GRUB2 is the next generation of the GRand Unified Bootloader (GRUB). Ubuntu has used GRUB2 as the boot loader since 9.10 (Karmic Koala). Commonly referred to as simply "GRUB".

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Ubuntu 14.04.3 Installation Broke Windows 10 Boot

I installed Windows 10 Educational edition today on the first of three partitions on a Toshiba Satellite and then proceeded to install Ubuntu 14.04.3 to the second of the 3 partitions. Ubuntu will ...
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accessing GRUB after getting black screen after installation

I'm installing Ubuntu 14.04 LTS on an old macbook pro (2007, version 3.1, Core 2 Duo with nvidia graphics card Geforce 8600 M GT). For the live-version to work, I had to add nomodeset to the ...
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1answer
23 views

Configuration for green tty's foreground and boot text after grub menu

I have set up my system (Ubuntu 14.10) for a text boot up. I need to configure my ttys and boot in such a way that it shows green font for boot messages and ttys.Right now, after the grub menu(which ...
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4 views

How to add CD/DVD to boot sequence

I have a macbook pro that dual boots Ubuntu and OS X. When I enter grub on ubuntu with a bootable CD inserted, I don't get an option to load from the CD drive. How can I allow Ubuntu to start to boot ...
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2answers
529 views

Multiple Windows options in Grub Menu

My system has 2 OS: Win 7 x64 and Ubuntu 12.10. I'm getting 2 Windows boot options: "on dev/sda1" and "on dev/sda2". What does this mean? What implications does this have for my continued Windows ...
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17 views

Cannot Install/Boot Ubuntu

So this is my first experience/attempt with Linux. I have been trying to install Ubuntu v14.04 on an old MacBook Pro 17" 2.4GHz Intel Core 2 Duo. Each time I try to Live-Boot from the USB, I get an ...
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24 views

how to remove the only OS ubuntu14, install win8.1

dual win8.1 and ubuntu 14 used well, then I delete the ubuntu partition on disk managerment of win8.1. reboot it. then appears grub and can't enter BIOS, maybe is related to uefi. I accidently choose ...
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1answer
3k views

Burg + UEFI + Win 8 multiboot

Intro: After some trail and error I've managed to install Ubuntu 12.04 64bit on my Win 8 preinstalled Lenovo Ideapad Y500. So far I've had two problems: Grub detected the windows 8 install as a ...
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1answer
16 views

stuck in GNU grub with no OS

Linux novice here however I've been playing around with Ubuntu and ultimately came into a bug in 15.04 and wanted to revert back. I decided to install os-uninstaller to completely wipe ubuntu OS off ...
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2answers
6k views

How do I open the boot menu?

I want to uninstall 12.04 and install Ubuntu 13.04 instead. When I was installing Ubuntu 12.04 from Windows 7 opened the boot menu F12. I have read that on Ubuntu to enter the boot menu I have to ...
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1answer
29 views

After upgrading GRUB, cannot boot Windows from rEFInd

I'm triple booting Ubuntu, Windows 7, and Mountain Lion from a single hdd in my Macbook Pro 5,3. Somehow, when I got everything set up, I had two options to boot Windows from rEFInd: one that read ...
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12 views

Unable to install Grub2 on any drive

Installing Ubuntu-Mate Desktop Amd64 15.04 (same problem with Ubuntu Desktop Amd64 14.10) for the first time, on Dell Studio XPS. Only let me choose an external (USB) hard drive; install partitioned ...
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1answer
21 views

Two windows entries in the GRUB list

everyone. I am not new to ubuntu environment but I use it as a secondary os. Recently, I had to reinstall ubuntu as dual partition to my windows. When I try to customize my grub order, I noticed two ...
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24 views

Ubuntu 14.04 Grub [duplicate]

I want to modify /etc/default/grub to make the default timeout 0 then run sudo update-grub or sudo grub-mkconfig -o /boot/grub/grub.cfg Neither does the job any ideas?
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13 views

Reinstall GRUB to partition?

Recently my BCD corrupted, so I reinitialised it from a LiveUSB, and added my Ubuntu partition back to it. Unfortunately the kernel isn't loading, so I thought to reinstall GRUB. The results below ...
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2answers
1k views

I cannot re-install Ubuntu 15.04 alongside windows 8.1

This question may seem repeated but I have other more issues. I installed 8.1 in my dell 5537 and dual booted it with ubuntu 14.04..I worked well..I installed with alongside windows option..It took ...
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1answer
3k views

ubuntu 14.04 Grub Rescue error

So I installed linux (ubuntu) yesterday on a fresh hdd with a disk. It worked fine till today when it froze after I had had it in sleep mode and I had to turn it off and on again to be greeted with a ...
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2answers
8 views

How can I install Ubuntu onto a software RAID 10 array?

I'm planning to set up a low-traffic server using RAID 10 with four disks. I'd like to have Ubuntu 14.04 installed onto that RAID array. I've seen plenty of guides explaining how to set up RAID 10 ...
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12 views

Installing ubuntu 15.04 the install freezes at installing grub2

I was using 14.04 and tried upgrading to 14.10 and during the install it freezes when installing grub2. So I reinstalled 14.04 and tried again and same problem. I downloaded the 15.04 and tried a ...
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9 views

Newly installed system won't boot, how to disable k10temp from GRUB2?

I just installed Ubuntu GNOME (via the minimal install, as no other Live CDs would boot) on a desktop computer which has an AMD Triple-code Phenom 8450 processor. The issue is, that after one reboot ...
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9 views

Location of grub on gpt partition

As far as i undersood the grub program is located fully in the efi partition if i have gpt partition scheme instead just as a link like it was in the older mbr. So now if i remove linux partition will ...
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1answer
102 views

'Upgraded' to Windows 10 on dual boot, and can't boot to Ubuntu partition

I recently updated my windows 7 to 10, and destroyed grub in the process. I ran Boot-Repair on a live CD and managed to get the Windows Partition back. However grub still doesn't come up for me. The ...
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2answers
55k views

Why this occurs error: Diskfilter writes are not supported

This message occurs when leaving the Grub menu and before the Ubuntu splash screen. How do I fix the problem to clear the message? And what doe is it mean? error: Diskfilter writes are not ...
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104 views

acpi pcc probe failed

The "acpi pcc probe failed" problem when booting Ubuntu 15.04 is still causing me problem. I have tried with "nomodeset" but with the same result. As I'm not able to launch the shell I don't know how ...
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1answer
9 views

`install-grub` claims that I have multiple partiton labels and that embedding is impossible

I am trying to get GRUB installed on my non-booting desktop computer, but I am encountering several errors. Other sources discussing these errors have ascribed them to either a lack of free disk space ...
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16 views

Graphic problems in Ubuntu 14.04?

A week I was having a problem booting into Ubuntu. The symptoms were as follows :- Unable to shutdown Ubuntu Missing mouse for a few seconds after boot Laptop must undergo a force restart after a ...
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1answer
43 views

Windows 10 does not boot from GRUB

I have a problem. I have installed Windows 10 on /dev/sda1 an Ubuntu 14.04 on /dev/sda6. I use GRUB as bootloader but (I don't remember since when) when I choose Windows in the menu it does not boot ...
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3answers
71k views

error: file '/grub/i386-pc/normal.mod' not found

error: file '/grub/i386-pc/normal.mod' not found. grub rescue> What can I do? I just sit and stare at it. I found my old netbook (Dell Inspiron 1010) which I have not used for about four years. ...
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1answer
5k views

Insmod error in grub: symbol not found:grub_realidt

I have a dual boot PC with Windows 7 and Ubuntu. I upgraded from 12.04 to 12.10 and then to 13.04 and since then I have not been able to boot because the PC goes into grub rescue with the error "File ...
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2answers
78 views

Ubuntu 14.04.3 LTS with Windows 10 UEFI GUID custom installation

I have used Ubuntu for many years and someone gave me a computer with Windows 8, later updated to 8.1 and, finally, to 10. The thing is I want to install Ubuntu LTS (14.04.3) alongside Windows 10 ...
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1answer
27 views

Grub Rescue Windows 7 and Ubuntu 14.04

I have an HP Pavilion p7 1010 with 10GB RAM that's dual booted with Windows 7 Home Premium and Ubuntu 14.04. I tried upgrading Windows 7 Home Premium to Windows 7 Professional, and it said that it did ...
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1answer
66 views

GRUB2 shows Windows 7 instead of Windows 10

This is a Q&A that I recently have figured out, so I have posted the answer below. After installing Windows 10, every time I get a kernel update or I run the update-grub2 it always shows Windows ...
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4answers
799 views

GRUB still showing windows 7 boot instead of windows 10

So, I have dual boot on my notebook which are Ubuntu and Windows 7. But recently, I upgraded my windows 7 to windows 10. But when I startup my notebook, it still shows Windows 7 instead of Windows 10. ...
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14 views

How to install Grub from Ubuntu?

Am new to this. Trying to set up a headless NAS machine. So I created a bootable USB Ubuntu 14.04.3 LTS with persistence and SSH setup using my MacBook Pro. So how do I make it such that when I ...
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27 views

Installing Ubuntu 15.04 after Windows 10

I've got two disks with Windows 10 installed on one of them (sda). I want Ubuntu 15.04 on the other (sdb) with a grub menu to allow me to boot into either. I've attempted this previously ended up with ...
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0answers
22 views

Dual booting Win 10 / Ubuntu - Even after Boot Repair twice, it doesn't boot to GRUB

I have a Lenovo ThinkPad Yoga 15 and as the title says, I want to dual boot this distro alongside Windows 10. Thing is, I've been having a problem with the boot order. It always goes into Windows 10 ...
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10answers
7k views

Windows 10 upgrade kills grub and boot-repair doesn't help

I've just upgraded to Windows 10 from Windows 8.1 on my partitioned laptop that has Ubuntu 14.04 installed. Grub no longer appeared on boot so I ran boot-repair from an Ubuntu liveUSB. This didn't ...
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1answer
3k views

Kubuntu UEFI Dual Boot with Windows 7 failed at installing Grub-efi

I want to install Kubuntu 13.04 together with Windows 7 in UEFI Mode. I installed Windows 7 first, which created the EFI boot partition. When it come to installing Kubuntu, the installation failed ...
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19 views

Ubuntu 15.04 with Windows 10 - Windows' system choose screen?

Is there any option to install Ubuntu 15.04 with Windows 10, but without GRUB - with Windows' system choose screen?
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1answer
25 views

Grub boot corrupted after installing Windows 10

I know this question has been asked several times but all the solutions I found googling didn't work at all. I am not sure if this is a grub issue or windows 10 issue. So, I had a disk with Ubuntu ...
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0answers
13 views

Getting grub to detect ubuntu installation

I realize there are probably many questions about this topic already, however, I can't find a solution for my specific problem. I have an ubuntu gnome installation which I don't want to reinstall, ...
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0answers
15 views

Ubuntu 15.04 Boots to a blank screen after Enabling Virtualisation in BIOS

I had dual booted my pc with Windows X and Ubuntu 15.04 I happened to enable the Intel Virtualisation flag in BIOS, and found that the PC does not boot into Ubuntu as after the grub2 screen, after ...
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0answers
54 views

Directly booting into Windows 10 after installing Kubuntu 15.04. No Grub menu

I installed kubuntu 15.04 in UEFI mode (since my windows 10 was also installed in that mode), but instead of showing the grub menu while starting up, the system is directly booting into windows 10. ...
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0answers
35 views

Ubuntu live disk stop halt in the boot process

I have just bought a new ASUS laptop for my son. It have pre-installed Windows 8.1. I made my usb-live stick as I use to and tried install ubuntu. It use to be simple. I switch off fast-boot in bios ...
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0answers
17 views

How to delete triple boot Ubuntu 14.04 Mint 17 & windows 10? [duplicate]

I have installed windows 10 ubuntu & mint on my pc now i want to remove ubuntu and keep linux mint & windows. so how to delete ubuntu? what will happen with mu GRUB & MBR if i delete my ...
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13 views

Dualbooting - lost Grub

I am dual booting OSX Yosemite and Xubuntu 15.04 on my macbook pro 11,2. Anyway, after the install, the macbook boots directly to xubuntu. if i want to boot to OSX, i have to press the ALT key. Is ...
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17 views

Help With the grub menu

Alright here's my situation. I bought a laptop with windows 8.1 already installed in it. I dual booted it with ubuntu 15.04. It worked perfectly fine. Then i upgraded it to windows 10 and then when i ...
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22 views

So if a line of code is missing where would I add it?

So as I've seen in so many other links to password protect grub the all say to change a that goes like this, printf menuentry '$(echo "${LONGNAME} $onstr" | grub_quote) but for me it's not in there so ...
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1answer
29 views

What is help command in grub rescue mode

I tried ?, man and help but these commands did not give me any help. I am looking for a command to show help in grub rescue mode
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6answers
1k views

hide grub on computer start

I tried all the methods that comes in google search for "hide the grub menu on computer start", but still no luck, I guess things work differently on Ubuntu 15.04 ? this is my grub # If you change ...