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

1
vote
0answers
17 views

UEFI install problems

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
17 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
22 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
546 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
vote
0answers
31 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
64 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
14 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
194 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
88 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
55 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
79 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. ...
0
votes
0answers
193 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
63 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
34 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 ...
0
votes
0answers
128 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. ...
0
votes
0answers
82 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
142 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
105 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: ...
0
votes
0answers
18 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
34 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 ...
1
vote
0answers
228 views

Fedora 21 won't boot anymore; Computer wants me to perform MOK management

I have Fedora 21 installed. Last time it booted, I changed Gnome theme. Then I restarted and now I get following: If I select to continue boot, computer restarts and I get this window again. If I ...
1
vote
1answer
917 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
0answers
122 views

Parititioning for a UEFI boot loader, can LVM be used?

I just bought a gently used laptop and I am trying to figure out why this is. It has a single SSD that when running fdisk -l shows as Disk: /dev/sda. Under it though are 5 "devices" under that disk, ...
0
votes
0answers
64 views

Booting from an lvm-cached volume

I created a cache pool following this article. The process seems to be successful. After doing an upgrade-grub and rebooting, Grub complains that it can not find the root volume (showing a UUID). - ...
1
vote
1answer
147 views

Problems with installing Debian 7.7 on a Vaio laptop

I have a Vaio laptop (Model Number: SVF15218SGB). It had a Windows 8 on it when I'd bought it. After a few months, I decided to migrate to GNU/Linux. Thus I installed Ubuntu 14.04 on it (It was July ...
0
votes
0answers
78 views

Asus dual booting (w8.1 uefi + elementaryOS csm enabled)

I disabled fast booting from windows 8.1 for being able to easily boot to BIOS menu with f2 keystrokes. Then from the BIOS I disabled secure boot, rebooted BIOS, and enabled CSM and pxe oprom (I don’t ...
0
votes
0answers
87 views

Disable ASPM with UEFI

Is it possible to send a boot parameter similar to pcie_aspm=off when only using UEFI boot? I've installed ElementaryOS Freya Beta 1, without the GRUB boot loader, everything works, but I've been ...
2
votes
0answers
428 views

generating redhat 6.5 UEFI iso using mkisofs

i am able to generate uefi iso using mkisofs -quiet -R -J -T -no-emul-boot -boot-load-size 4 -boot-info-table -eltorito-alt-boot -e images/efiboot.img -no-emul-boot -c isolinux/boot.cat -b ...
0
votes
1answer
207 views

Can't boot Windows on UEFI after installing Linux Mint

Okay, so I just put a second hard drive into my computer and installed Linux Mint onto it. Now trying to boot back into Windows I can't, I've tried both the drives from the boot menu and haven't done ...
3
votes
4answers
1k views

Restore EFI boot partition

I am triple booting Ubuntu, Debian, and Fedora. When I installed Fedora from a liveCD I got excited and kept hitting next, not realizing I was not installing GPT, but rather LVM. After doing this I ...
4
votes
2answers
2k views

Dual boot Fedora and Windows 8 gives error: you need to load the kernel first

While there seem to be a lot of questions regarding dual booting Windows and Linux, I did not see one that seemed to cover this problem. That said, I believe a lot of the problems may be fixed in a ...
0
votes
0answers
138 views

Installing Linux on acer travelmate 8573TG

I tried to install linux-mint 17 this weekend. The problem is I can't start neither the live dvd nor a live usb. It always gets stuck on running /scripts/init-bottom A few lines above it prints ...
3
votes
3answers
128 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 ...
0
votes
0answers
512 views

FreeBSD boot problem, UEFI or LEGACY and GPT disk

i have a computer based on GPT disks with triple boot. For the moment i have two OSes working on my computer (OSX and Windows). I want to make a FreeBSD installation, he work perfectly when i boot on ...
0
votes
1answer
625 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 ...
2
votes
2answers
684 views

arch linux boots into grub command line

I'm trying to install arch linux over virtual box guest machine in a UEFI mode. I've followed beginners guide to install base system, generate fstab and etc and my system now boots into grub command ...
0
votes
2answers
3k views

Installing Ubuntu 14.04--Grub Rescue Error after failing to turn off secure boot [SOLVED]

I am not able to start the operating system. Whenever I try to start the operating system it shows the following error: file /boot/grub/i386-pc/normal.mod not found Entering rescue mode... grub ...
4
votes
1answer
334 views

How do multiple boot loaders work on an EFI system partition

My ESP looks like this Boot Dell fedora Microsoft In the Boot directory, their is a boot-loader named bootx64.efi which I understand is the default boot loader that get started first. But in the ...
1
vote
1answer
220 views

Full UEFI System, Grub 2 self-compiled + Clover 2, Debian kFreeBSD installation?

I've a computer with full installation UEFI system, with 2 bootloaders (GRUB & Clover on ESP) clover is the primary bootloader that allows me to load OSX and grub2. I want to make a new install of ...
0
votes
0answers
299 views

Debian Jessie stuck at “Loading initial ramdisk”. UEFI mode

I managed to install Debian Jessie on a MSI G70 2PE Apache Pro that came with Windows 8. First I partitioned some space on the laptop. Then I put on the net install cd for Debian and installed it on ...
1
vote
3answers
806 views

Wrong iso file preventing from booting Debian dvd with uefi

I have this new computer (MSI Ge70 2PE Apache Pro) that came with Windows 8 and UEFI. I made a partition to install Debian testing 64bits on the same HD where Windows is. I had no problem making the ...
0
votes
1answer
109 views

Installing Linux without UEFI

I have a old Dell Dimension 8400 whose motherboard does not have UEFI. I upgraded the RAM to 2 GB. Also, it does not have a CD drive anymore, so the only way to install an OS is through a flash ...
0
votes
0answers
298 views

Ubuntu 14.04 crash on installation - wn-block(2,0)

I'm trying to install the latest version of Ubuntu on my Dell Notebook via Boot via USB (it has no CD driver), but whenever I try to enter the option to test the OS or install it, an big error is ...
1
vote
0answers
624 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
votes
1answer
182 views

Mint 17 via EFI stub on 32-bit MacBook, keyboard doesn't work; fine with Grub bootloader

I'm not necessarily looking for a solution, although that would be great... mainly an explanation. On a MacBook 1.1 using rEFInd boot manager, if I boot Mint 17 Cinnamon 32-bit via the Grub ...
3
votes
2answers
6k 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
73 views

Failed Gummiboot install

I installed Arch-Linux and probably messed up with Gummiboot config. Is there a way to change /boot/loader/entries/arch.conf without doing whole installation process again?
1
vote
4answers
7k 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 ...
5
votes
1answer
514 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 ...