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

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1answer
449 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
113 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
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1answer
46 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
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1answer
339 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 ...
0
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1answer
159 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. ...
1
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2answers
321 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 ...
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
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1answer
101 views

How to boot Ubuntu automatically?

I am using Ubuntu GNOME 13.10. I have made one backup image with Clonezilla. The backup includes 2 partitions — one is /dev/sda1, where is the EFI (only the EFI folder from /boot/efi/EFI), and the ...
2
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0answers
367 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: ...
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0answers
122 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
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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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3answers
21k views

How to install Ubuntu server with UEFI and RAID1 + LVM

I used to install my servers with LVM over software RAID1, and grub install on the MBR of both drives. Now I have an UEFI server, and the compatibility (BIOS) mode does not seem to work. So I went ...
1
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1answer
228 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, ...
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2answers
33 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?
1
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2answers
552 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, ...
1
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1answer
106 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 ...
0
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1answer
26 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: ...
2
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2answers
249 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 ...
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4answers
29k views

Uninstalling GRUB from UEFI laptop

I installed Ubuntu alongside Windows 8, however have decided to unisntall Ubuntu. First I booted into Parted Magic and, using GParted deleted all the ext4 and swap partitions. This leaves me with ...
0
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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 ...
3
votes
1answer
7k views

Can I install in UEFI mode with the alternate installer?

I'm wondering if it's possible to install Ubuntu 11.04 UEFI mode with the alternate installer. I've read that only grub-efi is needed to boot in UEFI mode. How do I install that?
0
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1answer
87 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
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1answer
56 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
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2answers
95 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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2answers
490 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 ...
0
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1answer
337 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
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2answers
6k views

How to install ubuntu 14.04 on my Mac Pro 1,1 with a raw hard drive by a bootable USB stick

I have a Mac Pro 1,1 and I replaced the original hard drive with a new 3TB hard drive (just got, never initialized). I try to install ubuntu by a bootable USB stick which I crated on my Mac When I ...
1
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1answer
569 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 ...
1
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1answer
524 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 ...
0
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1answer
52 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
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1answer
135 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 ...
0
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1answer
959 views

Problem understanding a grub.cfg line with search.fs_uuid

while learing and adjusting my boot setup, I am stuck unterstanding this content in my grub.cfg on the EFI patition of my drive: search.fs_uuid <uuid> root hd8,gpt5 set ...
0
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1answer
741 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, ...
0
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3answers
72 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
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2answers
960 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 ...
1
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1answer
890 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 ...
3
votes
0answers
1k 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 ...
2
votes
3answers
2k views

Grub-Efi wrong resolution

My question, as it comes from the title, related to grub, but it's a different thing. I re-installed Windows 7 and Ubuntu 12.10 in UEFI mode (before that I was using normal BIOS) and everything went ...
0
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1answer
83 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
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3answers
107 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 ...
0
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1answer
388 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 ...
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2answers
271 views

after installing second distro, seperate grub2 installs

I was googling a lot, but couldn't really find any solution. I installed Kubuntu 14.04 (sda2) with seperate home partition (sda4) in EFI mode. Then I decided to install a second distro (Ubuntu Studio ...
0
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1answer
202 views

Stuck on GRUB repair in Ubuntu 13.10 Windows 8.1 dual boot [closed]

I am trying Ubuntu 13.10 Windows 8.1 dual boot. I'm done installing Ubuntu but stuck on boot repair. On booting from the boot repair disk, it shows two options in the boot menu: 1.EFI Device which is ...
1
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1answer
2k views

Boot-repair error on dual boot system with Ubuntu 14.04 and Windows 7

I have a laptop with both Windows 7 and Ubuntu 14.04 installed. Both OS were installed on UEFI mode and are 64 bits. Ubuntu 14 was installed using the upgrade option from Ubuntu 13.10. After the ...
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2answers
2k views

How Can I Get GRUB to Work After Restoring Deleted EFI Partition?

First time posting here for help. So Friday night I was playing around with GParted and accidentally deleted several partitions. One of the was an unnamed. After doing this, I restarted and I was ...
0
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1answer
2k views

Will BIOS boot mode Ubuntu install be able to boot when firmware “Fast Boot” is “Ultra Fast”?

I have an AsRock mainboard with UEFI BIOS P1.50 02/14/2014. The firmware "Fast Boot" option is set to "Fast", Boot Option #1 is set to "AHCI P4: OCZ-VERT...": this is BIOS not UEFI boot. This boot ...
0
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1answer
137 views

New bootloader for Ubuntu? [closed]

Challenging it is to get Ubuntu to boot right with single Ubuntu install since the introduction of (U)EFI BIOS. I have had, and am having difficulties getting a new PC boot to from an SSD disk. It ...
2
votes
1answer
1k views

How to change grub-bios to grub-efi

So a while ago I installed Ubuntu on my MacBook. I had to reinstall it because something in the update manager messed up. Not to concerned about that but for some reason after the installation Ubuntu ...
1
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0answers
350 views

live-build / lb config help needed

Hi I'm trying to build custom iso for my asus t100ta wich is uefi only My goal is to make it bootable grub-efi 32bit My question is how do I specify mainline kernel=>(3.16) and grub-efi bootable? ...
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1answer
3k views

Can not boot Windows on Legacy BIOS after installing Ubuntu on UEFI [duplicate]

Long story short, I installed ubuntu while I was watching netflix and feeling very lazy, and may have lost all my windows 7 files. Quick summary: -Windows 7 was installed on Legacy bios and I ...