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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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0answers
61 views

How do i speed up boot time?

How can i minimize boot time ? I am using Debian 10 with a i7-4600U with 12GB of RAM and a 120GB SSD, UEFI is enabled. and here's the output of systemd-analyze plot > plot.svg I know 5 seconds ...
0
votes
1answer
47 views

FreeBSD : strange screen when booting from grub [on hold]

I am able to boot my FreeBSD partition using Grub thank to: menuentry "FreeBSD" --class freebsd --class bsd --class os { insmod ufs2 insmod bsd set root=(hd1,5) kfreebsd /boot/kernel/kernel ...
1
vote
2answers
44 views

UEFI-installed Debian on a pendrive doesn't want to boot after being removed once

I read here, once, that installing a Debian 9 on a pendrive (well, in my case it's a SDCard adapter) directly would work, and it did. The problem came up, though, after i unplugged the adapter from ...
0
votes
0answers
27 views

Fedora UEFI Dual boot breaks NVIDIA in Windows

I'm having a problem regarding nvidia drivers and a dual boot system on uefi. I installed fedora on UEFI mode, so grub boots on an EFI partition(/dev/sda3) which then allows to boot Windows Boot ...
0
votes
0answers
39 views

Can I move any partition freely when using UEFI?

In BIOS, booting is two or three stages, both of which will end up calling the final-stage bootloader code in the boot block of a partition. Is that the reason why I need to reinstall GRUB2 when ...
0
votes
0answers
12 views

Cannot manage to restore Dual Boot after reinstalling ubuntu

I have a Dell Latitude 3590 with Windows 10 installed as factory setting. I previously installed ubuntu 18.04.2-desktop with an iso image on a usb drive with dual boot allowing me to choose between ...
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votes
0answers
27 views

What is the relation between UEFI firmware and the EFI system partition?

Since UEFI replaces BIOS, is it also stored in ROM (instead of a disk) as BIOS? Is it correct that EFI_system_partition in a disk? Is UEFI firmware stored in the EFI system partition? If not, what is ...
0
votes
1answer
110 views

Is UEFI a bootloader as well as a replacement of BIOS?

Does this laptop with Lubuntu 18.04 have a bootloader installed and use it? If not, what does it use instead? What is its booting process like? Does the laptop use UEFI instead of BIOS? Is UEFI a ...
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0answers
17 views

USB-installer won't run on Acer Aspire E1-572?

Does anyone know what kind of settings I need in bios/uefi to install Linux Mint, from usb-stick, to Acer aspire E1-572?
0
votes
1answer
51 views

Installation and booting scenarios for combinations of boot sector (GPT or MBR), firmware (BIOS or UEFI)?

I think all the confusions in this post come from coexistence of old and new technologies and abuse of terminology such as mentioned in https://en.wikipedia.org/wiki/...
1
vote
3answers
32 views

How install legacy grub to gpt uefi disk?

I have new computer with UEFI. I formated the disc as GPT (not MBR), made few small partions on start (as placeholders for UEFI, for boot, for swap etc ...) then larger partition for system / (and ...
-1
votes
1answer
60 views

Am I able to install Arch Linux with the 100MB EFI partition that Windows 10 had already created on installation?

I want to dual-boot Arch Linux alongside Windows 10, which is already installed. I am using UEFI-GPT. On Windows 10 installation, it creates an EFI system partition as required by UEFI. This ...
1
vote
0answers
62 views

Creating an ISO that a macbook can boot from

Trying to repack an ISO with a preseed file to automate installation. I have done this with a dozen laptops and works great. Until I ran into a macbook, where it does not work. Originally repacking ...
2
votes
0answers
32 views

how is the boot directory of the EFI/ESP partition related to the boot directory of the root partition?

are the files inside these 2 directories mirror images of each other? how are they related? for example the below command that i execute: sudo cp -a initramfs-4.18.16-300.fc29.x86_64.img /boot/EFI/...
3
votes
0answers
138 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 ...
0
votes
1answer
88 views

Clonezilla clone linux partition MBR based and restore to UEFI based system

I have a xubuntu partition on my actual laptop with MBR and grub for dual boot windows and Linux. I'm trying to clone the xubuntu partition and restore into a new laptop that is UEFI based. In the ...
1
vote
0answers
33 views

Is it necessary to encyrpt the EFI parition [closed]

I am used to building systems with LUKS on LVM and encrypting the boot parition containing GRUB2. Since moving to newer machines I am using UEFI. Is it necessary to encrypt the EFI partition in the ...
4
votes
0answers
30 views

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 ...
-1
votes
1answer
187 views

Debian 9 and UEFI

I have installed Debian Stretch (9.6) on UEFI-based platform Everything went fine, but I cannot... boot to the system. After the GRUB2 starts the image all I get is: Loading Linux 4.9.0-8-amd64 ...
1
vote
1answer
106 views

GRUB does not load in Windows10+Linux with UEFI

I have a new computer that comes with UEFI but I'm unable to use Windows 10 and Linux in dual boot, after installation of Linux+GRUB and reboot it loads Windows without showing GRUB, notice that first ...
1
vote
0answers
302 views

Can't boot on Win10 with dual-boot Fedora 29 + Win10 (both encrypted partitions)

Did install Fedora 29 on a different partition than Win10, usual dual boot configuration that I already used a good number of times. The new parameter is that I use encryption on Windows system (...
1
vote
1answer
41 views

Multiple Linux Installation - managing shared ESP and Bootable options

I have installed Manjaro alongside BlackArch. BlackArch has its bootloader in /boot which is a separate partition. Manjaro has three partitions, one for root(/), one for /boot, and one for /boot/efi. ...
3
votes
1answer
64 views

Dual boot ignores EFI devices

My pc does not boot anymore in EFI/UEFI mode. I had grub installed and was able to boot on both Windows 10 and Ubuntu Linux (14.04 LTS). I recently tried to install Fedora Workstation 29 '...
0
votes
0answers
164 views

boot/grub/efi.img invalid image size

I am attempting to create a custom Ubuntu 16.04 LTS Server installation media and have been following the instruction here https://help.ubuntu.com/community/InstallCDCustomization When I attempt to ...
0
votes
1answer
111 views

grub2 no such device (Win10 / Fedora)

I have Win10 installed on a nvme drive. I have installed Fedora 29 on another ssd with LVM. When grub boots, it shows Fedora & Windows 10 on the list, as it should. But starting with Windows ...
2
votes
0answers
263 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 ...
3
votes
1answer
47 views

Clone Debian installation

I want to clone an existing Debian installation and restore on a new machine with a hard drive of different size. The partioning is very easy - /dev/sda1 for EFI, /dev/sda2 for Linux and /dev/sda3 ...
0
votes
2answers
455 views

No boot option after Linux Mint installation (dual boot)

I recently installed Linux Mint 19 onto my Dell XPS 15 laptop with Windows 10 pre-installed. The initial install of Mint seemed to go fine. I booted off of a live USB and installed Mint onto a ...
-1
votes
1answer
64 views

How can I mount a partition before the OS has booted?

In the instructions for configuring an EFI system partition in Arch Linux, it reads as follows: mount ESP to /boot. This is the preferred method when directly booting a EFISTUB kernel from UEFI. ...
3
votes
0answers
80 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 ...
0
votes
0answers
38 views

UEFI Stub booting not working

I am trying to boot Arch Linux via an EFI Stub. I created an EFI partition (formatted as FAT32), a swap partition and a main partition on which I installed the Arch Linux core package group. I then ...
0
votes
1answer
24 views

Swapping hard drives results in being unable to boot

I have a laptop that I installed Arch on, so far so good. After getting things set up just the way I wanted them and using it for a few days, I decided to experiment a little and install SteamOS. ...
0
votes
1answer
379 views

What is causing my EFI partition to become corrupt when booting CentOS after installation?

I am attempting to install the latest CentOS 7.5 x64 on small form factor PC ASUS Eee Box EB1037. It is an Intel Celeron J1900 (Bay Trail) with an onboard NVIDIA GeForce GT 820M. The installtion media ...
0
votes
2answers
496 views

Can't install Fedora 29 on Thinkpad W550s due to GPT

I have a Lenovo Thinkpad W550s that already has Windows 7 on it. I would like to install Fedora 29 Workstation alongside Windows 7, but I have run into some problems. The hard drive was formatted ...
5
votes
3answers
1k views

GPU passthrough works with UEFI firmware but not Windows iso

I am trying to set up a virtual machine with passthrough graphics. I am able to get the passthrough working for the UEFI shell, but not the official Windows installer. I can get the Windows installer ...
0
votes
1answer
92 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 ...
0
votes
1answer
17 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 ...
0
votes
2answers
534 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
votes
1answer
196 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
votes
2answers
939 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 ...
2
votes
1answer
3k views

Timed out waiting for device dev-disk-by\x2duuid-C829\x2dC4C1.device

I had formatted efi partition and installed windows again. I have dual boot Windows and Linux, then I installed the grub bootloader again from a live usb using these commands: mount /dev/sda* /mnt ...
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votes
2answers
625 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). ...
0
votes
2answers
194 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 ...
0
votes
1answer
82 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 ...
1
vote
0answers
165 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
0answers
572 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, ...
1
vote
1answer
121 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
votes
1answer
578 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
0answers
18 views

How to get Linux install on USB to show in Mac Startup Manager?

I started off by installing the full version Kali Linux on a USB drive. I went through the graphical installer and repartitioned the USB with /home and swap partitions so this isn't a Live USB, just ...
0
votes
1answer
423 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 ...