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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1answer
15 views

USB boot device no longer detected even after reinstall

I have a desktop PC with dual boot, which had the following setup: SSD EFI System Partition Windows 10 system Debian 10 encrypted root Assorted recovery and backup partitions HDD EFI System ...
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0answers
11 views

Moving empty space behind Ubuntu partition to extend Windows partition

I recently purchased a new SSD for my laptop as I was running out of drive space. There is only space for one SSD in my laptop so I had to clone the entire existing drive to the new SSD and then swap ...
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1answer
2k views

Dual boot Windows 10-Ubuntu - Grub, os-prober not detecting Windows 10 partition

Got my Dell XPS 9560 replaced by warranty after motherboard on previous one went bad. Took out the HDD on the new unit and swapped it out with SSD in previous unit. In the past when swapping out hard ...
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0answers
14 views

Couldn't boot to Pop OS!

I'm new to linux community and wanted to try Pop OS! I followed every instruction exactly as it was listed, but I still couldn't boot to the OS. I was able to install Ubuntu without any problem using ...
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1answer
24 views

edit grub to have multi boot option to have more than 2 OS boot option

How do we edit grub in a UEFI HDD to have multi boot option having more than just one linux one Windows OS, readily being selected and run at PC startup
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1answer
20 views

Custom Ubuntu based iso won't boot if “USB Legacy Emulation” is disabled [closed]

I have a custom Ubuntu based iso which boots fine in Bios mode. It will also boot in UEFI mode if "USB Legacy Emulation" is enabled. With the machine is in UEFI mode and "USB Legacy Emulation" is ...
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2answers
96 views

Why won't USB with custom iso boot UEFI? (Solved)

I'm trying to make a iso, based on Ubuntu 18.04, that boots in both Bios and UEFI mode. I have it booting in Bios mode but having a problem getting it booting in UEFI mode. When I burn it to a USB ...
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1answer
26 views

Booting mfsBSD via PXE with UEFI

I'm trying to boot mfsBSD ISO via PXE on a host with UEFI boot enabled. It was a pretty simple task with BIOS boot, the ipxe config for this task looked like this: kernel --name freebsd http://pxe....
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1answer
2k views

Trying to install dual-boot Parrot OS 3.5 on Sony Vaio UEFI

I'm trying to install Parrot OS 3.5 on a Sony Vaio laptop, as a dual-boot alongside Windows 10. I have no trouble installing from my bootable USB, but Grub doesn't seem to be able to load it. I don't ...
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0answers
24 views

Multi Linux and one Windows bootable in one HDD

How do we have multi Linux and one Windows bootable OS in one UEFI system HDD with the option which one to boot at PC startup?(shown in step by step instructive explanations)?
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1answer
1k views

Create bootable hfs+ partition for macbook

I've installed Debian testing on a Macbook Pro (mid 2014) without keeping OS X on the internal SSD. I've used the following GPT partition layout: HFS+ EFI on /boot/efi BTRFS on / SWAP on swap I've ...
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0answers
31 views

Add UEFI boot capability to a BIOS only Ubuntu 18.04 based custom iso

I am trying to add UEFI boot capability to a BIOS only Ubuntu 18.04 based custom iso. All the methods I've found so far require an efi.img file which isn't present in the iso. Can I use the file out ...
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1answer
45 views

How to modify iso that boots bios only to dual boot mode - no EFI files in iso

I have been asked to modify a custom built iso, based on Ubuntu 18.04. It currently only boots on Bios and has no EFI related files. How do I generate the required files such as efi.img, BOOTx64.efi, ...
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0answers
33 views

EFI partition severely damaged, can't boot to any OS on hard drive

I have installed OpenSUSE Tumbleweed before installing Windows 10 (both installed from a USB stick on UEFI mode). OpenSUSE didn't recognize the new OS and didn't place it in it's own grub menu, and ...
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1answer
186 views

UEFI Stub booting not working

I am trying to boot Arch Linux via an EFI Stub. I created an EFI partition (formatted as FAT32), a swap partition and a main partition on which I installed the Arch Linux core package group. I then ...
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0answers
30 views

Can't Back to default UEFI BIOS

I switched to Legacy mode to install Manjaro on my Thinkpad T480. When I decide to install pure Archlinux with UEFI and GPT partition on my SSD nvme ; I didn't succeed to Back to default UEFI BIOS (...
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0answers
33 views

How to examine contents of EFI partition in an ISO 9660 iso

I've tried converting a BIOS only iso to boot both BIOS and EFI without success. I believe the problem is the way the EFI is being built. How do I examine the EFI partition within the ISO9660 iso? ...
2
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2answers
8k views

Adding Linux to GRUB boot menu in UEFI mode to dual boot with Windows 10

I have a Dell Inspiron 5559. At present it is booting in UEFI mode with inbuilt Windows 10. I need to dual boot between Kali Linux and Windows 10. I followed the many tutorials online but they all ...
2
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0answers
39 views

Dual boot CentOS 7 and CentOS 8 on UEFI machine

I want to build a dual boot environment of CentOS 7 and 8 on a UEFI/GPT machine. But, I encountered a EFI bootloader problem; Both CentOS 7 and 8 installers put their bootloaders in the same place: \...
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1answer
1k views

GRUB fails to install during Debian 10 installer (re: UEFI, SuperMicro motherboard)

I've installed a new motherboard into my server (SuperMicro X9DRi-F) and I'm trying to install a fresh copy of Debian 10. However, when it tries to install GRUB it fails: Unable to install GRUB in ...
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0answers
22 views

How to do partial shutdown into BIOS?

I'm running a dual boot system on my laptop (both are linux distros). It takes ~20 seconds from power-on to the UEFI systemd-boot menu where I can select which OS I want to boot into. Is there a way ...
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2answers
1k views

Zorin OS, can't boot from USB

I recently installed Zorin OS on my Lenovo Yoga 2. I completely got rid of Windows and am not dual booting. I am now trying to get back to Windows 10. I created a Windows 10 USB drive, but I can't ...
2
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1answer
103 views

CentOS 8 not booting: going to dracut resume mode

I am running CentOS 8 as a VMWare Guest OS. I have been using it for some time. Today I rebooted the machine, but it is going to Dracut resuce mode. It is not able to activate the OS LVMs. How can I ...
31
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1answer
43k 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 ...
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0answers
32 views

How to solve “Reboot and select proper Boot device” after install Kali Linux 2019.4 in UEFI mode?

I'm trying to install Kali Linux 2019.4 in single boot on a Toshiba Laptop. First, I create bootable USB by using Rufus 3.8 and select GPT partition scheme for UEFI then select DD mode. I disable ...
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2answers
1k views

System skips grub and loads to Windows (UEFI)

It's the first time that I install Linux (Debian testing) on a computer with UEFI and not BIOS. I've installed Windows first and then Debian (like I always did), but system keeps booting straight into ...
3
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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 ...
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1answer
1k views

GRUB does not load in Windows10+Linux with UEFI

I have a new computer that comes with UEFI but I'm unable to use Windows 10 and Linux in dual boot, after installation of Linux+GRUB and reboot it loads Windows without showing GRUB, notice that first ...
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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2answers
1k views

How to create arbitrary UEFI boot stubs?

I installed TinyCore as my maintenance OS. I gave that GRUB2. But the TinyCore install instructions tell you to add GRUB2 using the MBR method. (It works but that's just because EFI is backward ...
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1answer
4k views

Arch Linux Live USB no longer booting UEFI

My Lenovo laptop is running Arch Linux with a UEFI GPT partition table. One day I powered up my laptop, but couldn't get passed the Lenovo boot screen. I used a USB stick to boot up and reinstall Arch....
3
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0answers
83 views

How do I know if my computer is susceptible to bricking via rm -rf?

I've heard a lot of horror stories of rm -rf / not only deleting the operating system (as expected) but also hard bricking the hardware of the system by deleting important firmware variables, ...
6
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3answers
7k views

How to make UEFI bootable usb disk from bios bootable iso

Suppose you have an iso image that contains a bios bootable partition. You can write this image to a usb disk In linux you could do this for example with dd if=pmagic_2013_02_28.iso of/dev/sdc1 ...
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3answers
146 views

How to convert an Arch Linux system from BIOS to UEFI?

I'm moving my system to a new SSD. And I would like to take this opportunity to convert from BIOS to EFI. Mainboard is about 1 year old, so firmware should be current enough to avoid the UEFI issues ...
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 ...
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3answers
2k views

Mounting efi disk on external USB

Recently I bought new sshd to replace my old one on my notebook, but I have problem. I installed Ubuntu 15.10 on new one and put the old on usb case I have, but the disk on USB doesnt have partition (...
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0answers
19 views

How do you (can you?) boot an installation image from a harddrive partition?

I wanted to make a reinstall of my linux mint, but I only have an SD-card and my current installation (which seems to be a UEFI installation based on the occurence of boot/efi). I tried using the dd ...
0
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1answer
39 views

How do I get Windows entry to my GRUB Bootloader?

The other day I deleted an EFI partition (for arch linux installation stuff) and created a new one. Then I had had numerous attempts to install GRUB on UEFI System using ARCH Linux Live USB, yet I ...
2
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1answer
156 views

On UEFI laptop, Linux Mint has crashed twice

In the last 2 months, I have installed Linux Mint 19.1 on two laptops. On the older of the two, a Samsung Rv511 (ca. 2011) using MBR partitioning, there have been no problems at all. Linux Mint has ...
3
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4answers
4k views

Red Hat 7.4: How to inject kickstart file into USB media for UEFI-only system?

I am trying to build an installation image (to be transferred to USB media) for Red Hat Linux 7.4 with a custom kickstart file, and the corresponding ks= argument added to grub, but and can't figure ...
3
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0answers
22 views

How to replace osx with Linux

I tried searching for this answer but the only one I would was from 2012 and surely things have changed since then. Anyway, I inherented an iMac from my Dad when he upgraded to a MacBook Air. I'd ...
5
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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 ...
0
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1answer
976 views

Wondering how to correctly configure rEFInd for Windows and Arch dualboot

I am currently considering moving to UEFI/GPT on my system. I plan to install Windows first and use the ESP created by Windows. My first major question is this: Will Windows automatically use the GPT ...
0
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1answer
925 views

Dualboot Windows 10 and Fedora 24 with UEFI on HP Desktop

I have an HP Envy 700-109c that I am trying to dualboot with Fedora 24. The computer originally came with Windows 8 (which I down(up?)graded to Win7). I have performed a clean install of Windows 10 ...
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4answers
3k views

grub2 gone every time I boot Windows 10

I installed Windows 7 on an SSD and upgraded it to Windows 10. Then I installed Linux mint 17.2 Cinnamon and had the following partitions: The boot menu was showing Linux Mint and Windows 10 and I ...
1
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3answers
514 views

How to modify an installation ISO and keep it bootable?

I know there have been quite a few similar questions, but they aren't specific enough. I have a Windows 10 x64 installation ISO and I am trying to extract the files make some modifications and then ...
1
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2answers
1k views

Installing 32-bit Linux distribution on 32-bit Architecture with 32-bit UEFI

There's a lot of information on installing 64-bit Linux on 32-bit UEFI. It's a mess even here, but I've seen ways (rEFInd, etc). But this laptop (HP Envy X2) has a 32-bit architecture and exclusively ...
27
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12answers
174k 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 ...
0
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0answers
33 views

Prevent Linux From Creating EFI Bootorder Entry

I currently have Debian installed on my external USB pen drive (SanDisk Ultra Flair 64GB). I take this drive around with me and use it as a portable OS on many different UEFI computers (particularly ...
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 ...