EFI stands for Extensible Firmware Interface, and is an updated version of BIOS. It sits between firmware and the operating system in the software stack.

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Find out by which certificate a kernel module is signed

I have a machine running Ubuntu 16.04 with UEFI and SecureBoot enabled. dmesg shows me that some certificates are loaded in order to verify kernel module signatures: midas@Mothership:~$ dmesg | ...
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What is a reliable method to create a 64-bit WIN7 pro installer (DVD or USB) that boots on (U)EFI systems?

I am failing to start the Win7 pro installer in (U)EFI mode. I know that there are many instructions out there but can someone please point me to a really working solution. Goal: Burn DVD or write ...
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21 views

Windows 7 pro (64bit). Puzzled about (U)EFI install on Lenovo Thinkstation E31

after many years of absence to the MS Win world, I am trying to install a 64-bit Win7 pro in EFI mode onto my Lenovo Thinkstation E31 PC. When I set the firmware to solely work in UEFI mode, I am not ...
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22 views

Allow hibernation on efi based hardware using elilo

I have a fresh install of Slackware 14.2 on my laptop which currently boots in EFI mode. I wanna allow hibernation so I added append="resume=/dev/nvme0n1p3" to elilo.conf (this is definitely my swap ...
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58 views

Windows 10 EFI installation in MBP 8.2 (without bootcamp)

I know this topic has been covered extensively, but trust me, this has not been resolved yet: I want to do an EFI Windows 10 installation on a MacBookPro8.2 (early 2011) running El Capitan. Using ...
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26 views

Moving Windows 10 bootloader to another drive

Here's the situation. I have 2 SSD hard drives in my system, a 128GB and 500GB. Currently, my partition structure is this: 500GB - Ubuntu 16.04 Install Device Start End Sectors ...
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30 views

How to chain windows bootloaders in a GPT / EFI / VHD boot scenario

I will try to be as clear as possible, but realise I might need to refine the question as it can be confusing. Here is my current setup: HDD is GPT, it has 3 partition. Partition 1 is EFI ...
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33 views

Dual Boot on fakeraid

I am having some issues with my MSI notebook: Currently there is Windows 10 installed in UEFI mode and the C: partition is Bitlocker encrypted. The Main disk is a RAID0 which is setup in the BIOS ...
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50 views

EFI and GRUB2 where to get binaries and how to mount the boot system

UEFI and GRUB2 Anybody knows the site to get the binaries (bootia32.efi and bootx64.efi) to boot grub2... also the GRUB2 binaries... and a good tutorial help on this... I want to make a multi-boot ...
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63 views

Restoring Windows Bootloader

Upon trying to install another operating system that used the Clover Bootloader and failing, I now can not boot into my Windows installation, getting boot0ss: error. I never had access to the failed ...
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Windows 10 flashing screen after login

I copied the Windows 10 partition and then in the original used the command "bcdboot e:\windows" to add the second Windows 10 OS. It shows up fine and it even boots, but after I log in I get a black ...
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Recovery partition for identical OS

I have a recovery partition installed and would like the ability to choose which OS to use the recovery for. There are 2 copies of windows 10 installed and one copy is a duplicate of the other. I was ...
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Add windows to efi

I duplicated the windows 10 partition. I want to be able to choose which windows partition to boot into but the second windows copy wont boot. Is there anyway to add the second windows 10 to efi so i ...
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29 views

Can't boot into windows 10

I can't boot into windows 10. The partitions on my ssd are: ESP Reserved Partition (I assume for windows 10) Windows 10 Windows 10 Recovery I can't select which Windows 10 OS to boot into. I ...
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1answer
24 views

Windows recovery partition

If i were to duplicate an OS partition such as windows 10, and both versions are bootable, would either version be able to access the recovery partition? For simplicities sake, original Windows OS ...
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133 views

What is an EFI system partition?

What is an EFI system partition? I have a new laptop with Windows 10. The partitions on the SSD are EFI system partition Windows 10 partition Recovery partition
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MacBook EFI, no sound. Convert to hybrid GBT/MBR?

I only use Windows on my MacBook. So I made a clean installation of Windows without dual-booting OSX. This installation resulted in the Mac is now booting in EFI mode, which led to the sound and ...
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23 views

Error when moving partition

I'm trying to move the partition hfs to the right of the unnalocated space in this image: I'm getting the following error: GParted 0.19.0 --enable-libparted-dmraid --enable-online-resize ...
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51 views

Dual boot with BIOS and EFI?

I installed Ubuntu on a different PC than the one it's running on right now. The old one only had BIOS support, so it's installed that way. I recently installed Windows 7, using UEFI, because it ...
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21 views

Show options of EFI entries

As described in the Arch Wiki, one can create an UEFI boot entry using efibootmgr like this: efibootmgr -d /dev/sdX -p Y -c -L "Arch Linux" -l /vmlinuz-linux -u "root=/dev/sda2 rw initrd=/initramfs-...
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19 views

Two EFI Boot images showing up

I made a Bootable usb stick with linux mint using terminal with the dd command. When I boot my mac and hold the alt key I see my Macintosh HD and I see two times an EFI Boot. Can it be I did something ...
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59 views

Install Windows 10 on an EFI / hybrid MBR Macbook?

I have an 2011 macbook which has been updated to EFI 1.7. Bootcamp sets up a hybrid MBR to support Windows 7. I need to install Windows 10 on this hybrid MBR setup instead of an EFI/GPT setup ...
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23 views

Mac and EFI secure boot

I've recently had a linux live USB completely fail to boot on a mac running El Capitan, which makes me suspect secure boot is rearing its ugly head in the Apple world, as well as the PC world. So my ...
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38 views

UEFI Linux Installation To External Flash Drive

Recently I've bought myself a "Mini-PC" box that came with Windows 10. It only supports UEFI boot (no BIOS). Eager to play with Linux Mint on the box, I've installed it in UEFI mode, making sure the ...
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190 views

*bcdboot* error code [c000003a]

An attempt to restore Windows 7 EFI boot record with bcdboot c:\Windows /l en-us /s f: failed with BFSVC: Failed to create a new system store. Status = [c000003a] Does anyone have a clue what this ...
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27 views

Boot Loaders deleted, How to restore EFI?

I accidentally deleted (Don't really know how) all of the boot entries that appeared on efibootmgr on a laptop that had no operative systems (I did it from an Ubuntu Live USB). Now, when i try to ...
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27 views

Booting linux from grub2 gets kernel panic - root=null

I'm doing my own homebrewed version of linux. The distro works fine but I need to update it to use EFI and GPT partitions. My problem now is that I can't for the life of me get grub2 to boot it. I ...
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121 views

EFI Boot Grub on USB Stick

I'm trying to install ParrotSec Linux on an MBR USB stick. The root folder in mounted on sdc5 and I have an ext2 partition on sdc3 containing grub configuration, vmlinux and initrd. I have another ...
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132 views

can't boot debian, can't change anything with efibootmgr

After a kernel update (Debian Stable/Jessie), my system wouldn't boot. I got back into it by installing ubuntu, and the ubuntu loader will let me boot debian. So now I'm trying to get debian to ...
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41 views

Are there advantages to EFI for Linux guest in Virtualbox

I want to install guest Linux (Arch Linux to be exact) through Virtualbox. Virtualbox has optional EFI support, I'm wondering if enabling it provides any pros for linux guests or not.
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21 views

Installing Arch Linux- Do I need EFI?

I'm installing Arch Linux right now. I want to wipe the whole drive clean. However, there is a partition that is EFI. I don't know what to do with it. Can I delete it?
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46 views

My 3TB HD converted to EFI Partition

I have 3TB HD installed in my pc. I dont know how its converted to "EFI system partition" !! Can I return it back to normal patition without formating or cleaning it? This picture shows that disk 0 ...
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79 views

Recover windows 10 EFI Boot from dual boot with ubuntu

I made my window 10 system system in dual boot with ubuntu. I would like to remove ubuntu and install it in virtual-box within windows. I am afraid to remove ubuntu partions fearing windows may not ...
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1answer
29 views

How to specify a kernel to refind?

How to tell refind to load a specific kernel ? I got the following line : "linux" "rw nomodeset root=/dev/sda1 initrd=initrd.img" But how come that I don't have a kernel= parameter to tell what ...
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149 views

Why can't I load an EFI shell anywhere?

So I recently found out I had EFI instead of BIOS and went to experiment with different .efi programs to see which one I would want for full functionality. From 3 bootloaders I have used, I get the ...
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82 views

How do edit the contents of my BIOS boot list?

So the other day I installed Windows 7 on a GPT disk. It works fine. Today I went to boot off my Linux Live USB and I noticed Windows Boot Manager was in the list. I use a traditional BIOS and it ...
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32 views

Is it possible to update a LSI-9211-8i SAS HBA firmware without EFI?

I am trying to flash my LSI SAS HBA to IT mode from IR mode; I've heard this can't be done in the OS. My problem is that I am using a GA-EX58-UD4P motherboard, and it doesn't seem to know anything ...
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109 views

I created a Windows To Go hard drive and it requires legacy boot

I used AOMEI Partition Assistant Standard Edition 6.0 to create a Windows To Go hard drive (MBR, 4 partitions, Toshiba USB 3.0 v73600-H 2TB) Click for screenshot. I am able to boot to my hard ...
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66 views

EFI Shell: Volume is not mapped to filesystem

I got a MSI gaming 3 mainboard, SanDisk SSD 256GiB, Seagate HDD 1TB the mainboard automatically installed the efi shell v2.31 on my hdd /dev/sda1 after installing windows on the ssd and fedora on ...
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703 views

EFI dual boot windows 7 under fedora 23

I recently installed Fedora 23 on my Windows PC, which is running Win 7 Prof 64 bit. Before that I had a dual boot system with my above Win Sys and OpenSuse which was running after couple of minutes ...
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1answer
182 views

PreLoader.efi: What's wrong with my Secure Boot settings?

I installed Arch Linux with Secure Boot enabled using PreLoader. I enrolled the hash for loader.efi, containing rEFInd, and vmlinuz-linux using HashTools. The problem is that I get a message saying: ...
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44 views

How to install dualboot linux in efi with weird ssd

I'm trying to install linux on my efi computer but still not working. I first installed Windows with 120/510 GB disk in EFI mode, and then want to install linux but every single linux just doesn't ...
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63 views

Can a 64-bit OS be loaded on a 64-bit processor when the EFI is 32-bit?

I'm struggling to get a Chromebook loaded with a new OS. The Chromebook is a Toshiba CB35-B3330, and it has a 64-bit Intel Celeron N2840. I'm struggling because I can't get any useful information on ...
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234 views

How to add booting parameters to the kernel with bcfg from the EFI shell?

efibootmgr is creating invalid entries in the EFI boot menu. For instance efibootmgr -c -d /dev/sdX -p Y -l /EFI/refind/refind_x64.efi -L "rEFInd Boot Manager" adds an unbootable japanese characters ...
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90 views

How to launch vmlinuz-linux from efi shell?

How to start vmlinuz-linux from efi shell ? I jump into the ESP and type vmlinuz-linux (vmlinuz-linux is in the ESP) but it says vmlinuz-linux isn't recognized as an internal or external command, ...
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23 views

EFI Boot Shell Doesn't Work

Currently using an MSI Z97S (not sure if that matters), but when I try to boot into a Windows 10 USB, it skips it, and if I turn on Windows 10 mode, it goes straight to an EFI shell. I did look it up, ...
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212 views

Grub2 EFI falls to Grub Shell unless I hit F12 immediately after power on

I have Opensuse Tumbleweed together with Windows 10 on my Asus ROG laptop. The issue is quite weird - every time I power on or reboot, Grub2 EFI falls to grub2 shell and randomly it doesn't see the ...
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91 views

Correcting EFI boot entry for DVD drive to install Win 7 in EFI mode?

Running sudo efibootmgr -v on Kubuntu Trusty on my old Lenovo Z570 laptop gives the following output: BootCurrent: 0006 Timeout: 1 seconds BootOrder: 0006,0005,0003,0004,0007,0002 Boot0000 Setup ...
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30 views

partition resize breaks EFI USB installer

I have a 64GB GPT USB stick, containing EFI installer partitions for Windows 7, Windows 10, 5 linuxes, and a Clover BootLoader to launch an El Capitan installer for Hackintosh. It all works ...
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260 views

Repair an error:read-only efi partition

Again stumbling from one problem to the next. I recently installing OpenSuse13.2 parallel to win10. Worked nice. Then I decided to reintall, but Suse Leap, deleting the old Suse installation. At the ...