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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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2answers
336 views

EFI can't to boot Linux

I have bought a HP Probook x360 11 G1 EE laptop with an EFI boot and Windows preinstalled. The first problem is that there's no option in the bios to support legacy boot, so I can't do without EFI. ...
0
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1answer
206 views

Accessing UEFI hardware info from Linux

I want to get info about hardware through UEFI. I know, I can get the efi variables and make dump using fwts tool in Linux. Also, I know about "device" command for EFI shell, which will show me all ...
21
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4answers
67k views

How to boot EFI kernel using QEMU (kvm)?

I'm trying to emulate a EFI environment using QEMU (kmv); virtualbox takes 15 minutes to boot in EFI mode using archboot. Using legacy BIOS mode, I can boot using this command: root@citsnmaiko-deb:/...
1
vote
1answer
684 views

Convert a Ubuntu BIOS install to EFI/UEFI in USB stick

I have a linux installation (full installation not live) in a USB stick. When I set it up it uses BIOS to boot but now I need to change it to UEFI because some newer machines only boot in UEFI. I ...
0
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2answers
1k views

GRUB disappeared from Boot Menu after UEFI (BIOS) upgrade on Thinkpad X1 Carbon gen5

I have dual boot system with Windows 10 and Arch linux (with grub) installed on Thinkpad X1 Carbon gen5. I've updated BIOS from version 1.22 to 1.34. Before Update I had several options in Boot Menu ...
0
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1answer
526 views

How to install Ubuntu on ASUS F556U, JournalError error? [closed]

I'm trying to install Ubuntu 18.04 on my ASUS F556U laptop without success. I already asked other questions on the subject, thinking that the problems were by UEFI mode. Well surpassed that, I already ...
0
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1answer
18 views

Two separate disks, no grub displayed but boots straight to Windows

I have a laptop that contains two SSD disks. Legacy mode is completely disabled in BIOS, so I'm most likely using UEFI only. The bigger disk was used to install a fresh copy of Windows. I then used ...
3
votes
2answers
21k views

GRUB menu doesn't appear after Ubuntu install alongside with Windows 10

I shrunk Windows partition, freed 100 Gb, installed Ubuntu into it, installed GRUB into into MBS of the first drive and after reboot I got Windows and with no any option to select. Even in BIOS in ...
0
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2answers
2k views

Debian UEFI Boot with DELL Latitude 7490 “No bootable devices found”

I have tried to install Debian 9.5 on a DELL Latitude 7490 with UEFI, but when I try to boot the machine I get the infamous "No bootable devices found". EFI partition has been created, and I can see ...
-1
votes
2answers
2k views

new kali installation (EFI), I can't start on kali OS without the “super grub 2” usb key

I got a new computer. This computer works before with a multi boot (ubuntu OS, kali OS and windows OS). I wanted to erase all datas for install only a Kali linux OS (no multi boot, just only Kali). ...
2
votes
1answer
4k views

Can't load zfs kernel module on Fedora with Secure Boot - “Required key not available”

I'd like to use zfs with my Fedora 20 system. I've installed the ZFS on Linux Fedora repository and subsequently the kernel-devel and zfs package. As far as I can tell, everything was installed ...
0
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2answers
329 views

UEFI cannot boot Debian install on external USB without nvram entry

I have installed Debian Stretch onto an external USB drive that I plan to use as a portable installation that I can use on multiple computers, so I need to be able to boot it from the USB directly ...
1
vote
3answers
3k views

grub2 gone every time I boot Windows 10

I installed Windows 7 on an SSD and upgraded it to Windows 10. Then I installed Linux mint 17.2 Cinnamon and had the following partitions: The boot menu was showing Linux Mint and Windows 10 and I ...
0
votes
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 ...
0
votes
1answer
246 views

Change UEFI boot order from busybox

After generate a new efi boot entry with efibootmgr: # efibootmgr -c -g -L "Debian (EFI stub)" -l '\EFI\debian\vmlinuz' -u "root=UUID=955548bd-9c77-4893-8633-3a5e7966dfc9 ro quiet rootfstype=ext4 ...
0
votes
1answer
131 views

Two drives with their own ESP

I'm having a problem about how I boot to Linux. I tried and successfully boot if there is only one drive and one ESP. but my goal is to have two different drives with their own ESP. the first drive ...
1
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0answers
309 views

GRUB Change EFI to BIOS legacy boot mode

I need to change the boot mode of an UNIX system from EFI to BIOS. This system (Fedora Atomic Host) uses GRUB as a default bootloader. I need to change the bootloader to BIOS, because I want to ...
1
vote
1answer
2k views

EFI system partition on top of MD RAID and LVM

I'd like to put a EFI system partition on top of a MD RAID 1 + LVM setup. So the ESP would be a Logical Volume on top of the MD RAID device. I've heard mixed things about whether this is possible. Has ...
1
vote
1answer
228 views

Shim only works in non-Secure Boot mode

I'm trying to get my dual boot (Arch+Win10) to work with Secure Boot. I followed the Arch Wiki, with the following steps. sudo mount /dev/sda1 /boot/efi sudo mv /boot/efi/EFI/Boot/bootx64.efi /boot/...
1
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0answers
1k views

Solus OS broken boot

I had a perfectly fine and running Solus OS installation on a 100gb of 1tb hard drive. When I created a partition on the remaining 900gb, boot just vanished. I tried all the things from the internet, ...
2
votes
1answer
257 views

FreeBSD, update UEFI boot after motherboard change

I had a FreeBSD 10 installation that booted under UEFI. It's on an AsRock C2750D4I motherboard. Recently I've had the motherboard replaced under warranty and now I can't boot the server automatically. ...
-1
votes
1answer
2k views

Manjaro: SSD not recognized in BIOS after installation

I've installed Manjaro 17.11.1 on my ASUS UX31A. Before there was ElementaryOS running on it without a problem. When I startup the system after installation the laptop enters BIOS directly. There's ...
0
votes
1answer
658 views

Dual boot Windows and Linux on separate HDDs - error: no such device

I followed online tutorials to install Windows 10 alongside Linux (Arch) on separate HDDs. This involved physically disconnecting each HDD while installing the OS on the other. The only thread I ...
0
votes
2answers
236 views

Can I trust initramfs and vmlinuz images?

I am running an Arch Linux installation on my laptop with the following partition scheme: /dev/sda1 is my /boot partition, which is also my ESP /dev/sda2 is my LUKS encrypted root partition I use ...
18
votes
5answers
76k views

“EFI variables are not supported on this system”

I am attempting to install Arch linux to a new (and very crappy) HP Pavillion 15 Notebook. This is a UEFI-based machine. After several swings at it, I have managed to get pretty far. Legacy mode is ...
0
votes
1answer
115 views

Bootable NixOS ISOs not working (18.03.132847)

After following the NixOS' Installation Guide, I'm failing to create a bootable Installation ISO. I created an issue for this on NixOS/nixpkgs. But I wanted to see if there was any knowledge here. ...
5
votes
1answer
1k views

Does using UEFI increase battery life?

I've heard about a better power management when using UEFI instead of BIOS. Is that true? It was about energy consumption being more efficient or something like that. If it is true, has the ...
2
votes
1answer
2k views

systemd-boot skips boot menu and ignores settings in /loader/loader.conf

Recently, after I've done something to my multiboot system, when I boot NixOS with systemd-boot, boot menu does not show up anymore even though the timeout is still set to 2 seconds in /loader/loader....
1
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0answers
619 views

How can I get Linux fully installed and operational on 32 bit U/EFI & 64 bit Atom (baytrail) tablet?

How can I get Linux fully installed and operational on a 2 in 1 Trio Windows 10.1 OD Tablet? ( http://www.triotablets.us/tablets/windows-tablets/pro-book-10-1/ ) It utilizes a 32 bit U/EFI and a ...
4
votes
3answers
10k views

(UEFI) Chainloading GRUB from GRUB

Terminology: ESP = my FAT32 EFI partition. I want to: Have a self-contained GRUB install on my ESP that chainloads another GRUB bootloader on my distro root filesystem (/). I currently have several ...
1
vote
0answers
947 views

Linux Mint 19 Tara - can only install without EFI [duplicate]

For the past week I've been trying to create a dual boot with Windows 10 and Linux Mint 19 Tara. The base setup, as intended is supposed to be a simple 1 operating system per SSD: /dev/sda (250GB ...
3
votes
1answer
2k views

How does GRUB 2 work under multiple Linux partitions with UEFI

When we install a new Linux, the installer will install a bootloader (efi file) at EFI partition and update the menu entry at NVRAM, and most likely set the newly added bootloader as default. The ...
2
votes
0answers
233 views

Arch Linux (k4.17) boot failure on Baytrail

I recently installed Arch Linux on one of the cheap windows tablet. I chose arch linux, because it had latest kernel, and in kernel 4.12 the rtl8723bs wifi driver was mainlined. I was surprised how ...
1
vote
1answer
297 views

Problem with instaling GRUB/LILO in dual boot with windows 10 UEFI/GPT

I am having some issues when trying to install Debian 9 alongside Windows 10. Everything goes smoothly until the GRUB installation comes up. After I pick the partition it starts to install and after ...
3
votes
2answers
2k views

grub2 using wrong /boot partition

I recently installed Ubuntu 18.04 from a USB. I did everything the same way I'd done when upgrading from 14 to 16, and 16 to 17, and it worked every time until now. I selected "erase ubuntu 17 and ...
1
vote
1answer
631 views

How to boot UEFI image from PXE?

I would like to load Memtest86 image file from PXE. Unfortunately, their ISO file on site contains old version of Memtest, which load automatically with this config: DEFAULT menu.c32 PROMPT 0 #MENU ...
1
vote
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 ...
1
vote
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 ...
2
votes
2answers
45 views

No bootable device error after restoring debian image to annother ssd disk

I created an image of debian 7 on an SSD disk and later restored it on another computer with excatly same type of HW. however I'm getting the error message: No bootable device -- insert boot disk and ...
0
votes
1answer
197 views

UEFI Ubuntu Install (Dell XPS P31F)

Ubuntu doesn't boot on my machine, I wiped Windows off alltogether, just want Ubuntu only running on it. The laptop has also a 32Gb SSD drive for quick booting Windows, which I don't mind not using ...
0
votes
1answer
24 views

RHEL 6 Partition Size

I want to install RHEL 6 in my PC and would like to know the best partition size for different file systems. Config: Hard Disk - 1TB RAM - 16GB Processor - i7 8700 [UEFI] Motherboard - ...
0
votes
1answer
443 views

Dual boot Windows 10 and Kali linux

I installed kali linux next to windows 10. After the installation of linux, the system worked normally but when I started rebooting the computer GRUB disappeared, and only windows 10 turned on. Then I ...
0
votes
1answer
573 views

Need to cleanup Efivars, but how?

I have rebooted my Acer Aspire CloudBook with multiple versions of Linux, Windows 10 and Chrome OS. Keep going back and forth because all have problems. Now I can only boot Linux Mint, nothing from ...
0
votes
1answer
708 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 ...
1
vote
0answers
508 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 ...
-1
votes
1answer
87 views

Intel UEFI firmware hiding operating systems depending on boot order

I have installed Qubes OS R4.0 onto my Intel NUC which came with Windows 10. After I did so, it booted straight into Qubes and the Windows option disappeared from the firmware's boot menu (accessible ...
0
votes
0answers
28 views

On a laptop with tree linux. After installing Ubuntu my Elementary does not boot

I have a Dell Inspiron 13 7000 laptop with tree linux partitions. On the first one I installed Elementay OS Loki, and it was working perfectly and with all the programs I need so I was very happy with ...
1
vote
0answers
79 views

Dual boot - Installed second OS - can't see the original

I am trying to dual boot Ubuntu/Arch linux. I originally had just Ubuntu on my PC. I then made another partition to install Arch on and followed the Arch wiki and also this resource. After following ...
4
votes
5answers
4k views

Can't boot live USB of Linux Mint DE on my UEFI PC

I used the Universal USB Installer application to copy the latest ISO image from Linux Mint DE (64 bits) and install it on my PC, however when I try to reboot it I have the option to choose my ...
1
vote
1answer
209 views

adding grub to secure boot signature bricked my pc

I have a bought a new pc with a ryzen 7 1700 from MEDION. The PC works well under Windows and Linux with Secure Boot disabled. But the problem came when I wanted to enable grub with secure boot. As I ...