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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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 ...
OCDkirby's user avatar
  • 161
5 votes
1 answer
1k views

Chainloading an efi file sitting in.an ISO

I have an iso file on disc I want to boot. It contains an efi file in it. I can mount it as loopback, but I get an error saying 'invalid root' when I try chainloading. I've tried setting root to loop ...
saga's user avatar
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5 votes
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13k views

Backup GPT table is corrupt. Fix will disappear at reboot

My recently installed ubuntu 16.04 system is not behaving correctly (does not boot). I did check the status of the hard drives using fdisk and I discovered that somehow the backup GPT table is corrupt....
igon's user avatar
  • 151
5 votes
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9k views

Black screen after booting in UEFI installation of Arch Linux

My laptop is Asus K53SV, you can find its specification here. I tried to install Arch Linux with UEFI boot method, and I stuck at a black screen after press Arch Linux archiso x86_64 UEFI CD. Firstly, ...
trequartista's user avatar
5 votes
0 answers
5k views

Grub2 can't detect Windows 10, Dual boot on two harddrive, UEFI/GPT system

I have two ssd which there is Windows 10 on the /dev/sda1 and OpenSuse on /dev/sda3 (/dev/sda2 is for a storage hdd). I have been installed Ubuntu on my /dev/sda3 couple months ago. But because of ...
cavitsinadogru's user avatar
5 votes
2 answers
3k views

Updating kernel versions when booting from rEFInd

I'm booting from EFI using the awesome rEFInd bootloader. I've so far had to configure boot myself by manually copying over my EFI-compatible linux boot image to my EFI partition and writing a ...
Naftuli Kay's user avatar
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4 votes
1 answer
405 views

How to pass extra options to OpenBSD's EFI boot loader with systemd-boot?

I have an extra systemd-boot entry for OpenBSD. $ cat /boot/loader/entries/bsd.conf title OpenBSD efi /extra/bootx64.efi It works and I manage to get into boot shell, The problem is that by default ...
andreoss's user avatar
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systemd Failed to start Store a System Token in an EFI Variable

A few weeks ago I started seeing this error in the journal after each boot. I believe it is related to a recent systemd update. systemd[1]: Failed to start Store a System Token in an EFI Variable. ...
MountainX's user avatar
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uefi bootloaders for distributions

I have stared reading about uefi recently and got to know that SYSLINUX and GRUB2 have their own uefi bootloader. i have few confusions specially in terms of pxe boot. 1) Are distributions use their ...
Rajnish Kumar Soni's user avatar
4 votes
1 answer
1k views

UEFI-support for Debian Live-build

I'm building a custom Debian using live-build, and after dd-ing the iso to the USB-stick it boots fine on BIOS-computers, however it does not seem to support UEFI, thus not booting on newer computers. ...
MartinSuecia's user avatar
4 votes
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6k views

generating redhat 6.5 UEFI iso using mkisofs

i am able to generate uefi iso using mkisofs -quiet -R -J -T -no-emul-boot -boot-load-size 4 -boot-info-table -eltorito-alt-boot -e images/efiboot.img -no-emul-boot -c isolinux/boot.cat -b isolinux/...
Kevin Parker's user avatar
4 votes
1 answer
817 views

UEFI boot Fedora from USB 2.0 on 3.0 port (l75d-a7280)

I'm trying to make a bootable usb in ubuntu for fedora, but my settings are not working. I formatted the USB with FAT & Ext4, MBR, and Legacy BIOS bootable. My BIOS allows the USB 3.0 controller ...
user avatar
4 votes
1 answer
2k views

How do I dual-boot 2 (or more) Linux distributions with gummiboot and UEFI?

I have Arch installed as my main OS with gummiboot for booting. I'm planning to dual boot with Fedora 20 soon but I am currently held back by some doubts. Do I need to install Grub2 for Fedora even ...
baktin's user avatar
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3 votes
3 answers
6k views

GRUB command line. Have to boot manually

Somehow my grub got corrupted while updating my Pop!_OS System. I rewrote the partition, grub-install, boot-repair, I tried anything. Well, I can boot by typing the following lines. set prefix=(hd1,...
Ven's user avatar
  • 31
3 votes
0 answers
701 views

Create redundant grub bootloader on Debian

I have a Debian based server, where every partition is RAIDed, except the one that has /boot/efi. This means that I will still have all my data after a disk failure, but the system may be unable to ...
sfphoton's user avatar
3 votes
1 answer
477 views

A Small GUI Linux System with UEFI completely running on RAMDisk

I am developing a POS System and I am planning to use Linux. My requirements are as follows UEFI Support. (Running on x86 and x86_64) No Storage Drive so completely running on RAM and persistence ...
NJP's user avatar
  • 53
3 votes
2 answers
760 views

Where can the newer Debian/Ubuntu EFI/UEFI firmware certificates be downloaded from?

Both Debian and Ubuntu certificates were added to the dbx EFI/UEFI firmware database because of the BootHole vulnerability, and the two major linux distros are now forced to use different private keys ...
Mikhail Morfikov's user avatar
3 votes
2 answers
1k views

Flashed Bios and can only boot ubuntu 18.04 recovery mode

Back Story I wanted to install minikube, and that wanted virtual box, and that gave errors complaining about AMD-V (hardware virtualization) being unavailable, even after I found that in the bios and ...
Gus's user avatar
  • 81
3 votes
1 answer
6k views

How to fix/reinstall grub from debian media, e.g. rescue mode?

How can one invoke grub-install from the debian netinst image? Or, does one need the live cd. (Situation: two disks: one degraded btrfs raid 1, another a blank disk I can install a new OS on, but ...
ninjagecko's user avatar
3 votes
0 answers
180 views

How do I know if my computer is susceptible to bricking via rm -rf?

I've heard a lot of horror stories of rm -rf / not only deleting the operating system (as expected) but also hard bricking the hardware of the system by deleting important firmware variables, ...
Daffy's user avatar
  • 405
3 votes
0 answers
54 views

How to replace osx with Linux

I tried searching for this answer but the only one I would was from 2012 and surely things have changed since then. Anyway, I inherented an iMac from my Dad when he upgraded to a MacBook Air. I'd ...
Ev-'s user avatar
  • 639
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0 answers
661 views

Cannot use live USB installation media on Dell XPS 13 7390 Developer Edition

I have a new Dell XPS 13 7390 Developer Edition. This is not the 2-in-1 machine; it's the regular laptop which comes with Ubuntu preinstalled. I am trying to install Debian instead of the OEM version ...
chimeracoder's user avatar
3 votes
0 answers
2k views

Debian 10: No Bootable Devices

I am unable to boot into my new Debian 10 installation without using Super Grub Disk. This is a brand new Debian 10 install on a fresh hard drive. I am not dual booting -- the Debian graphical ...
fish's user avatar
  • 31
3 votes
0 answers
298 views

kexec: relocate_kernel fails

I am not able to get kexec to work. For x86_64 relocate_kernel fails to store information for jumping back. Kexec stops in movq %r9, CP_PA_TABLE_PAGE(%r11). works fine for kernel 4.4.162, doesn't ...
Jewgeni T.'s user avatar
3 votes
0 answers
2k views

Deepin Installer won't start - stuck on black screen with single dash

I have just bought an Asus Zenbook UX433FA, on which I want to install Deepin 15.8 as my only OS. I have followed the installation guide on the Deepin website, therefore creating a bootable USB device ...
Pierre Thalamy's user avatar
3 votes
0 answers
400 views

FreeBSD 11.2: how to resize the boot options menu on a UEFI/GPT/ZFS machine?

Is there a way to resize the boot options menu in Freebsd 11.2 on a UEFI/GPT/ZFS machine (zfs-on-root)? On multiple machines, the installation resulted in the boot options menu being rendered in a ...
user avatar
3 votes
0 answers
356 views

How to get Windows on grub menu? Using two HDDs; Windows bootloader on first

Here is some background. I had a 1TB HDD with Windows inside it. Partitions something like this: I bought an another hard drive of 2TB and wanted to dedicate 1TB to Windows and another to Linux. Here ...
Santosh Kumar's user avatar
3 votes
1 answer
2k views

Unable to boot from a bootable USB drive on a machine where Win 10 is installed already to be able to start installing Linux

I'm trying to replace win 10 with Arch. Now only Windows 10 is installed. I've created a bootable usb: # dd bs=4M if=/path/to/archlinux.iso of=/dev/sdb status=progress && sync Then I chose ...
Alan Coromano's user avatar
3 votes
0 answers
327 views

How to escape a BIOS failure?

While attempting to install deepin linux onto my new netbook, I worked myself into a corner that I do not know how to escape. 1) I loaded the deepin installer onto my USB stick as per instructions, ...
B. Huntemann's user avatar
3 votes
0 answers
2k views

building a uefi-secure boot debian-USB

Target: Debian with secure boot on USB Some Links I base my progress on rodsbooks efi-bootloaders installation rodsbooks efi-bootloaders secureboot https://wiki.ubuntu.com/SecurityTeam/SecureBoot ...
groebsgr's user avatar
3 votes
0 answers
8k views

Sign GRUB2 bootloader to enable UEFI secure boot

Following preliminaries: Linux 4.2.3-gentoo GRUB2 UEFI, Secure Boot off Now, I want to mess with the secure boot so I'm able to turn it on. More or less following this guide, I have: backed up the ...
hoefling's user avatar
  • 896
3 votes
1 answer
663 views

Preinstalled windows 8.1 not booting after installing Linux mint 17.1

I have pre-installed windows 8.1 on my machine and its a uefi enabled machine. I installed linux mint 17.1 on this by the side of windows 8.1. As I was unaware about the approach to install linux ...
Sagar Guhe's user avatar
3 votes
0 answers
799 views

Questions Regarding UEFI Shell - Version 2.0 Wanted

I bought a cheap laptop for myself last Christmas, just because I wanted a laptop. A Toshiba Satellite C55-A5310 on special. I'm also a big believer in OEM software for laptops, so I left Windows 8.1 ...
eyoung100's user avatar
  • 6,150
3 votes
0 answers
2k views

Create bootable hfs+ partition for macbook

I've installed Debian testing on a Macbook Pro (mid 2014) without keeping OS X on the internal SSD. I've used the following GPT partition layout: HFS+ EFI on /boot/efi BTRFS on / SWAP on swap I've ...
Peter Verbrugge's user avatar
3 votes
2 answers
117 views

How can you configure a system to be bootable from most modern systems?

How can a Linux system be installed on a portable storage medium so that both BIOS systems (e.g. a ThinkPad) and EFI systems (e.g. a Mac Mini) can boot to it? The reason I ask is because I tried ...
Christian Chapman's user avatar
3 votes
4 answers
6k views

Dual booting Ubuntu and Windows 8. w8 boots through grub shell, but not from menu

I have a laptop, with installations of Ubuntu 12.10, and Windows 8. Windows 8 was first installed on the system, and Ubuntu was installed afterwards. During the Ubuntu installation, the installer ...
julumme's user avatar
  • 143
3 votes
1 answer
1k views

How to configure GRUB to load Windows 7 Install in UEFI mode

I have a Dual-Boot USB I created with Multisystem for booting into PartedMagic, Ubuntu 11.10 & Windows 7 Install. Problem is Windows 7 says it can't install on a GPT partition. Googled, and found ...
Jiew Meng's user avatar
  • 2,433
2 votes
1 answer
252 views

Verifying a signature of an EFI binary

I'm exploring UEFI secure boot and want to verify the certificates of the signed binaries. The code below shows there are indeed some signatures present: sbverify --list $BOOT/EFI/BOOT/BOOTX64.EFI ...
TheMeaningfulEngineer's user avatar
2 votes
0 answers
1k views

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-...
thomas-hiron's user avatar
2 votes
0 answers
2k views

Updated GRUB on Arch linux, tried fix but GRUB gives error: Symbol grub_debug_malloc not found

I posted this same post on r/archlinux but have not gotten much results. I updated Arch Linux (vanilla), but now GRUB boots into firmware. (I am sure a lot of you guys have known this issue, and I did ...
user541458's user avatar
2 votes
0 answers
929 views

dracut warning: /dev/mapper/foobar does not exists

I'm trying to install Void Linux with LUKS encryption on the root partition, currently, my /etc/fstab file looks like this: /dev/sda1 /boot/efi vfat rw,relatime 0 2 /dev/sda2 swap swap rw,noatime,...
henriquehbr's user avatar
2 votes
0 answers
774 views

EgisTec 0570 Fingerprint Sensor - fprintd-enroll not working

I have an Acer Swift 3 (SF314-57) running arch, which has an 0570 LighTuning Technology Inc. EgisTec Touch Fingerprint Sensor. Support for this device was just made available in the latest libfprint ...
mipy's user avatar
  • 21
2 votes
0 answers
1k views

Arch os-prober won't find Windows 10 on different disk

Ok so I have read similar questions but I haven't been able to solve my problem so far. I have just installed an Arch in a SSD (located on /dev/sdc) and I have a Windows 10 on another SSD (/dev/sda). ...
Mikicat's user avatar
  • 123
2 votes
0 answers
597 views

Change Secure Boot Mode EFI Variable without entering the firmware setup GUI?

I am trying to figure out a way to change the secure boot setting from Windows, Linux, or an EFI shell. I assume this is impossible as that would defeat the whole purpose of secure boot, however I ...
Jack1221's user avatar
2 votes
0 answers
1k 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 ...
Jhon Piper's user avatar
2 votes
1 answer
2k views

Booting mfsBSD via PXE with UEFI

I'm trying to boot mfsBSD ISO via PXE on a host with UEFI boot enabled. It was a pretty simple task with BIOS boot, the ipxe config for this task looked like this: kernel --name freebsd http://pxe....
Konstantin Kelemen's user avatar
2 votes
0 answers
908 views

Dual boot CentOS 7 and CentOS 8 on UEFI machine

I want to build a dual boot environment of CentOS 7 and 8 on a UEFI/GPT machine. But, I encountered a EFI bootloader problem; Both CentOS 7 and 8 installers put their bootloaders in the same place: \...
krkwyh's user avatar
  • 21
2 votes
0 answers
2k views

How to show GRUB menu instead of command line?

I try to install Ubuntu 18.04 on a Lenovo Ideapad 320, but the installer always hangs at installing the grub2 package. So I ran the installer with ubiquity -b (no bootloader) and it installs fine. I ...
nc404's user avatar
  • 121
2 votes
0 answers
67 views

Debian 10 install cd not starting installer

I am trying to install Debian 10 on my Acer desktop computer that does not have UEFI or Secure Boot. When I boot my Debian 10 installer CD, it gets to the menu where you choose graphical install, ...
Cody Kish's user avatar
2 votes
0 answers
592 views

Unable to mount Mac's EFI partition from Ubuntu Live USB

I've tried to mount my mac's EFI partiton while using an ubuntu live USB, however I get the following errors: ubuntu@ubuntu:~$ sudo mount /dev/sdb2 /mnt/efi mount: /mnt/efi: /dev/sdb2 already mounted ...
Indiana Jones's user avatar

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