubuntu and now have the space left as unallocated space on my disk. I am ...
RaggedDoll's user avatar
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0 answers
118 views

How can Linux hibernation be enabled under UEFI Secure Boot on RHEL / RockyLinux / AlmaLinux?

When running under UEFI Secure Boot with a current Linux distribution, "kernel lockdown" will be instated. Multiple kernel messages along the lines of Lockdown: swapper/0: hibernation is ...
AlexK973's user avatar
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1 vote
1 answer
316 views

Boot problem after cloning

Guess this is the first time I post a question here. Have been playing with Linux and VMware servers for more than 10 years now. Lately I decided to move my focus on Debian desktops and ProxMox (again)...
Steijn van Essen's user avatar
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0 answers
1k views

How to fix ubuntu boot problem caused by previous linux installation

My Ubuntu 23.10 won't boot smoothly right after installation. The laptop just drop into the "grub mini-bash" black screen. Temporary cure is to press F8 on boot which instructs the BIOS to ...
xrfang's user avatar
  • 215
0 votes
2 answers
148 views

BIOS and Windows issues after installing Pop! over Ubuntu after creating new boot partition

Recently, I tried to install Pop! OS on my system over my pre existing Ubuntu 22.04 installation. I have an Acer Nitro 5 with a 256 GB SSD (on which my windows is installed) and a 1TB HDD (on which I ...
ekl1pse's user avatar
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0 answers
486 views

Debian 12 UEFI boot option erased after upgrading

I've installed a Debian 12 on my Dell Latitude 5470 laptop. But I had to add a UEFI boot option in the bios to prevent the No bootable device found message. I did as follow: Reboot and press F2 to ...
Duddy67's user avatar
  • 109
0 votes
0 answers
75 views

The attached virtio disk is not recognized by libvirt but it is recognized by qemu

I'm trying to virtualize FreeBSD 13.2 for arm 32 bit on my laptop ARM Chromebook where qemu is version 5.1,KVM is enabled,libvirt and virt-manager are installed from the source code and everything ...
Marietto's user avatar
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1 vote
2 answers
1k views

Fix Linux grub with boot-repair with an old BIOS PC and a GPT drive?

I have a GPT formatted SSD Drive that I have moved from a rather new laptop to an older one that has an old BIOS. The Linux systems installed on it work fine (Kubuntu 22.04 and Mint 21), although I ...
cipricus's user avatar
  • 1,480
0 votes
1 answer
310 views

Bricked my PC trying to setup secure-boot

I have dualboot (windows & arch), i was trying to setup secure boot in arch using sbctl. But i think i ran the wrong command and bricked my keys. Now when i startup computer, it get stuck in blank ...
Igor UnderPlayer's user avatar
0 votes
1 answer
32 views

Seagate Pipeline HD hard-drive not found in Asus UEFI bios

Seagate Pipeline HD hard-drive not found in Asus UEFI bios. Though when the machine is booted into Arch Linux with a live usb on the same machine it shows up. Hard-Drive Model Name: Pipeline HD Model:...
TNP's user avatar
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3 votes
1 answer
608 views

How can I boot a BIOS-mode platform on an UEFI station without CSM?

Is it possible for GRUB or SuperGRUB to boot a platform like Debian on an UEFI station, without using CSM? What's actually preventing that?;)
Jason Hunter's user avatar
2 votes
1 answer
156 views

Failure to start system from EFI shell

While attempting to install Mint 21.2/Manjaro 23.0.1 on Irbis TW60 (system specs) I was dropped into an EFI shell. Booting from it is not possible, as outlined below. What is known: Secure Boot is ...
Alex Komyakov's user avatar
1 vote
1 answer
536 views

how to clone UEFI bootable USB disk onto another disk (possibly of different size)

How can I clone my existing UEFI bootable disk, so that the copy is identical? I have tried creating new bootable disk, using same procedure, same label name, and same UUID and PARTUUID labels for the ...
Martin Vegter's user avatar
0 votes
0 answers
453 views

How to boot from fully encrypted root partition using systemd-boot - PopOS style?

While attempting a dual-boot setup on my laptop, I accidentally deleted the original bootloader that was automatically installed with the GUI. I followed this guide: System76 Bootloader Guide. However,...
Andrius Solopovas's user avatar
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0 answers
36 views

Problems with booting same Linux installation on both physical System and VM for dual use

The question basically boils down to "how does a Linux installation need to be setup in order to be able to do boot from both VM and the physical machine?" I try to achieve 2 goals with this ...
NooseN's user avatar
  • 1
0 votes
1 answer
65 views

Make a custom, signed EFI executable? (safeboot.dev)

I'm new Linux, I've used Xubuntu for the past three months so I only know the basics. Recently I came across safeboot, which basically wraps up complex stuff to secure your system. While reading the ...
ccfoo03's user avatar
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1 vote
2 answers
101 views

cannot mount vfat partition after running efibootmgr

I have created partition on my USB disk with parted parted /dev/sdb mklabel gpt mkpart boot fat32 0% 1024MB set 1 esp on set 1 boot on then I formatted the partition mkfs.vfat -F 32 /dev/sdb1 ...
Martin Vegter's user avatar
0 votes
1 answer
500 views

modprobe: ERROR: could not insert 'efivarfs': No such device

when I run efibootmgr command: efibootmgr --create --disk /dev/sdb --part 1 --loader /EFI/syslinux/syslinux.efi --label "Syslinux" --unicode I get this error: EFI variables are not ...
Martin Vegter's user avatar
0 votes
1 answer
118 views

Convert i386 LVM Ubuntu 16 installation to UEFI

I am trying to convert my legacy bios LVM-based Ubuntu 16 installation so that I can run it on a NUC that only supports UEFI. I have been round the houses on this: Boot-Repair - doesn't work chroot ...
Andy Piper's user avatar
1 vote
1 answer
4k views

How to install debian 12 with full disk (boot too) luks2 encryption grub2, lvm UEFI?

This is a laptop with an SSD. The debian installer defaults are for luks2. Using these breaks the install at the grub part, as the latest grub version doesn't support argon2id PBKDFs. argon2id is ...
info-cppsp's user avatar
0 votes
1 answer
481 views

create a UEFI bootable CD with ISOLINUX

How can I create a UEFI bootable CD ? ISOLINUX has no mention of UEFI: https://wiki.syslinux.org/wiki/index.php?title=ISOLINUX while SYSLINUX does, but specific to syslinux: https://wiki.syslinux.org/...
Martin Vegter's user avatar

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