Questions about using grub on EFI/UEFI systems relating to configuring, installing or removing grub from EFI/UEFI partitions.

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165 views

How to reinstall grub-efi-amd64 on 15.10?

I tried to install winusb by a .deb package for wily found con launchpad.com. It didn't install. The software center just sat there "installing" with no progress. After that, I tried to install ...
0
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2answers
54 views

What to do with previous EFI partition during new installation?

I have a laptop which came with Ubuntu 14.04 installed. I want to upgrade it to 15.10. But there is a EFI partition of size 200 MB in it. There are total 4 partitions - EFI Ubuntu This is where I ...
2
votes
1answer
1k views

Accidentally deleted efi partition

So, I really screwed things up... Long story short, I deleted my windows 8.1 efi partition and now cannot boot into windows. Furthermore, I don't even have an efi partition left to create a linux ...
0
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0answers
22 views

Grub efi amd64 signed failed to install into /target/ [duplicate]

I have a Lenovo B50-30 FreeDos, I upgraded my BIOS. I was installing Xubuntu (xubuntu-14.04.3-desktop-amd64), but during the installation, the following message appears: grub-efi-amd64-signed failed ...
0
votes
1answer
74 views

Grub last update (17/11) problem

After the latest Ubuntu, so Grub update, my computer has problems to open immediately Grub for choosing the OS. Appear an error message saying: Failed to open \EFI\Microsoft\Boot\grubx64.efi - Not ...
2
votes
1answer
657 views

Can't boot to my usb to install Ubuntu

Recently I deleted Ubuntu gnome desktop from my new laptop dual booting with windows 8 and also repaired the start up so that it would go to windows automatically. However now I want to install Ubuntu ...
0
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1answer
414 views

Error when installing the grub2 package in /target/

I'm new to Linux and I have only used Windows so far (Currently: windows 8). But for a Bachelor Project at my university, I was advised to use Linux in combination with computations in statistical ...
0
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1answer
145 views

Fresh install boots into grub

Linux newbie here. Just recently reinstalled Ubuntu and every time I boot, I get thrown into the grub shell. I've looked everywhere, wasted a lot of time and can't track the problem for the life of me....
3
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0answers
468 views

Enabling SecureBoot

I want to enable Secure Boot on my asus ux303ln laptop to enhance security. This means I do not want to use "shim" bootloader to be able to dual-boot into Windows, and I do want to have my own ...
0
votes
1answer
111 views

Make a portable Ubuntu on a USB stick (bootable on Windows 8.1)

This is actually quite similar to a question posted one year ago Make a portable Ubuntu on USB stick (bootable on MacBook/iMac). I meet the same problem on my Lenovo ThinkPad X1 Carbon with Windows ...
0
votes
1answer
427 views

Acer Aspire V3 does not recognize my EFI partition

I just installed Kubuntu on an Acer Aspire V3 netbook with a SSD using GPT and the following partition layout: 1 MB unformatted partition with boot_grub flag, 200 MB FAT32 partition with boot flag, ...
0
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0answers
101 views

Does grub need constant access to bootmgfw.efi?

I'm trying to get a new laptop to dual-boot Kali and Win10. Grub, however doesn't see the Windows EFI install. This answer looks like it should work, but I'm wondering, do I need to add the partition ...
0
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1answer
407 views

Changing Default Grub Menu, Not Default OS

My question is in regards to changing my default GRUB bootoader. Not the boot order, font, image, etc. I have successfully triple booted both of my laptops. Their default OS's were both Windows 8.1, ...
1
vote
1answer
681 views

How to make a UEFI compatble ISO with grub-mkrescue?

I have been following this guide to produce a customized version of Ubuntu. As of now, the structure of the CD is complete. I just have to generate a bootable ISO image with the command: sudo ...
0
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0answers
124 views

How to get EFI for 32 bit instalation

I have a tablet with intel atom cpu and can't boot 32 bit ISO image in it. I heard that developers don't want to develop this but I wonder what is the challenge on doing so. I tried disabling secure ...
1
vote
1answer
58 views

“Fixing Grub” in single boot installation process

I installed Ubuntu 14.04.02 on my 2011 Macbook Pro following the instructions at this page. After the installation completed, the impulse to play with my new toy rushed over me and I took a little ...
-1
votes
1answer
436 views

“GRUB installation failed” What do I do?

I'm trying to install Ubuntu Studio version 14.04.2 (alongside my Windows 8). Everything seems to go fine during the installation until at some point this message pops up: GRUB installation failed ...
2
votes
3answers
2k views

error symbol 'grub_term_highlight_color' not found

My dual boot Ubuntu/Windows installation on a Samsung Series 7 laptop is suddenly broken, I do not know why. I have not made an update, and the laptop was not even connected to the internet when it ...
0
votes
1answer
175 views

Problem in booting from new installation of Ubuntu 14.04 to a new ssd Hard disk

I try a lot of times to install Ubuntu 14.04 toy a new disk in my desktop. But grub never worked. After reboot always goes to rescue grub command line with the message can “open” the disk see image 1. ...
0
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2answers
1k views

Standalone Grub2 EFI installation - grub.cfg placement?

I'm trying to use Grub2 as the boot manager on an EFI system in standalone mode. (The only persistent harddisk has OS X on it; Linux and Windows drives may or may not be present at times, hence the ...
1
vote
2answers
378 views

What should I do as apt-get wants to remove grub-efi-amd64-signed

I'm on 15.04 and latest upgrade shows grub-efi-amd64-signed as "to be removed" (along with upgrading grub-common, grub-efi-amd64, grub-efi-amd64-bin and grub2-common) I'm using EFI secure boot, so I ...
1
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0answers
135 views

windows 8.1 won't let me boot using Ubuntu

I have a Lenovo laptop that came pre-installed with Windows 8. I have tried both desktop versions of Ubuntu, and I get the same result. Upon restarting mt laptop I get a start screen called 'windows ...
2
votes
2answers
66 views

How do I install for a Mac while the Mac's hard drive is in a PC?

Host = HP Pavilion i7 q 820 Target = Macbook Pro 6,2 Basically I have the drive partitioned for swap and boot, with the ISO already copied to the drive, how can I install grub for that target from ...
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2answers
34 views

Should grub be removed before reinstalling Ubuntu?

I once installed Ubuntu alongside Windows 8. I then removed Ubuntu by formatting the partition. Ubuntu was gone but the grub remained. Should I remove grub before installing Ubuntu again?
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2answers
609 views

rEFInd showing 3 ubuntu .efi instead of 2

This is not really a problem, though I am just curious to why do I suddenly see 3 ubuntu, instead of the usual 2. It should be grub64.efi and shim64.efi. Though now it is grub64.efi, vm-linuz-3.13.0....
1
vote
1answer
117 views

Problems with refind on MBP

I'm running ubuntu on my late 2013 MBPr and dumb decisions have me in a pickle. A while ago I had a triple boot system, but problems with OSX made me more reliant on Ubuntu, and recently I've been ...
5
votes
2answers
565 views

How do I install two independent Ubuntu installations on a single hard drive with UEFI?

For security reasons I would like to install a secondary completely independent operating system on a single-hard-drive computer using UEFI. Both installations should be able using different LUKS ...
0
votes
1answer
27 views

Magnetic Link of 64bits are incorect? [closed]

Recently I download for one of your torrents download option a 64bits copy of Ubuntu 14.04.2: magnet:?xt=urn:btih:KRWPCX3SJUM4IMM4YF5RPHL6ANPYTQPU&dn=ubuntu-14.04.2-desktop-amd64.iso&tr=http%...
1
vote
2answers
542 views

Issues dual booting Ubuntu 14.04 and Windows 8 on Lenovo z50-70

I've attempted unsuccessfully several times to install Ubuntu alongside Windows on my new laptop. Initially Ubuntu 14.04 did install, but I was unable to boot it, after trying various things. I ...
2
votes
2answers
275 views

Grub loader always takes 10 seconds

The default grub loader is always runing 10 second countdown before launching Ubuntu 14.04. This is how it looks in etc/default/grub: GRUB_DEFAULT=0 #GRUB_HIDDEN_TIMEOUT=0 GRUB_HIDDEN_TIMEOUT_QUIET=...
0
votes
1answer
129 views

Dualboot Windows 8.1/Ubuntu 14.04 No Windows Bootloader on grub2

So, I had Windows 8.1 and Ubuntu running fine on my laptop until Ubuntu updated to 14.10, after that Ubuntu could not load, just a Purple Screen and a Blinking CapsLock Key, so I booted into Windows ...
0
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1answer
88 views

Visualizing linux GPT partition (EFI) from Windows Host

I created a rescue grub.iso using the following script. This code worked for me when I using Windows 7, Ubuntu 12, MBR: #!/bin/sh set -e wk_dir=$(mktemp -d "${TMPDIR:-/tmp}/tmp.XXXXXXXXXX") mkdir -p ...
0
votes
1answer
58 views

Boot in UEFI mode

I have ubuntu 14.10 installed on a pendrive in legacy mode. I can use it to boot my desktop and tablet in legacy mode, but not UEFI. Is there any way to make it bootable in UEFI mode? For example, ...
0
votes
2answers
542 views

Install Ubuntu on UEFI without Windows or Boot Loader

I have a Gateway netbook that has already been fully wiped with nothing on the hard drive. There is no Legacy option in bios and the only thing I can boot from the USB is a Gparted disk utilizing Grub/...
0
votes
2answers
110 views

GRUB not showing on cold boot but on warm boot

I have a dual boot between Windows 8 + Ubuntu 14.04 (UEFI), but what is happening now is I am booted directly to windows when I first start my computer or restart from Ubuntu. I can see my grub only ...
0
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1answer
379 views

grub.efi doesn't boot but shim.efi does

I have dual boot(Ubuntu 14.10 with windows8.1) I had got grub rescue>unknown file system and I used boot-repair to solve it. I removed the grub files and boot-repair gave some codes that I ran on ...
2
votes
0answers
399 views

Lenovo onekey stuck in GRUB

I have a Lenovo g50-45 with onekey recovery with Windows 8.1 pre-installed. I dual booted with Ubuntu. Then I uninstalled Ubuntu. then tried to reinstall with USB using onekey. I got this screen: ...
0
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1answer
55 views

Booting ubuntu directly [duplicate]

I have installed Ubuntu alongside windows but the problem is I am unable to get the dual boot screen where we have the windows boot loader listed, instead of that the computer directly boots into ...
1
vote
1answer
549 views

Dist-upgrade in Ubuntu 14.10 tries to remove grub-efi-amd64

A recent security (?) update in 14.10 Utopic Unicorn caused "apt-get dist-upgrade" in Ubuntu 14.10 to try to remove package "grub-efi-amd64", and replace it with package "grub-pc". I use grub-efi to ...
1
vote
1answer
156 views

How to boot Ubuntu after removing Windows on UEFI system

After previously dualbooting Ubuntu 14.04 lts with Windows 8.1, I finally bid my farewells to windows and wanted to make a complete switch to linux. I decided to upgrade to Ubuntu 14.10 as there frame ...
1
vote
1answer
722 views

Restore /boot/efi

Recently I apparently corrupted my /boot/efi partition, I got according error messages at boot and a manual console to remount it. I tried to reformat it (mkfs.vfat 32), reinstalled grub (grub-...
0
votes
3answers
73 views

How do I update Ubuntu in a UEFI-based Windows 8 dual boot

I got Windows 8 and Ubuntu 14.04 dual booted on my system, and I want to update Ubuntu in the future (not now). How do I do it on UEFI hardware? I got a Gateway SX2110G-UW318 PC. Help? :\
1
vote
2answers
1k views

Mac Mini late 2012 14.10 Server won't boot after install

I have installed (and reinstalled multiple times) Ubuntu Server 14.10 on a Mac Mini 6,2 (late 2012). The install media is a USB drive. The computer is connected to the internet through ethernet cable....
0
votes
1answer
766 views

GRUB Bootloader not loading with Software RAID1 on Fresh 14.04 Server Install

I've looked at all of the forums, and tried doing multiple fresh installs and continue getting the error "Unable to install GRUB in /dev/mdx - This is a fatal error" My current setup is 2 2T drives, ...
3
votes
0answers
2k views

how to enable secure boot after the installation

Kubuntu 14.04 64bit on a MS-DOS (MBR) type HDD (sda4) Kubuntu 14.10 64bit on a GPT type HDD (sdb5) Windows 8.1 64bit on a GPT type HDD (sda3) these are my installed OSes, both kubuntu installations ...
0
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1answer
84 views

Ubuntu not Booting ,GRUB screen not disappearing

while installing Ubuntu, I choose the first option(erase disk and install Ubuntu). After the installation is complete I reboot my machine and what I got is a purple screen (I think the purple color is ...
0
votes
3answers
110 views

problem with boot, grub-repair not help

Hello i want install ubunntu 14.10 (64biit) i already have orginal windows 8.1. I turn off secureboot in bios, and fastboot in windows. Installation ubuntu is no problem but i don't see grub after ...
1
vote
1answer
1k views

How to make update-grub recognize zfs datasets as root in /etc/fstab and add minimal set of zfs options?

I'm having trouble to find out how to make update-grub of grub-efi 2.02~beta2-9ubuntu1 recognize the specification of a ZFS dataset as root device in /etc/fstab and conditionally add a minimal set of ...
1
vote
2answers
276 views

Two copies of Ubuntu loader detected by Boot Manager

I have Windows 8 and Ubuntu on my system. I recently upgraded from Ubuntu 13.04 to 14.04, and ran Boot Repair in order to make the GRUB the default loader. However, it failed to achieve what I wanted, ...
0
votes
1answer
414 views

Cannot repair grub using, boot-repair fails without reason

It just shows that error happened and gives link for log: http://paste.ubuntu.com/8585646/ Tried to disable/enable WinEFI backup, putting boot in Legacy and UEFI mode. In UEFI mode not worked at all ...