Questions tagged [uefi]

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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10
votes
4answers
8k views

What should I do before dual-booting Windows 7 and Debian on EFI?

I'm about to purchase an Asus motherboard with EFI firmware and wanted to prepare myself for installing Windows and Debian once the hardware arrives. I was hoping that someone who has gone down this ...
4
votes
6answers
15k views

Kali Linux is Installed but not showing in boot manager

I recently bought a new Laptop: Lenovo IdeaPad 320e Intel i5 7200 2.5GHz processor 8Gb RAM 2Gb NVidia 940mx Graphics 1TB HDD It came with freeDOS so i installed Windows 10 on it on EFI mode. A few ...
31
votes
8answers
118k 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 ...
51
votes
2answers
49k views

How to know if I'm booting using UEFI?

I was searching, but didn't find an obvious way to know if GRUB is using UEFI in the system boot, or the BIOS compatibility mode, or a full fledged BIOS. I found only Windows methods. Is there ...
15
votes
1answer
24k 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 ...
17
votes
1answer
16k views

UEFI + BIOS bootable live Debian stretch amd64 with persistence

All of the information I currently find on this matter is insufficient for my taste. It is either outdated, misleading or even wrong, seems overly complicated or not covering this specific question. ...
1
vote
1answer
4k views

how to achieve optimal alignment for emmc partition?

We have bbb based custom board containing eMMC. And we have created partitions as follows, parted --script -a minimal /dev/mmcblk0 \ mklabel gpt \ mkpart primary 131072B 262143B \ mkpart ...
30
votes
1answer
41k views

Can GRUB2 share the EFI system partition with Windows?

I have an existing Windows 7 GPT installation, which already has a EFI System partition. I am now trying to install a Linux on a separate harddisk, which is also GPT formatted. I did not find any ...
19
votes
9answers
109k views

GRUB starts in command line after reboot

I installed Linux Mint on my laptop along with a pre-installed Windows 10. When I turn on the computer, the normal GRUB menu appears most of the time: But after booting either Linux or Windows then ...
3
votes
0answers
586 views

Questions Regarding UEFI Shell - Version 2.0 Wanted

I bought a cheap laptop for myself last Christmas, just because I wanted a laptop. A Toshiba Satellite C55-A5310 on special. I'm also a big believer in OEM software for laptops, so I left Windows 8.1 ...
7
votes
1answer
10k 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 (...
5
votes
3answers
271 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
1answer
3k views

RHEL Installation issue with UEFI on HP Compaq Desktop

I have bought a new Desktop HP Compaq Elite 8300 SFF. It came with Windows 7 Pro installed. Now I want to install Linux (RHEL) by dual booting it. I have successfully shrinked the partition and ...
1
vote
1answer
264 views

Determining EFI text modes supported by notebook

I am using a Lenovo Ideapad 100S IBR 14'' in FreeBSD 12.0 I need to setup a different EFI text mode, to change the screen resolution upon boot. As in this question Using native 1366 x 768 resolution ...
0
votes
1answer
738 views

Can the EFI System Partition be a logical partition on MBR disks?

I'm finding a lot of information concerning the ESP inside GPT disks, but none about them being inside an MBR based disk as a logical partition. The thing is, I don't want to convert my disk to GPT ...
17
votes
5answers
70k views

“EFI variables are not supported on this system”

I am attempting to install Arch linux to a new (and very crappy) HP Pavillion 15 Notebook. This is a UEFI-based machine. After several swings at it, I have managed to get pretty far. Legacy mode is ...
11
votes
1answer
6k views

Installing FreeBSD alongside Linux

I am using Arch Linux with GNOME, I want to install FreeBSD alongside Arch Linux with the following requirements : I want to keep the Linux GRUB and add an entry of FreeBSD to it. I want to use ...
8
votes
2answers
14k views

How to recreate EFI boot partition?

I've installed Fedora on my machine with / partition, swap partition and ESP partition for EFI booting. Now, I was installing Elementary OS instead of Fedora. I have formatted the / partition (/dev/...
3
votes
1answer
14k views

How do I repair grub2 (not) booting 32-bit EFI on a 64-bit machine?

I have an Asus EeeBook X205TA which proves very difficult to install Linux on due to obscure new hardware and 32-bit EFI on 64-bit hardware. I have seen and read a lot of material and I am almost ...
18
votes
2answers
2k views

The UEFI & SecureBoot impact, how severe?

I'm planning to buy a new laptop in the coming days, and I'm quite impressed with new, cool Ultrabooks. As a long-time GNU/Linux user, I'll of course install a distro of my choice on it. Chances are ...
11
votes
3answers
39k 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 ...
9
votes
3answers
7k 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 14....
2
votes
1answer
11k views

Installing debian 7 besides windows 8

I bought a VAIO laptop which Windows 8 preinstalled on it in UEFI mode. Now I want to install Debian 7 besides Windows 8 but when I entered to the Partition Setup of debian setup menu, there is a ...
6
votes
4answers
33k views

How to repair CentOS ? Failed to mount /sysroot

I have installed centOS 7 on my machine and I am using it for last 4-5 month it was working fine. But few days back due to power cut (un-proper shut down) there is something bad happened with my ...
6
votes
3answers
6k views

Partitioning EFI machine with two SSD disks in mirror

I have two SSD disks, I want to put them in a software mirror RAID. But whatever I do the OpenSuSe installation keeps telling me that due to the partitioning scheme he won't be able to install the ...
4
votes
3answers
9k views

(UEFI) Chainloading GRUB from GRUB

Terminology: ESP = my FAT32 EFI partition. I want to: Have a self-contained GRUB install on my ESP that chainloads another GRUB bootloader on my distro root filesystem (/). I currently have several ...
2
votes
2answers
4k views

How to install Debian with full disk encryption for UEFI?

So I'm trying to install the latest version of Debian on my SSD drive with UEFI. I'd like to use the CinnamonKDE desktop environment and have my drive fully encrypted. I used Windows 10 before and am ...
6
votes
6answers
38k 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 ...
6
votes
1answer
6k views

How does grub2 find its configuration file in EFI boot?

There are bazillions of grub2/EFI threads on the net, but I found it difficult to find an answer to the question above. We have been told that in grub2 the configuration file is /boot/grub/grub.cfg. ...
5
votes
1answer
8k views

Timed out waiting for device dev-disk-by\x2duuid-C829\x2dC4C1.device

I had formatted efi partition and installed windows again. I have dual boot Windows and Linux, then I installed the grub bootloader again from a live usb using these commands: mount /dev/sda* /mnt ...
5
votes
1answer
7k views

32bit EFI with 64 bit linux OS. Can it be done?

I have a 32bit ubuntu linux install on an hp stream 7 tablet. For the sake of long term support I would like to install 64bit ubuntu linux on this device. The tablet has a 64 bit intel baytrail ...
4
votes
1answer
1k views

Installing Debian with encrypted root: installer does not see EFI /boot partition

I am trying to do what I think is a pretty standard setup of encrypted / partition and unencrypted /boot using the Debian installer (for Stretch-rc1). I created /boot by selecting the option EFI ...
3
votes
2answers
2k 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 ...
3
votes
1answer
2k views

How does GRUB 2 work under multiple Linux partitions with UEFI

When we install a new Linux, the installer will install a bootloader (efi file) at EFI partition and update the menu entry at NVRAM, and most likely set the newly added bootloader as default. The ...
1
vote
0answers
522 views

why is grub2 ignoring kernel options when boot from el torito on CD?

I have a simple manually created grub.cfg file, which I load into grub-mkimage, then build into an el torito image on an iso9660 iso. Everything actually boots, but the kernel options are ignored ...
0
votes
1answer
422 views

Dual boot Windows 10 and Kali linux

I installed kali linux next to windows 10. After the installation of linux, the system worked normally but when I started rebooting the computer GRUB disappeared, and only windows 10 turned on. Then I ...
6
votes
2answers
22k views

Installing Debian: Force UEFI, what does it affect?

I've got a laptop here that came with a Windows 8 installation. What I did: Removed the harddisk, put in an SSD, and now I've (unsuccessfully) tried to install Debian. I've used all the default ...
5
votes
1answer
3k views

Partitioning 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, ...
5
votes
2answers
3k views

grub error : “File not found” for separate /boot/efi partition

I've installed CentOS 6.4 on UEFI enabled machine, created /boot/efi partitions. But my grub is not automatically starting, if I start the PC, I start in Windows 8. I can only start CentOS by ...
4
votes
2answers
8k 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 ...
4
votes
1answer
723 views

Is there a free (libre) open source alternative to memtest86+ that works with UEFI?

In light of memtest86+ not working with UEFI, is there an open source alternative or something I can use from grub to test memory?
3
votes
1answer
630 views

UEFI firmware resetting bootorder

I am trying to boot Fedora 23 that I have just installed on a laptop, replacing Windows. I just can't boot it. I kept the UEFI boot partition but replaced all the other partitions with Linux ones. The ...
3
votes
1answer
998 views

Problem at booting Windows from GRUB2 menu made by Debian for itself

I've Asus UEFI motherboard with 2 hard disks, (hd0) and (hd1). I managed to make my Debian Wheezy on my second disk bootable using grub-efi and it boots OK. I also have Windows on the first disk, ...
2
votes
1answer
1k views

(32bit or 64bit) Linux distro with !32bit! (U)EFI support?

Is there a Linux distribution that supports 32bit-(U)EFI? If so, which one and where do I find a bootable ISO? I'd like to find a Linux distro for my HP Envy X2 which has an Intel Atom CPU and ...
2
votes
2answers
454 views

Copying a non-EFI/GPT installation to a EFI/GPT installation

I recently purchased 2 SSDs (my first), and will be moving my system there. I'm using MD RAID 1 + LVM. I haven't yet decided whether I will be setting up a new stretch installation, or copying my ...
2
votes
1answer
981 views

Using UEFI boot mode for Gentoo Linux installation on OracleVM VirtualBox instance after April 20, 2017

I'm installing Gentoo on an OracleVM VirtualBox 64bit instance on my Intel i7-7700k machine. I am assuming my machine and the VM both support UEFI boot mode, but there is a note in the Gentoo Handbook ...
2
votes
1answer
3k views

Fixing Lilo with uefi system and no optical drive

Recently I have been trying to boot into Slackware on a new laptop that came pre-installed with Windows 8. I have successfully installed Slackware and Lilo, but I have had great difficulty trying to ...
2
votes
0answers
232 views

How to get Windows on grub menu? Using two HDDs; Windows bootloader on first

Here is some background. I had a 1TB HDD with Windows inside it. Partitions something like this: I bought an another hard drive of 2TB and wanted to dedicate 1TB to Windows and another to Linux. Here ...
2
votes
1answer
2k views

“error setting up gummiboot-efi” on Archboot UEFI install

I recently purchased an Aspire XC600, but am having trouble installing Arch. I haven't installed on UEFI before. I want Arch as the only OS on the disk. I wrote the Archboot x86_64 image to a USB ...
1
vote
6answers
21k 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 ...