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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0
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1answer
25 views

Debian 8 UEFI support

I am trying to install Debian Jessie on my new laptop. I downloaded the amd64 Live CD, but the UEFI doesn't recognize my Debian DVD ROM. I disabled the secure UEFI option, but it didn't work, UEFI ...
0
votes
0answers
35 views

deleted linux Mint from Win 8.1 dual-boot and cannot reinstall linux now

Until yesterday I had a dual-boot of Windows 8.1 with linux Mint 17.2 Rafaella Cinnamon 64bit. Via the terminal I deleted something that I shouldn't and then when I rebooted the PC, linux stuck at ...
0
votes
0answers
27 views

Installing Debian: Force UEFI, what does it affect?

I've got a laptop here that came with a Windows 8 installation. What I did: Removed the harddisk, put in an SSD and now I've tried to, unsuccesfully, install Debian. I've used all the default options ...
0
votes
1answer
22 views

Reinstall corrupted vmlinuz-linux

I'm dual booting Arch Linux and Windows 8.1. I forgot to disable "Fast Startup" on Windows, and it corrupted vmlinuz-linux in the /boot partition. When I try to boot into Arch from Gummiboot, I ...
0
votes
2answers
42 views

Arch Linux installation usb

I burned the newest ISO to a flash drive using unetbootin, but it only comes up with this: Arch Linux archiso x86_64 UEFI USB UEFI Shell x86_64 v1 UEFI Shell x86_64 v2 EFI Default Loader When I try ...
0
votes
1answer
36 views

Remove Windows Boot manager?

I have two drives an SSD boot drive and a storage drive. I needed a temporary install of windows so I put it on my storage drive while leaving Linux on my boot drive. When I installed it windows ...
0
votes
1answer
23 views

How to make a UEFI bootable ISO image with grub-mkrescue?

The story so far: I have been following this guide to produce a customized version of Ubuntu. As of now, the structure of the CD is complete. I have generated an ISO with the command: sudo ...
1
vote
0answers
38 views

QEMU doesn't boot iso file in UEFI

The Problem I would like to run a Windows 8.1 iso inside QEMU KVM. For this I have downloaded the necessary OVMF files (from here). I could successfully booted a Windows 10 in UEFI mode, but with the ...
1
vote
1answer
69 views

Recovery EFI boot formatted partition

My notebook had windows 10 and ubuntu 15.04 in dual boot in uefi mode. Then I tried to replace ubuntu by fedora 22. Ubuntu boot loader was installed in /boot/efi, but I formatted that partition when I ...
0
votes
0answers
37 views

UEFI with Windows and Ubuntu dual boot Grub fail

UEFI with Windows and Ubuntu dual boot Grub fail when boot and show a minimal bash but UEFI detect Ubuntu only Grub can not load system.
1
vote
1answer
130 views

Can I add Windows to my systemd-boot bootloader if I have separate EFI partitions?

I've just installed Arch Linux on to a new set of partitions on my Windows 8 machine. In doing so, I created a new 512MB EFI partition for Linux to load from, leaving the existing Windows EFI ...
1
vote
0answers
55 views

lost FreeBSD efi loader after upgrading windows 10

How to return option to load FreeBSD, after it was lost next to upgrading windows 10. I use uefi-FreeBSD10, and didn't created another one ESP.
0
votes
0answers
81 views

grub2: error: /vmlinuz-3.16-ucs109-amd64.efi.signed has invalid signature

I am using a derivative of Debian, called Univention Corporate Server. It's a nice appliance that I use for my home server. Yesterday I upgraded to the newest version and since then my server does not ...
1
vote
2answers
75 views

Boot iso file through uEFI by calling EFI executable inside the iso

I want to create a USB stick that I can use to boot multiple iso files. I want to do this through uEFI. The usb stick would look something like this: /EFI /bootx64.efi /something.conf /isos ...
0
votes
0answers
73 views

Images (e.g. with Clonezilla) of Windows and Linux on a UEFI computer

I use Clonezilla with success for many years to make images from partitions that host Windows 7 or smaller and Ubuntu and other operating systems. Making images and restore them was easy for me. But ...
0
votes
1answer
44 views

Not able to install mint with UEFI

In order to install Linux mint mate edition on a HP pavilion notebook, I downloaded the iso file on the official website. I created a bootable USB stick with Rufus. I shrinked the windows partition ...
0
votes
0answers
59 views

Dual Booting - MAC OSX

I'm new to the whole Linux OS and want to use a distro called "Parrot Security" Problem is, I have a Mac Laptop to which I want to dual boot from. I've installed reFINd and tried to boot from a ...
0
votes
0answers
139 views

UEFI - Installing Ubuntu on MeegoPad

I am trying to install Ubuntu 14 on a MeegoPad device. MeegoPad has Windows 8.1 pre-installed. Through the BIOS, I can change the boot priority between Windows 8.1 and UEFI. Setting UEFI as primary ...
0
votes
1answer
44 views

Problem booting Ubuntu (or any OS), even after doing clean installs

Summary: OS (Ubuntu / Windows) installs fine, but when the time comes to restart and boot, it doesn't boot. (Gets stuck; screen blinks and I am still at boot selector). Can boot to a live ...
0
votes
0answers
29 views

UEFI, multiple OSes and fallback bootloader

As it turns out after reading this document https://wiki.debian.org/GrubEFIReinstall and especially problem 1, there are weak EFI implementations, which only recognize the fallback bootloader. Which ...
1
vote
2answers
52 views

Making persistent USB with minimal OS on os x

I am looking to turn a 8g usb into a bootable drive with a minimal OS. All i want is an OS that will allow me to use vim, nothing else (no internet/any other services). I basically want to turn a usb ...
1
vote
0answers
567 views

Debian 8 installation on UEFI / GPT system

I'm completely lost and need some advice to further explore the problem. Steps that I made: 1) Partitioned my hard drive using gparted. First partition is formatted to FAT32, has flags "boot", "esp" ...
0
votes
1answer
70 views

Debian & Windows 8 UEFI dual booting on separate disks

I want to dual boot Debian and Windows 8, installed on separate disks. This is what I've done so far, following this tutorial. My drive config & partitioning is as follows: /dev/sda1 - Windows ...
0
votes
1answer
138 views

EFI dual-boot problem on HP Pavilion 15 with Windows 8 and Debian 8

Context HP Pavilion 15 Notebook, when I bought it there was Windows 8 pre-installed. Yesterday I partitioned my hard disk and I installed a fresh new Debian 8 everything fine, here's the table: ...
3
votes
1answer
121 views

Can't format HDDs and install linux to Dell hybrid ultrabook

I've tried installing OpenSUSE 13.2, Debian 8/8.1 and Ubuntu 15.04 (all them amd64). Debian/Ubuntu won't show disks and OpenSUSE can't format the partitions created on them. During the install, ...
3
votes
0answers
72 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 ...
1
vote
0answers
193 views

Startup problem: invalid partition table or use UEFI BOOT

I'm working on a Dell Latitude E5430. Recently I booted pcbsd from USB using this file: PCBSD10.1.1-RELEASE-01-31-2015-x64-DVD-USB_0.iso But I guess I did something wrong. I was trying to install ...
0
votes
0answers
197 views

I installed Debian 8 on a UEFI laptop, but it isn`t booting

Last time I used linux was a long time ago, Debian six had just been released, and those days I would install it with tranquility in any system. I thought it would be the same now, as I`m on windows ...
1
vote
2answers
107 views

UEFI System. Are EFI settings kept on the HDD. What happens if I change HDD?

I have an UEFI system with Linux installed on it. Unfortunately I need to upgrade the BIOS firmware and after a month of failing with live CDs and Live DOSes and so on I have decided to buy a new hard ...
2
votes
1answer
376 views

How do I repair grub2 (not) booting 32-bit EFI on a 64-bit machine?

I have an Asus EeeBook X205TA which proves very difficult to install Linux on due to obscure new hardware and 32-bit EFI on 64-bit hardware. I have seen and read a lot of material and I am almost ...
2
votes
0answers
265 views

How to clean up bootloaders & UEFI entries from other installs?

I got a new Windows laptop, and I wanted to dual boot with Linux. I installed Fedora, before changing my mind and going back to Mint. I'd like to keep Win 8.1 and Mint. However, now my UEFI boot menu ...
1
vote
1answer
248 views

Unable to delete boot entries using efibootmgr

This used to work in the past but since recently deleting entries with efibootmgr fails with return value 15. Changing the boot order fails as well. However, creating new entries does succeed, ...
1
vote
1answer
2k views

Debian 8 Jessie EFI dualboot Windows 8.1

I'm quite new with EFI as I recently got EFI-enabled laptop. 500GB SSHD -> GPT - 80GB Window 8.1 - 80GB Empty - All rest data storage Now I would like to install Debian 8 Jessie to ...
4
votes
2answers
379 views

Can't boot, task btrfs-transacti blocked for more than 120 seconds, how to fix this?

My computer was set up to boot Ubuntu 15.04 via UEFI. I have two disks. My first disk /dev/sda is a 128 GB ssd formatted as GPT, containing an EFI partition and a btrfs partiton with subvolume @ ...
0
votes
0answers
61 views

How to dual-boot windows 7 and Debian with UEFI and 2HDDs?

I'd like to install Debian near my windows 7 x64 installation, as I know to set up Linux on the second HDD (Windows 7 is installed on the first one) I need to manually configure the partitioning, ...
0
votes
0answers
74 views

Windows and Linux with UEFI

I previously had a computer with both Windows and Linux, totally separated since I always unplug the hard drive with the operating system not being used. When I upgraded to a mother board with UEFI, ...
0
votes
1answer
240 views

Creating a NON-UEFI fedora 21 usb stick (or, DVD)

Long story short, I need a dualboot win7/FC21 laptop. Fedora 21 would replace the existing Ubuntu install (so I am pretty sure this is already a non uefi box). BIOS does not mention UEFI anywhere I ...
0
votes
0answers
87 views

How to restore EFI partition for Fedora 21

I wiped the EFI partition. How do I restore it without completely reinstalling Fedora?
0
votes
1answer
1k views

Debian 8 Jessie UEFI Installation

I am installing Debian 8 Jessie on a UEFI system. I have to set up RAID so I am using manual partitioning. The system installs fine in BIOS compatibility mode but there doesnt seem to be a UEFI ...
0
votes
0answers
88 views

Install of manjaro linux on Raid 0

Im trying to install gnome manjaro on my raid 0 ssd's along side my uefi windows 8. The GUI installer proceeds without problems but when I try to boot the system gets stuck on the manjaro load screen. ...
2
votes
0answers
321 views

Fedora installation breaks UEFI boot

I am having problems installing Fedora 21/22-alpha on brand new system and I am new to the EFI thing so I am running into issues. I installed Win7, booted in UEFI, installed in UEFI, at least I see an ...
0
votes
1answer
186 views

Centos 6.4 and UEFI

I have centos 6.4 64. In /boot/efi/EFI/redhat I have grub.efi file (about 251Kb). However, when I execute efibootmgr I get Fatal: Couldn't open either sysfs or procfs directories for accessing ...
0
votes
1answer
254 views

What's the difference between `grubx64.efi`and `gcdx64.efi`

CentOS7 package grub2-efi provides two files that are very similar. -rwxr-xr-x 1 root root 1070976 Mar 26 09:27 ./boot/efi/EFI/centos/gcdx64.efi -rwxr-xr-x 1 root root 1070976 Mar 26 09:27 ...
3
votes
2answers
694 views

What is the purpose of UEFI partition?

On old computers (using BIOS) we had to create 2 partitions, one to mount / and second for swap. But on new systems with UEFI we need to create third partition EFI System in addition to those two ...
1
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0answers
82 views

Convert BIOS booting to UEFI in existed linux installation

I have debian installed on HDD with GPT partition table. But it installed with BIOS compatible mode. Now I want to boot it from native UEFI. How can I do this? Ofcource I have motherboard with UEFI.
0
votes
0answers
201 views

can't boot kali install cd from efi

So a while back Kali announced that their version was UEFI compatible. That's a relief because before I knew about it I had to physically go into my BIOS to change my boot mode (From UEFI to CSM) ...
0
votes
0answers
32 views

How to I diagnose and repair “not booting” in an existing installation?

I installed Mint 17.1 on a fresh SSD, along with Clonzilla in another partition, and rEFInd in the EFI System partition (more details vide infra). It worked on the bench, but now put together in the ...
1
vote
1answer
931 views

elementary OS Freya won't boot

I have been doing Linux since last June and I have found my way around it pretty well. But I have been trying to boot elementary OS Freya beta 2 to my windows 8 UEFI laptop, I have tried using ...
0
votes
0answers
226 views

Manjaro boots to grub screen after install

I've installed Manjaro and when I boot into my installation I get greeted by the grub command line. When using the CLI installer (testing, to use LVM support) everything went fine until I tried to ...
1
vote
0answers
139 views

How to stop grub from messing with my EFI partition?

I'm dual booting Windows 8.1 and Linux Mint. I decided to install the Linux Mint OS (Rebecca) onto an EXTERNAL HDD. So what I did was click "Something Else" during installation and I created 3 ...