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Questions tagged [efibootmgr]

efibootmgr is a userspace application used to modify the Intel Extensible Firmware Interface (EFI) Boot Manager.

This application can create and destroy boot entries, change the boot order, change the next running boot option, and more.

Details on the EFI Boot Manager are available from the EFI Specification, v1.02 or later, available from: http://developer.intel.com>

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42 questions
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Unable to install Ubuntu on Acer Aspire ES1-533

I bought this computer and wanted to install Ubuntu on it. The problem is that I have been unsuccessful for more than 3 weeks. The computer comes with UEFI of very limited capabilities. It cannot be switched to legacy and there is no option select…
Sladek90
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Mok management will not load on boot

To preface: I'm not looking to disable secure boot as I have a second hard drive with Windows 10 installed. The two OSes exist on two separate drives and are isolated from each other during runtime. Windows Boot Manager and GRUB exist on their own…
Perse95
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I have 2 EFI partitions on 2 separate drives. How do I combine them?

I have a Dell 7567 laptop with 1 SSD and 1 HDD. SSD had windows installed in it. I'll explain step by step the sequence of events I tried installing Ubuntu but installation kept freezing at preparing to install which is the step before partitions I…
Amey Kasar
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efi boot order changes on package upgrade

Every now and then after I upgrade my system the efi boot order is changed and the system won't boot. I have to go to the bios and reselect the ubuntu efi entry. I am guessing it is one of those packages (at least it always happens when I see one of…
R. Bert
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Using efibootmgr to make drive a permanent boot priority without re-ordering the whole boot order

I'm trying to write a script that runs at initramfs that uses efibootmgr to permanently set the highest boot priority without having to re-assign the boot order. efibootmgr -n 000A for example is perfect for this as it sets the drive 000A to be the…
Shiri
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UEFI settings do not persist across reboot

Happy to post more details if necessary/useful. I've tried obvious things (boot-repair etc.). Summary By default, the only way I can currently boot my machine is by inserting the Ubuntu (14.04) stick I created to install a dual-boot system alongside…
Will G
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What is RC or BBS in last column of efibootmgr -v?

xubuntu 20.04 command efibootmgr -v has three columns after the BootOrder: line. The third column has either a boot loader entry or "RC" for CD or USB media. My HP laptop has W10 preinstalled with a recovery partition for W10, and of course I have…
Janos
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grub-install fails because of efibootmgr : Could not prepare Boot variable: Invalid argument : HELP

After a sudo apt upgrade, grub-install failed so I had to reboot on a Live Ubuntu 18.04 USB. After mounting /proc, /dev, /dev/pts, /run, /sys, /sys/firmware/efi/efivars into /mnt/destinationVGDir/ I chroot to my ubuntu on /dev/sda and re-run…
SebMa
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How can I modify the boot loader string of an existing UEFI entry from linux?

How do you modify, e.g., the loader or label attributes of a UEFI boot entry from linux? The man page suggests that the following should work (assuming I want to change bootnum entry 0008): $ sudo efibootmgr -b 0008 -L "wanted-label" $ sudo…
Niclas Börlin
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Ubuntu won't load after dual-boot alongside with Windows 10 and after having set the boot order with efibootmgr

I'll try to be clear. I apologize if this ends up being too long. Firstly, I HAD Ubuntu 19 in dual boot with my W10. I don't use Ubuntu that much, so I had my boot settings set to load Windows straight (that means when I power on my laptop it loads…
FelahBr
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efibootmgr problem, dual-boot, Ubuntu 19.10

I recently purchased a laptop that had no OS's installed. Fine. I installed a fresh Windows 8.1 (the original OS), and Ubuntu 19.10. No problem. However, when it boots, it flashes a very quick message something like: System BootOrder not found.…
heynnema
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"efibootmgr: Could not set variable Boot0000: No such file or directory" and "efibootmgr: Could not prepare boot variable: No such file or directory"

grub-efi-amd64-signed installing for x86_64-efi platform occasionally (~1 out of 20 tests) fails to create the Boot0000 record with the following errors "efibootmgr: Could not set variable Boot0000: No such file or directory" and "efibootmgr: Could…
Simon Fogliato
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Can I permanently stop Windows over-riding my efibootmgr settings after entering BIOS?

I have a dual-boot Windows 10 and Ubuntu HP Laptop. After upgrading to Ubuntu 16.04 I had a lot of little issues and decided to do a clean install. This coincided with wanting to upgrade to 10 and so I followed this guide - How can I dual-boot…
ChopperRated
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Ubuntu 15.04 Secure Boot Problem

I have a system with Ubuntu 15.04 and Windows 10 dual-boot. Everything worked fine with secure boot on. But now it suddenly stopped working and Ubuntu can't boot with secure boot turned on (through shimx64) and just redirects me to windows when I…
Seif Ibrahim
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Bootloader issue - How do I completely remove Linux from my system? fully detailed description

The goal was to successfully install Windows 10 upgrade. System configuration : Dell Inspiron 3537, i5 4th gen processor, 6GB RAM, 1TB HDD, 2GB AMD Graphics. Before install : I have a Dual-boot system with Ubuntu GNOME alongside my genuine…
RGTest
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