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

6
votes
0answers
251 views

How do I use the TPM to seal away data on an UEFI booted system?

I would like to seal away files on my system using keys stored in the TPM. Since my system uses UEFI to boot, I can no longer use TrustedGrub as a boot loader to maintain my trust chain. Are there any ...
5
votes
0answers
2k views

UEFI install (14.04) boots to GRUB command prompt, no GUI

I just installed zorin 9 core (14.04) on my Hard-Disk in UEFI mode. But, when I boot, all that comes up is a GRUB2 command line. I've searched for solution and came up with this command configfile ...
4
votes
0answers
889 views

When do I need to specify add_efi_memmap as kernel argument in UEFI/EFI boot?

I am reading some tutorials how to EFI stub (efistub) load the Linux kernel. These instructions often use kernel boot parameter add_efi_memmap. The intended hardware is Intel x64 having 8GB of RAM. My ...
3
votes
0answers
173 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, ...
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 ...
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 ...
2
votes
0answers
573 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 ...
2
votes
0answers
32 views

Signing GRUB bootloader

The laptop I recently bought uses UEFI. As an experiment, I think it would be really cool to generate my own keys and use them to sign my bootloader, and also to password protect the bootloader. How ...
2
votes
0answers
457 views

Dual boot Linux Mint in a GPT style hard drive along with Windows 8

I have a Sony VAIO e series laptop which came with Windows 8. I wish to install Linux Mint as additional operating system. Only at the time of installation I could find that my HDD is of GPT partition ...
2
votes
0answers
310 views

How do I use custom-signed shim for secure boot (Fedora)?

I'm not sure whether there's a guide for this but I'd like to know the detailed steps (step-by-step guide perhaps?) involved in achieving the following: Re-sign shim with a custom CA private key, ...
1
vote
0answers
66 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
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
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
0answers
248 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
0answers
750 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 ...
1
vote
0answers
289 views

Linux / Windows 8.1 : Installation on raid0

I need to install a linux distribution on my laptop (an Asus UX302LA). I tried again and again but I couldn't even begin the installation. To explain you my problem, I know that Windows 8 is installed ...
1
vote
0answers
242 views

Booting from USB devices on secure boot UEFI system

I'm trying to put an ArchLinux install onto a USB-HDD and want it to be bootable on BIOS systems as well as on UEFI systems that use secure boot. Therefore I have one main question. Does an UEFI ...
1
vote
0answers
99 views

Searching for i686 UEFI distribution of Linux

I m trying to put a dual boot Windows 8 - Linux on a HP ENVY j069-sf (i686). Like all HP laptop, there is a lot of proprietary drivers (even when installing Windows, I had to take 2 hour to search, ...
1
vote
0answers
505 views

Dual Boot Windows 8.1 & Linux Fedora 19 (BootLoader Error)

I installed Win 8.1 in first drive C: and then attempted to install Fedora 19 in D: but after install, all packages in bootloader installation Fedora show the following error: An unknown error has ...
1
vote
0answers
397 views

ubuntu winboot wubildr.mbr missing

I have installed Ubuntu 12.04 (64 bit) operating system, It supports uefi so I installed it like a normal dual booting Now(not like wubi), when I try to load Windows8 it works fine. But when I try to ...
1
vote
0answers
40 views

GRUB2 Edit Mode problem

I have recently installed Fedora 18 using UEFI. The problem I'm facing is that when I try to go into edit mode in GRUB, my PC freezes, displaying just a black square instead of text. Unfortunately I ...
1
vote
0answers
1k views

Install Arch(Bang) - Create Usb - Uefi

I am pretty new to Linux and want to install ArchBang-Linux, but I fail at creating a bootable USB-Stick. Can someone explain this procedure to me in a little more detail? ...
0
votes
0answers
36 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
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
0answers
46 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
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. ...
0
votes
0answers
128 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
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
146 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 ...
0
votes
0answers
245 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
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 ...
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. ...
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
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: ...
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 ...
0
votes
0answers
78 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). - ...
0
votes
0answers
87 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
114 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 ...
0
votes
0answers
147 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 ...
0
votes
0answers
544 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
0answers
327 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 ...
0
votes
0answers
311 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 ...
0
votes
0answers
76 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?
0
votes
0answers
526 views

Fedora 20 on Macbook Pro Retina 11.1 (Late 2013)

I've got myself a new Macbook last week but I just can't get used to OSX and would like to use a Ubuntu, Debian or Fedora installation as Main OS. I have installed Fedora without a bootloader as the ...
0
votes
0answers
2k 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 ...
0
votes
0answers
110 views

NTFS-fs warning (device sdaX): load_system_files()

I'm installing Arch Linux on a UEFI-GPT computer, dual boot with Windows 8.1. GRUB is installed correctly, but when I inserted the command (on chroot) grub-mkconfig -o /boot/grub/grub.cfg I ...
0
votes
0answers
134 views

Windows 8 booting issue from GRUB

I dual booted Windows 8 and Kali Linux(1.0.7) with Kali installed in legacy mode(because my laptop doesn't allow me to boot from any external device in UEFI mode,it says system does not have DVD/CD or ...
0
votes
0answers
79 views

Installed Ubuntu (on its own partition, Windos 8 machine) and lost both boot options in BIOS

I partitioned the unit in Windows first, and after I disabled Windows in BIOS because it wasn't allowing the boot CD to load. After the installation, the option to enable Windows and the option to ...