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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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2k 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 ...
4
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0answers
34 views

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 ...
4
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0answers
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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0answers
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. ...
4
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0answers
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/...
3
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0answers
151 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
126 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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0answers
863 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. ...
3
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0answers
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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0answers
578 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 ...
2
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0answers
41 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
68 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 ...
2
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0answers
71 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/...
2
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0answers
429 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
199 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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0answers
371 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 ...
2
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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 ...
2
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0answers
228 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
310 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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0answers
436 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 ...
2
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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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0answers
206 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
votes
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
163 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
210 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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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
votes
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
635 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 ...
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vote
0answers
47 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 ...
1
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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
47 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 ...
1
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0answers
73 views

Creating an ISO that a macbook can boot from

Trying to repack an ISO with a preseed file to automate installation. I have done this with a dozen laptops and works great. Until I ran into a macbook, where it does not work. Originally repacking ...
1
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0answers
242 views

GRUB Change EFI to BIOS legacy boot mode

I need to change the boot mode of an UNIX system from EFI to BIOS. This system (Fedora Atomic Host) uses GRUB as a default bootloader. I need to change the bootloader to BIOS, because I want to ...
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0answers
856 views

Solus OS broken boot

I had a perfectly fine and running Solus OS installation on a 100gb of 1tb hard drive. When I created a partition on the remaining 900gb, boot just vanished. I tried all the things from the internet, ...
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0answers
447 views

How can I get Linux fully installed and operational on 32 bit U/EFI & 64 bit Atom (baytrail) tablet?

How can I get Linux fully installed and operational on a 2 in 1 Trio Windows 10.1 OD Tablet? ( http://www.triotablets.us/tablets/windows-tablets/pro-book-10-1/ ) It utilizes a 32 bit U/EFI and a ...
1
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0answers
62 views

Dual boot - Installed second OS - can't see the original

I am trying to dual boot Ubuntu/Arch linux. I originally had just Ubuntu on my PC. I then made another partition to install Arch on and followed the Arch wiki and also this resource. After following ...
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vote
0answers
69 views

Cannot find UEFI secure boot option

I have a Lenovo Ideapad y510p. I have been trying to install CUDA for GPU computing, but I've been unsuccessful so far. One common instruction is to disable the UEFI secure boot. The option simply ...
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0answers
889 views

GRUB2 shows “trying to terminate EFI services again”

A few days ago my ubuntu 17.04 software updater on a dual boot system with windows 10 ran some automatic updates and prompted a reboot. Ever since, after I select my boot option in GRUB there's a ...
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0answers
457 views

Reinstall Ubuntu in UEFI mode alongside Manjaro

I initially had Manjaro installed in UEFI mode. I then used a Ubuntu live USB to install Ubuntu on a new separate partition. I choose the default options and it seems that it has not installed it in ...
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0answers
342 views

How can I find the source of this unreadable hd0 in grub2?

On boot of a new ThinkServer with CentOS 7 installed after selecting one of the boot menu options in grub (or at the grub command shell if I search or ls), I can see error: failure reading sector 0x0 ...
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0answers
326 views

efibootmgr: what if I remove all the non-manual entries?

$ efibootmgr -v BootCurrent: 0001 Timeout: 0 seconds BootOrder: 0001,0002,2001,2002,2003 Boot0001* Arch Linux HD(1,GPT,bebb1ca0-2911-46cd-b95d-8c7576d50371,0x800,0xf3800)/File(\EFI\arch\vmlinuz-...
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0answers
109 views

how to make efi script that launches linux kernel?

I'm trying to set up a simple efistub on my fresh arch linux system with simple editing of kernel parameters. Current process: there is an EFI boot option created by efistub that launches /EFI/arch/...
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0answers
444 views

How to boot a .efi file using QEMU?

Well, thats all, how can I boot a .efi file in QEMU? I'm almost new to this EFI world and I dont know how to start, should I make an iso, what would be the internal structure of that iso? Thanks in ...
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0answers
372 views

System not booting after exhausting battery under “All UEFI” ROM launch policy

I've got an HP EliteBook Folio with Windows 10. It never launched Windows, because I replaced it with Lubuntu 16.04 right away, and it performed nicely. Then it was inactive for some months, consuming ...
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0answers
83 views

Arch Windows dualboot: fdisk only lists liveusb?

I'm trying to dual boot windows 10 (secureboot disabled, uefi enabled) with arch. I used the disk management utility in windows to set aside some space for linux, but when I boot the liveusb and run ...
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0answers
534 views

Where to take grubx64.efi file?

I suspect, that if I put this file into my EFI partition into /EFI/ubuntu/grubx64.efi, I will be able to add entry for this file and it will be seen by bios and my non-bootable Linux partition will ...
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0answers
358 views

grub: boot system on non-GPT disk while in UEFI mode

I have two drives on my system: /dev/sda has a GPT and an EFI partition. It has Debian 9 and Windows 8.1 installed on it. Debian controls the MBR using grub (grub2?). /dev/sdc has an msdos partition ...
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0answers
228 views

Arch Linux won't boot in MacBook Air in UEFI mode

I am trying to install Arch Linux (any Arch based distro) on my MacBook Air 2011 in UEFI mode but the bootable USB drive just won't boot. When I restart and press the Alt key I get an option for EFI ...