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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1
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0answers
35 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
31 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
46 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
19 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
36 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
30 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
8 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
39 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
87 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
196 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
409 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
58 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
63 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
279 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
232 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
165 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
831 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
74 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
127 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
217 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
303 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
57 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
209 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
196 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
93 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 ...
2
votes
1answer
2k 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
48 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
3answers
2k 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
250 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
571 views

Antergos installer says I have no /boot partition

When attempting to install Antergos(Arch-based Linux distro) I am told that it cannot install as I have not specified a /boot partition, when I appear to have done just that. I have attached a picture ...
1
vote
2answers
603 views

Grub menu not appearing

I have a windows 8.1 installed in my lenovo z570.I installed linux mint 17 from an USB created using YUMI software. After installation the grub menu doesn't appear and windows gets booted up ...
2
votes
0answers
130 views

linux boot manager has been blocked [SOLVED] [closed]

I've just installed arch linux on a UEFI motherboard. as bootloader I installed "gummiboot". I've got the following problem, when the computer stars I recive the message: "Linux Boot Manager has been ...
3
votes
0answers
379 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 ...
2
votes
1answer
2k views

How much speed difference for a tweaked bios versus uefi boot? [closed]

EFI can be faster, but that's not certain. The biggest speed difference is in hardware initialization early in the process. On my systems, this is a fraction of the total boot time, so a ...
7
votes
2answers
2k views

How to know if I'm booting using UEFI

I was searching, but didn't found an obvious way to know if GRUB is using UEFI in the system boot, or the BIOS compatibility mode or a full fledged BIOS. Only Windows methods. Is there something in ...
2
votes
0answers
25 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 ...
4
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 ...
0
votes
0answers
440 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
78 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 ...
2
votes
1answer
3k views

Arch Linux on an UEFI-GPT system with Windows 8.1 dual booting [closed]

I'm going to install Arch Linux on an UEFI computer. I've also Windows 8.1 installed and I would like to keep this operating system in dual boot with Arch. I should ask many questions, because this is ...
0
votes
0answers
114 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 ...
2
votes
1answer
561 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
vote
2answers
828 views

Cannot install Ubuntu on EFI/GPT scheme

Shame on me, I have more than 10 years using Linux and all of this about EFI and GPT is a nightmare :( I have a Dell Inspiron 14z Ultrabook and I cannot install Ubuntu; when I launch the installer it ...
1
vote
1answer
242 views

Which device to install the bootloader should I choose?

I have an Acer Aspire E1 with Windows 8.1 installed from factory. I need to install in dualboot the Linux Mint without formatting the computer and safely. I kept the UEFI and deactivated the ...
1
vote
2answers
2k views

UEFI - Linux Mint Boot from USB Doesn't work

I'm running Linux Mint (only OS other than in VirtualBox) and wanting to remove it. I've created a Live USB of Windows 8 using Windows 7 USB/DVD Download Tool - Yes, I know it says Windows 7 but I've ...
0
votes
1answer
230 views

Mint 16 - Won't boot to USB

I am attempting to completely remove my Linux Mint 16 MATE OS and reinstall Windows 8. At which point, I'll decide if I want to reinstall a Linux OS (most likely will). The issue I'm having is that my ...
4
votes
1answer
431 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
61 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 ...
0
votes
1answer
591 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 ...