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

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1answer
3k views

How to reinstall Ubuntu over Elementary OS on an EFI system?

First, a bit of background. I managed to dual boot Ubuntu 13.04 with Windows 8(preinstalled). I disabled secure boot. I had to go in the bios settings and change the disk order to select Ubuntu as the ...
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
vote
1answer
56 views

Dual-Boot Problem with Pre-Installed Windows 8.1 & Ubuntu 14.04

I do understand similar questions already exist. Yet mine seems to be a problem that despite trying hard to address, I haven't been able to solve. Despite having a working Ubuntu LTs 14.04 ...
1
vote
1answer
37 views

How would I go about dual booting KALI with UBUNTU

I have a USB drive with 8GB plugged into my port for about 3 hours trying to figure out how I go about dual booting Kali onto my Ubuntu. Yes, that is crazy. using ubuntu 14.04 LTS as current OS ...
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1answer
1k 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 prefix=($root)'/boot/...
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1answer
2k views

grub rescue, blind mode

i updated osx last night and when i try to boot to linux, i get sent to the grub rescue prompt. i have performed the following steps: set prefix=(hd1,gpt5)/boot/grub (contains grub.cfg but mod ...
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1answer
1k views

Unable to boot to Ubuntu

Just got a new laptop and removed Windows 8 and installed 13.10 using LiveUSB. Initially it was booting to "No boot media" but I was able to resolve it with boot-repair. I realized some of the items I ...
1
vote
1answer
624 views

Getting ubuntu 12.10 and windows 8 to work correctly dualboot. Configuring GRUB

There may be several questions on similar lines. But this one is a bit different. My Windows8 installation had stopped working earlier after installing Ubuntu 12.10, (standard : cannot find drivemap ...
0
votes
1answer
42 views

Ubuntu16.04 suddenly boots to a text-only (initramfs) prompt, restoring superblock doesn't fix it

So I thought I had faced the typical problem of getting a superblock corrupted (which I think happened because of an intended hard/unclean reboot). However after following the guide in the first ...
0
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1answer
32 views

Recovery Windows boot entry

so I had Windows 10 in my laptop. I decided to install Ubuntu having a dual-boot system. For some reason I thought it would solve some issues I was having (not relevant for this case) if I formated ...
0
votes
1answer
141 views

Can't boot Windows 7 from USB, GRUB still there

I need to install Win 7 on a computer that previously had Ubuntu 14.04 installed. I created a bootable USB with the Windows 7 ISO on it, but I can't boot from it. From the BIOS/UEFI (not sure) I ...
0
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1answer
76 views

linux mac single boot efi question

Linux noobie here.. i have a couple of things going..i have successfully loaded linux on my 2010 mbp. using this process:http://heeris.id.au/2014/ubuntu-plus-mac-pure-efi-boot/ it went very smooth. ...
0
votes
1answer
415 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
votes
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....
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
408 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, ...
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votes
0answers
1k views

black tty screens

I get black tty screens when I hit Ctrl-Alt-F1. I already read all other similar questions but I can't seem to find a suitable solution. Here is my setup. I have a fairly new laptop (Jan 2013, Asus ...
3
votes
0answers
98 views

How do I fix a black screen at login in Ubuntu 14.04?

Description of the problem I am installing Ubuntu 14.04 LTS from a UEFI USB flash drive. When I boot from the flash drive, I get the installer menu e.g. "Try ubuntu without installing" etc. It gets ...
3
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0answers
471 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 ...
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 ...
2
votes
0answers
400 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
53 views

Installed Xenial on Mac Mini mid-2011. No options in EFI boot menu

The install went well. I've had to download b43updated.zip with firmware for the wireless network card, otherwise it's fine except for one other issue: Ubuntu boots Alt during boot doesn't show ...
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0answers
119 views

Installing in encrypted partition under EFI boot

I've been googleing for a bit and can not find an answer yet Im from a FreeBSD background, so you will have to forgive me a little I am trying to dual boot FreeBSD and Ubuntu I want to set up a ...
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0answers
26 views

GPT, grub and mdadm. sda drive replaced, raid rebuilt in recovery mode, but now server won't boot

This is how partition table loooks like: (parted) print Model: ATA TOSHIBA DT01ACA2 (scsi) Disk /dev/sda: 2000GB Sector size (logical/...
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0answers
143 views

Can't boot into Ubuntu 15.10 without 'idle

I'm using Ubuntu 15.10(EFI 64bit) on MSI GS40 laptop, which has Intel Skylake processor and Nvidia's dedicated GPU. I couldn't boot to Ubuntu's installation stage without giving GRUB's boot option '...
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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 ...
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0answers
373 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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0answers
6k views

Make a portable Ubuntu on a USB stick (bootable on Macbook/iMac)

I have a Macbook Pro 8,1 (early 2011 model). My goal is to have Ubuntu installed onto a USB stick what I can plug into any Macbook / iMac (also potentially any pc) and use Ubuntu anywhere. Here is ...
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0answers
2k views

Dual boot windows 8 and ubuntu 12.04 irst, ubuntu not booting (black screen)

I'm trying to dual boot Windows 8 and Ubuntu 12.04 on amy new Asus Zenbook U500VZ with 2x 128 GB ssd in raid0 using Intel Rapid Storage Technology (Windows preloaded). After a bit of trial and error ...
0
votes
0answers
18 views

Set Grub's default boot device across multiple machines

I have a USB mass storage device I use as an Ubuntu live-usb. I use Grub as the bootloader on that device. I am trying to configure Grub to boot the machine's internal drive's OS if a timeout is ...
0
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0answers
17 views

I can boot Ubuntu only once after install

I have just reinstalled Ubuntu 16.04, and have this weird problem where I can boot Ubuntu after the installation, but I get directed straight to BIOS upon restart. I am using UEFI and have the efi ...
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0answers
28 views

Boot Ubuntu from external drive.

I have been trying for a week to install (not live cd) linux Ubuntu on an external drive. Please help me, i've been searching the Internet for days. Before i ask my question, I am totally new to ...
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0answers
30 views

Grub not installing in uefi mode

I have windows 10 installed and i want to dual boot ubuntu with it. I have the bios in uefi mode and my ubuntu live usb is in uefi mode and i know because i get the black grub looking menu instead of ...
0
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0answers
25 views

Installing Ubuntu on a toshiba satellite L10-B?

So i've been attempting on and off for about a year now to install Ubuntu 14.04 on my Toshiba Satellite L10-B. It came Preinstalled with Windows 8.1 and a super locked-down UEFI BIOS. The furthest i'...
0
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0answers
64 views

dual boot problem with ubuntu 16 and windows boot manager in uefi

I installed ubuntu in my dell inspiron 3521 laptop upgraded to windows 10 and uefi mode. While installing it detected windows as windows boot manager.. Installation was easy ubuntu is fine.. The ...
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0answers
16 views

Linux Boot error

I am having trouble booting into my linux laptop. When I press the power button, the screen starts up and an endless stream of [[20~[[20~[[20~........ Appears on screen. Also, the Ubuntu logo keeps ...
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0answers
31 views

Discussion/Needing Help (Acer Aspire ES1-512-P0SY)

As said in the title, I want to discuss of why Linux (here more specifically Ubuntu) sometimes will not work. Here's my situation: I currently have an Acer Aspire ES1-512-P0SY and I feel like this ...
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0answers
45 views

Sometimes Ubuntu stuck on Grub command line on startup

I have Ubuntu 16.04 and dualboot with Windows 10. Sometimes startup stucks on Grub command line. I just do "exit" and grub menu appears and everything is fine. What can be the problem? How to solve it?...
0
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0answers
84 views

Add grub menu for OS X

I installed Ubuntu 16.04 Desktop on my MacBook Pro, and cannot boot OS X now. My disk partition table is: Device Start End Sectors Size Type /dev/sda1 40 409639 409600 ...
0
votes
0answers
34 views

Bootable device not working

I have HP-15-du005tu, downloaded the latest version of Ubuntu i.e 16.04 and using rufus. I've made a bootable device but whenever I restart using advanced mode (win 8.1) it always says bootable device ...
0
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0answers
80 views

Dual Boot Ubuntu & Kali Linux

I have the following problem: I have a USB Flash drive on which I have 4 partitions. The first, a windows accessible fat32 partition, the a second partition on which I have Kali Linux, on the third ...
0
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0answers
28 views

Can someone help with the boot report?

I'm having problems booting Ubuntu on my Toshiba Satelite laptop. Before I had Windows 10 and never had problems with boot. I ran the USB-Live with Ubuntu, installed Ubuntu but now can't boot from my ...
0
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0answers
213 views

No option to Install Ubuntu 15.10 alongside Windows 10

I am having a problem with installing Ubuntu alongside Windows 10. I do have a basic disk, so that is not the problem. I also booted into the installer from a USB in Windows Advanced Startup. Before ...
0
votes
0answers
165 views

Can't boot form USB in UEFI

I have an HP envy dv6 Notebook (windows 10) and I can't load from my usb. The usb works, I tried on others computers, I already changed the boot order. I tried in both ways, efi and legacy, but the ...
0
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0answers
114 views

Cisco UCS and Ubuntu

I'm attempting to install Ubuntu 14.04 iso found here http://www.ubuntu.com/certification/hardware/201512-20310/ onto a couple Cisco UCS C220 M4 chassis. The installation happens flawlessly and ...
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0answers
158 views

How to recover ubuntu after converting MBR to GPT?

I have converted disk partition table from MBR to GPT using disk AOMEI Partition Assistant Professional Edition from Windows in consequence I lost grub and therefore Ubuntu from booting though Windows ...
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0answers
95 views

how to move/create efi and grub to second drive (boot-repair)?

I used to have a Windows 8 / Ubuntu dualboot with Windows installed on a ssd and Ubuntu installed on a hdd - the efi partiton lies on the ssd. Now i want to use the ssd otherwise and just want to use ...
0
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0answers
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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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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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 ...