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.

208 questions with no upvoted or accepted answers
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uefi bootloaders for distributions

I have stared reading about uefi recently and got to know that SYSLINUX and GRUB2 have their own uefi bootloader. i have few confusions specially in terms of pxe boot. 1) Are distributions use their ...
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54 views

How check EFI revision?

How can I check the (U)EFI revision (or specification version) of my laptop NB: I don't mean the EFI/BIOS version provided by the manufacturer of the laptop/motherboard
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6k views

Black screen after booting in UEFI installation of Arch Linux

My laptop is Asus K53SV, you can find its specification here. I tried to install Arch Linux with UEFI boot method, and I stuck at a black screen after press Arch Linux archiso x86_64 UEFI CD. ...
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5k 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 isolinux/...
4
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2answers
1k views

Updating kernel versions when booting from rEFInd

I'm booting from EFI using the awesome rEFInd bootloader. I've so far had to configure boot myself by manually copying over my EFI-compatible linux boot image to my EFI partition and writing a ...
4
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1answer
651 views

UEFI boot Fedora from USB 2.0 on 3.0 port (l75d-a7280)

I'm trying to make a bootable usb in ubuntu for fedora, but my settings are not working. I formatted the USB with FAT & Ext4, MBR, and Legacy BIOS bootable. My BIOS allows the USB 3.0 controller ...
4
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1answer
1k views

How do I dual-boot 2 (or more) Linux distributions with gummiboot and UEFI?

I have Arch installed as my main OS with gummiboot for booting. I'm planning to dual boot with Fedora 20 soon but I am currently held back by some doubts. Do I need to install Grub2 for Fedora even ...
3
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0answers
156 views

kexec: relocate_kernel fails

I am not able to get kexec to work. For x86_64 relocate_kernel fails to store information for jumping back. Kexec stops in movq %r9, CP_PA_TABLE_PAGE(%r11). works fine for kernel 4.4.162, doesn't ...
3
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0answers
138 views

FreeBSD 11.2: how to resize the boot options menu on a UEFI/GPT/ZFS machine?

Is there a way to resize the boot options menu in Freebsd 11.2 on a UEFI/GPT/ZFS machine (zfs-on-root)? On multiple machines, the installation resulted in the boot options menu being rendered in a ...
3
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1answer
380 views

Full clone of encrypted disk not bootable on other computers

I have made a full disk clone of my encrypted S2 disk to an external USB disk with dd if=/dev/nvme0n1 of=/dev/sdb status=progress The S2 disk was not mounted when cloning, I used a live distribution ...
3
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0answers
873 views

UEFI-support for Debian Live-build

I'm building a custom Debian using live-build, and after dd-ing the iso to the USB-stick it boots fine on BIOS-computers, however it does not seem to support UEFI, thus not booting on newer computers. ...
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4k views

Grub2 can't detect Windows 10, Dual boot on two harddrive, UEFI/GPT system

I have two ssd which there is Windows 10 on the /dev/sda1 and OpenSuse on /dev/sda3 (/dev/sda2 is for a storage hdd). I have been installed Ubuntu on my /dev/sda3 couple months ago. But because of ...
3
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0answers
5k views

Sign GRUB2 bootloader to enable UEFI secure boot

Following preliminaries: Linux 4.2.3-gentoo GRUB2 UEFI, Secure Boot off Now, I want to mess with the secure boot so I'm able to turn it on. More or less following this guide, I have: backed up the ...
3
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1answer
541 views

Preinstalled windows 8.1 not booting after installing Linux mint 17.1

I have pre-installed windows 8.1 on my machine and its a uefi enabled machine. I installed linux mint 17.1 on this by the side of windows 8.1. As I was unaware about the approach to install linux ...
3
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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 ...
3
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1answer
2k views

Read Apple nvram

On Mac OS X there is a tool called nvram to get and set EFI properties. As I am now deploying GNU/Linux on Apple hardware, I'd like to have a similar tool that is able to talk to Apple's EFI ...
3
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1answer
2k 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, but ...
3
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2answers
110 views

How can you configure a system to be bootable from most modern systems?

How can a Linux system be installed on a portable storage medium so that both BIOS systems (e.g. a ThinkPad) and EFI systems (e.g. a Mac Mini) can boot to it? The reason I ask is because I tried ...
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4answers
5k views

Dual booting Ubuntu and Windows 8. w8 boots through grub shell, but not from menu

I have a laptop, with installations of Ubuntu 12.10, and Windows 8. Windows 8 was first installed on the system, and Ubuntu was installed afterwards. During the Ubuntu installation, the installer ...
3
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1answer
1k views

How to configure GRUB to load Windows 7 Install in UEFI mode

I have a Dual-Boot USB I created with Multisystem for booting into PartedMagic, Ubuntu 11.10 & Windows 7 Install. Problem is Windows 7 says it can't install on a GPT partition. Googled, and found ...
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0answers
44 views

Slax 9: can't boot from FAT32 partition created via UNetBootIn because of UEFI on cheap laptop

I have this budget (read: cheapo) laptop, a Schneider SCL141-CTP, with an Intel Atom X5 Z-8350 SoC, 2 measly gigs of RAM and a ridiculously small 32GB eMMC SSD, that's running Windows 10 Home, and ...
2
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0answers
80 views

Unable to mount Mac's EFI partition from Ubuntu Live USB

I've tried to mount my mac's EFI partiton while using an ubuntu live USB, however I get the following errors: ubuntu@ubuntu:~$ sudo mount /dev/sdb2 /mnt/efi mount: /mnt/efi: /dev/sdb2 already mounted ...
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0answers
85 views

how is the boot directory of the EFI/ESP partition related to the boot directory of the root partition?

are the files inside these 2 directories mirror images of each other? how are they related? for example the below command that i execute: sudo cp -a initramfs-4.18.16-300.fc29.x86_64.img /boot/EFI/...
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0answers
470 views

Deepin Installer won't start - stuck on black screen with single dash

I have just bought an Asus Zenbook UX433FA, on which I want to install Deepin 15.8 as my only OS. I have followed the installation guide on the Deepin website, therefore creating a bootable USB device ...
2
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0answers
205 views

Arch Linux (k4.17) boot failure on Baytrail

I recently installed Arch Linux on one of the cheap windows tablet. I chose arch linux, because it had latest kernel, and in kernel 4.12 the rtl8723bs wifi driver was mainlined. I was surprised how ...
2
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1answer
187 views

FreeBSD, update UEFI boot after motherboard change

I had a FreeBSD 10 installation that booted under UEFI. It's on an AsRock C2750D4I motherboard. Recently I've had the motherboard replaced under warranty and now I can't boot the server automatically. ...
2
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1answer
11k views

Messed up boot - System BootOrder not found

I am attempting to install Ubuntu 17.10. What's happening: I turn on PC Get a message that I can't read in time, something along the lines of: System BootOrder not found. Initializing defaults. PC ...
2
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0answers
374 views

How to make separate EFI bootloader entries for Linux Mint and Ubuntu?

When I install a GRUB bootloader entry (with grub-install --target=x86_64-efi --efi-directory=/boot/efi /dev/sda) from Linux Mint to my hard disk, it overrides my Ubuntu bootloader entry in EFI. To be ...
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0answers
1k views

How to prevent Windows 10 from clobbering GRUB?

Asking for clarification about: [1] How can I prevent Windows from overwriting GRUB when using a dual-boot machine Christopher's answer says: "Windows will overwrite the boot sector whenever you ...
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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
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0answers
317 views

PXEBoot UEFI not downloading configuration files

I setup dnsmasq (ver. 2.76 to support UEFI) When the client starts the DHCP requests are made. Proper file name is propagated to the client (via TFTP) but client only downloads this grubx64.efi file ...
2
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1answer
768 views

How can I boot Debian from a USB drive from Windows 10?

This question isn't about creating a bootable USB; I already have. I followed Alexander Maru's instructions on this StackExchange post. What I want to know is how to boot Debian from a USB drive. I ...
2
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0answers
447 views

Can't boot arch in EFI mode, rEFInd stuck in installation

I have been trying to install arch on my mid-2011 Macbook air, I moved the ISO to an 8GB USB-Drive with: dd bs=4M if=/home/ronnie/Downloads/archlinux.iso of=/dev/sdb status=progress && sync ...
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0answers
7k views

Backup GPT table is corrupt. Fix will disappear at reboot

My recently installed ubuntu 16.04 system is not behaving correctly (does not boot). I did check the status of the hard drives using fdisk and I discovered that somehow the backup GPT table is corrupt....
2
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2answers
2k views

What are all these other in grub options and which are safe to remove?

I recently uninstalled Ubuntu 16.04 and installed Peppermint 7 instead,I had a few problems with grub not showing but fixed it by running bcdedit /set {bootmgr} path \EFI\ubuntu\grubx64.efi in admin ...
2
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0answers
210 views

How to escape a BIOS failure?

While attempting to install deepin linux onto my new netbook, I worked myself into a corner that I do not know how to escape. 1) I loaded the deepin installer onto my USB stick as per instructions, ...
2
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0answers
1k views

Install CentOS on RAID (manually) on UEFI system

I'm struggling with the manual configuration of a RAID1 + RAID10. I'm trying the procedure on a VM (VirtualBox 5.0.14 r105127) on OSX 11.10.3. The strategy I took is: The complete set of commands I ...
2
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0answers
167 views

Hibernate mode in uefi on linux

I wanted to know how sleep and hibernate mode work on UEFI. Basically I want to know which files are created and/or edited when a linux machine is put into hibernate mode. I read online and found out ...
2
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0answers
214 views

EFI boot and RAID6

I am trying to install SLES on a server with 8 HDDs, 3 TB each, but I am testing the configuration first on a VM (virtualbox). I tried following configurations and both got me stuck at the EFI Shell: ...
2
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1answer
246 views

UEFI and LVM causing BIOS to hang under various conditions

Using Fedora 23 with LVM on a Toshiba C50-B-021 laptop with UEFI, the BIOS will hang on boot every time: the computer runs out of battery, it is turned off for more than a few seconds, a new ...
2
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0answers
96 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
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1answer
1k views

How can I chainload GRUB on another drive?

I have two pen drives. On one I have a full install of Arch GNU/Linux. This install is compatible with both EFI systems and BIOS systems; it has a GPT drive with a BIOS Compatibility Region and an EFI ...
2
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0answers
534 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 ...
2
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0answers
637 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
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0answers
283 views

Boot linux bootloader from Mac OSX

I was running Fedora 17 on my computer which was an HP windows based machine. Unfortunately my computer has a malfunctioning motherboard and will no longer turn on. I removed the hard drive and using ...
2
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1answer
5k views

Grub 2, Windows 10 not automatically added, manual entry not working either

Here is a link to my previous Question here asking this info, but that info is outdated as Grub did not work when I originally had Windows 7 installed. Installed Manjaro on seperate drive, Windows 7 ...
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0answers
21 views

How to use qemu boot a physical efi disk

I create a minimal linux system in /dev/sda recently, the disk contains two partition: Device Start End Sectors Size Type /dev/sda1 2048 1050623 1048576 512M EFI System /...
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0answers
53 views

grub2 dual boot Windows XP with UEFI firmware

I have a primary HD1 that has an installed bootable Windows XP partition 1 that is working. And Linux Mint in partition 5 also in primary HD1. I need the Windows XP partition in order to use a very ...
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0answers
20 views

Bootloaders triple windows fedora kali - each bootloader loads it's host OS and windows, not the other linux

I'm having issues with the kernel loading when trying to multiboot. I had previously fixed a similar issue but following a fresh Kali install (and it's attendant automatic reinstall of grub) I've ...
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0answers
49 views

unable to create a bootable USB Debian Stretch disk using LVM with GPT partitions

I'm stuck for several days whith a issue when I try to create a bootable USB disk GPT partitonned. I would like this disk to be like a bootable "backup" disk for my live system. (In fact the system ...