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.

learn more… | top users | synonyms

0
votes
1answer
13 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 ...
4
votes
1answer
1k views

UEFI and Puppy Linux

I recently installed Puppy Linux on a USB stick using the Universal USB Installer, but I have not being able to boot from it. My notebook came with Windows 8 and had the secure boot activated at UEFI. ...
3
votes
3answers
3k 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 ...
0
votes
1answer
65 views

Fan error during boot but it boots well

I installed the second linux distro along with Ubuntu, something went wrong, it was to choosing a wrong nvidia driver, and I decided to remove that distro completely by deleting the partition and ...
0
votes
1answer
949 views

How do I restore grub on a uefi boot after a windows update wiped it?

Until yesterday I had a dual boot debian / win8 with grub that worked like a charm. Yesterday a stupid windows update totally wiped grub and I'm now unable to boot in linux. I installed linux a year ...
0
votes
0answers
12 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
0answers
59 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" ...
1
vote
2answers
26 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 ...
0
votes
1answer
34 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 ...
15
votes
7answers
32k views

Why is USB not working in Linux when it works in UEFI/BIOS?

For background I have just built a new machine with modern hardware including: AMD FX-8350 Gigabyte GA-990FXA-UD3 motherboard 16GB RAM NVidia GTX 650 Ti Kingston SSD Given that, I tried to install ...
0
votes
1answer
2k views

Arch Linux Live USB no longer booting UEFI

My Lenovo laptop is running Arch Linux with a UEFI GPT partition table. One day I powered up my laptop, but couldn't get passed the Lenovo boot screen. I used a USB stick to boot up and reinstall ...
0
votes
1answer
41 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: ...
2
votes
1answer
2k views

Creating EFI bootable GPT partition with gdisk on previous MBR, GPT Damaged

So this is a sister question to my previous one about partitioning for a UEFI boot loader. Parititioning for a UEFI boot loader, can LVM be used? Disclaimer: I don't give a flip about the data on ...
3
votes
1answer
50 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
41 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 ...
0
votes
0answers
3k views

Kali Linux is not booting after installation after/before Windows 7

I have GPT, EFI (or UEFI?). I've installed Windows 7, then Kali Linux (in opposite order too), but Kali doesn't want to boot -- Windows wants. I tried to use update-grub, tried to switch the ...
5
votes
1answer
649 views

How to write/edit/update the OsIndications efi variable from command line?

In the need to enter the UEFI firmware setup utility while using ultra fast boot (keyboard drivers are not loaded during POST), I wish to write to the "Os Indications" efi variable. My OS is Ubuntu ...
1
vote
0answers
48 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 ...
3
votes
1answer
597 views

Builiding a UEFI bootable USB

I'm having a really hard time getting Mint13 installed on my new laptop, no optical UEFI support and having odd corruption of grub.cfg when I do try and use unetbootin. Is there a method to build a ...
0
votes
0answers
62 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 ...
0
votes
1answer
899 views

Problem installing Debian 7 64bit on UEFI laptop Fujitsu Lifebook NH532

I have installed Debian 7 64bit on my brand new laptop Fujitsu Lifebook NH532. As I understood lately this is UEFI-enabled laptop. At first installation attempt I've not created EFI boot partition, ...
1
vote
3answers
15k views

GRUB-EFI installation fails while installing Kali Linux in external hard disk

I was trying to install Kali Linux from a live USB to an 1TB external hard disk. At first I was unable to boot the live USB with my H2O Insyde BIOS. Then I converted my pen drive partition table to ...
0
votes
1answer
826 views

Can't get grub to boot windows 7 partition. “error: invalid EFI file path”

I have an "HP pavilion 7008tx dv7" laptop. It came bundled with Windows 7 and has two 1TB HHD and an 32G SSD. Here is the output form "sudo parted -l": Model: ATA TOSHIBA MQ01ABD1 (scsi) Disk ...
1
vote
2answers
58 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
0answers
96 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
1answer
1k views

efivars data missing from procfs and sysfs

I'm trying to install ubuntu on a Tab-X 10.1 Intel WinPad. The UEFI loader only allows booting from 32 bit efi images. Ubuntu only supports UEFI in 64 bit versions. I'm trying to get the 64 bit ...
2
votes
0answers
95 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 ...
7
votes
1answer
5k views

Dual boot windows on second harddrive, UEFI/GPT system

I'd like to install linux, but I don't want to risk damaging my current windows installation as I have heard a lot of horror stories. Fortunately, I have an extra hard drive. Can I install linux ...
0
votes
1answer
484 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 ...
1
vote
0answers
137 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, ...
4
votes
2answers
237 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
1answer
637 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
42 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
52 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
76 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
60 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
0answers
163 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
1answer
135 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 ...
0
votes
0answers
55 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
166 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
59 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 ...
3
votes
2answers
602 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 ...
0
votes
5answers
9k views

Black screen after GRUB

I recently bought a new laptop which came preinstalled with Windows 8 (no! please don't run away yet!). I'd like to try and put Linux on it in a dual boot (probably Ubuntu, with its UEFI support), but ...
3
votes
3answers
142 views

How do I create a utility USB?

I do a lot of work with many different bootable images all on different flash drives. However, it gets annoying to search for a specific drive, plug it in, and use it. Is there a way I can consolidate ...
1
vote
0answers
57 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.
1
vote
1answer
601 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
27 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 ...
0
votes
0answers
170 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
94 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 ...
1
vote
1answer
195 views

How to restore normal boot process after pacman update on EFI?

I just updated my system and upon reboot I've found myself in emergency mode. This is a dm-crypt+LUKS EFI system (thinkpad) using gummiboot. journalctl -xb reports that /boot could not be mounted. ...