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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2
votes
1answer
962 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 ...
-1
votes
0answers
35 views

Elementary OS installs… wrong [on hold]

When installing elementary os freya on a new Lenovo X1 Carbon (with a Broadwell processor), letters and icons are missing from window titles and settings, rendering the os virtually unusable.
3
votes
3answers
2k 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 ...
2
votes
0answers
31 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 ...
0
votes
1answer
1k 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 ...
1
vote
1answer
1k 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 ...
6
votes
1answer
4k 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
103 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
65 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, ...
3
votes
2answers
151 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 @ ...
3
votes
1answer
568 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
1answer
404 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 ...
5
votes
1answer
576 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 ...
0
votes
1answer
753 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
3answers
14k 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
875 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, ...
0
votes
0answers
33 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, ...
4
votes
1answer
940 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. ...
0
votes
0answers
41 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
889 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
1answer
45 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
44 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
127 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
88 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
34 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
82 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
30 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
577 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
8k 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
136 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
44 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
417 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
21 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
145 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
79 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
157 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. ...
2
votes
1answer
806 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 ...
0
votes
0answers
243 views

Grub environment block on Centos 7 with efi?

How do I modify the default or next-boot boot entry for the next reboot on Centos 7? I need to switch back and forth between kernels frequently. The machine is in a different room, so it is most ...
0
votes
1answer
87 views

“Disk space full” - Linux Mint as Dual Boot on UEFI Windows

I'm trying to install Linux Mint 17.1 in UEFI mode on an Asus PC with Windows 8.1 preinstalled. The 250GB-SSD with Windows preinstalled is /dev/sdb/. I partitioned 125GB for use with Ubuntu (Linux ...
0
votes
0answers
43 views

Too many UEFI boot entries

Windows 8.1 and Ubuntu 14.04 dual UEFI boot. My notebook only has one disk device. The Grub 2 entries are normal with only Windows and Ubuntu entries. However, when entering BIOS setting, I can see ...
5
votes
2answers
7k views

Installing linux on an 32bit UEFI only machine

I have a Intel BayTrial Z3735D tablet which comes with a 32bit UEFI BIOS. After some search I've found that most linux distro don't come with a 32bit efi file. How can I insert one (or build a new ...
0
votes
0answers
150 views

Multibooting in Secureboot mode - vmlinuz invalid signature

My system has Windows 8.1 installed by default. I installed LinuxMint and openSUSE later. The problem is that if I use the openSUSE bootloader (GRUB2), it is able to load Windows but not Linux Mint. ...
1
vote
4answers
9k views

USB booting to installing Linux on a new Lenovo laptop

I recently got a Thinkpad T440s with Windows 8.1 for my job, and since most of my work is done under Linux I am going to install Ubuntu on it, so that I can dual boot. The problem is that it won't ...
0
votes
0answers
100 views

Problem loading Zorin after install

I have tried to install Zorin.To install the OS I went to my UEFI BIOS turned off fast boot and Disabled secure boot option. After that I loaded my USB and installed the OS. Everything went perfectly ...
0
votes
1answer
1k views

UEFI installation failed Fedora 21

I have installed Windows 8.1 on my Lenovo laptop. When I configure partitions I receive this error: No valid bootloader target device found. For UEFI installation , you must include an EFI System ...
0
votes
0answers
171 views

grub2 cannot boot windows (EFI) - Invalid Sector Size

I've been booting my Fedora 20 / Windows 7 Home Premium system using Grub2 for quite some time now. But after updating the system after ~9 months of no updates, I can no longer boot into Windows 7. ...
0
votes
0answers
146 views

Avoid Booting Fedora in Failsafe Mode

I recently bought a Lenovo G50-45 and managed to setup a dual boot system with Windows 8.1 and Fedora 21 (UEFI booting). But when I boot Fedora, the following error message shows up: [1.079848] EFI: ...
15
votes
5answers
30k 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
0answers
23 views

Dual-boot ends with Dual-Bootloaders

Having just bought a new laptop out of necessity, and ending up with Windows 8.1, because I work from home and the company only supports windows, and the identical 7 machine was almost $100 more than ...
0
votes
0answers
36 views

Problem booting with Grub

Long ago I installed a OpenSuse but finally decided to remove it for non-important reasons. Right now I have installed ubuntu. My problem is : I cant get my system to fire on grub instead of the ...