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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cloning my ubuntu image to HDD alongside win10

I bought a new laptop with win 10 pre-installed. Now I want my Ubuntu 14.04 installed on my old laptop HDD to be cloned and installed on the new HDD alongside win 10. So far I was able to run Ubuntu ...
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1answer
19 views

Grub customizer error

When I try to update grub by using grub-customizer it gives me error how can I solve this problem?
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1answer
23 views

“Attempted to read/write outside of hd0” after install Lubuntu alongside Windows 7

I recently installed Lubuntu onto a 160Gb HDD, alongside Windows, which is the first two partitions (System Reserved/C:). The installation completed just fine, with no errors. It then rebooted into ...
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1answer
26 views

Unable to install 14.04. a few tries, a few issues

So, yesterday, win 10 commited suicide again, by deleting internet protocols alone. I'm fed up of this cancer, but I still game, so I want a dual boot At first I was able to install linux alone, ...
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1answer
23 views

Unable to dual boot windows 8.1 with ubuntu 14.04

I m new to this forum and to linux. I have windows 8.1 pre-installed in my HP 15-r007tx and I wanna make it dual boot with ubuntu. But last I tried I finished installing ubuntu based on a few videos ...
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1answer
42 views

Using Grub on hard disk to boot live SD card

I have a laptop running Ubuntu MATE 15.10, and said laptop has an internal media-card reader. I would like to be able to use that media-card reader to boot a liveCD installed on an SD card. ...
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0answers
14 views

GNU GRUB Command Loop! [duplicate]

I need help, im currently on a loop on GNU GRUB command. Ive seen many articles on it but non have help. So i removed ubuntu's space in the Disk Mangment...then I removed the Ubuntu pen drive and ...
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1answer
173 views

Removing Ubuntu with Windows 10 [duplicate]

I have ubuntu installed (dual-boot with Windows 10) on my laptop and my PC, but I noticed that I only really use it on my laptop, so I decided to remove it from my PC and attempt to switch back to the ...
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1answer
43 views

GRUB defaulting to 30 second timeout

In my GRUB configuration, I have the following setting: GRUB_TIMEOUT=3 In general, it works fine. However, I'm using overlayroot, which creates a protected file system (specifically, it uses ...
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0answers
15 views

Where in the server install does it mount /cdrom?

If I try to boot the server installer iso as a CD - whether burnt directly to a CD, mounted in a virtual machine like an optical drive, or expanded onto a USB/SD - it works great. If I try to grub ...
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40 views

Can I access GRUB (or equiv) from Windows cmd?

I've installed Ubuntu at least 15 times and never had so many problems as with Windows 10. I've disabled Fast Boot and Secure Boot, set it to use UEFI and installed Ubuntu 15.10, which worked fine. ...
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1answer
34 views

Installing Win7 SP1, Dual Boot with Ubuntu, using GRUB and not Win Sys Reserved partition

So I have a 240SSD 20gb for Ubuntu (Active) with the GRUB bootloader on it. Just root partition, no home, no swap. And I have a 200gb Windows 7 partition (Primary as well but not active). My issue is ...
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23 views

occasionally boot fails with blank screen (displayport signal error)

Ubuntu 14.04 is installed on ssd sdd1 drive while windows 7 was installed on sdd sdc1. The Ubuntu bootloader grub was installed on sdd drive. Disk drives topology: NAME FSTYPE SIZE MOUNTPOINT ...
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1answer
31 views

Grub console at boot if pen drive not plugged in

I installed Ubuntu 14.04 LTS using a bootable USB pen drive, creating a dual boot with Windows 10. Windows and the EFI partition are on a disk, Ubuntu and its swap partition are on another disk. ...
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1answer
23 views

GRUB stops while booting docking station

My Problem I have some problems starting up my Lenovo T540p in the docking station. If I start outside the docking station Linux is started and everything is perfect. I can put the notebook into the ...
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44 views

Dual Boot LUKS Encryption

I followed this guide: How can I install Ubuntu encrypted with LUKS with dual-boot? but at step 8, where you allow the graphical installer do its work, the grub-amd64-efi install fails. Here is the ...
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2answers
29 views

Booting issue, Lenovo G580 Dual boot

I have Lenovo G580 (core i5 2.5 GHz), with dual boot (Windows 7 & Ubuntu 14.04). Since last 3 year, it was running smoothly without any issue. There was heating issue because of lots dust in ...
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1answer
25 views

Grub is showing Ubuntu but not loading it

First of all thanks to all sharing all kinds of useful info. I have one similar problem, want to take inputs from you. In my Laptop I am using wind7 and Ubuntu12.04 as dual boot. it worked ...
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24 views

How to force update-grub to run only on sda, not on other disks

In my system I have 3 disks: sda: sda1 Arch Linux amd64 sda2 Debian 8 amd64 sda3 Ubuntu 14.04 amd64 sda4 Swap sdb: sdb1 FreeBSD 10.3 amd64 sdc: sdc1 Data All disks have a MBR partitiontable. On ...
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0answers
8 views

how do i switch main bootloader to windows bootloader [duplicate]

I am trying to uninstall Ubuntu and you guys are asking yourself what the hell is he thinking or something similar because this is an Ubuntu forum. I want to know how to switch my main bootloader to ...
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1answer
48 views

UEFI installed 15.10 doesnt boot from /dev/sdb

I tried installing 15.10 on my ssd which is /dev/sdb (unfortunatly), format/set a new gpt partition table to /dev/sda and /dev/sdb and let the installer do its job setup the partitions myself where ...
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0answers
17 views

Can't boot Ubuntu after resizing the home partition

I tried to boot ubuntu from a live-cd in order to shrink my home partition so I can install windows alongside ubuntu. After successfully resizing the partition using Gparted I was unable to boot into ...
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0answers
38 views

Ubuntu 15.10 doesnt boot (low graphics error)

After trying to migrate my USB installation to my formated (ext4) SSD and failed to do so (How to migrate ubuntu 15.10 to an other disk) I tried to fresh install (using the liveDVD i have ) ubuntu ...
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24 views

Yet another Windows install corpting Grub question

I know similar problems have cropped before, but nothing I've found so far has helped (in part because I can't make sense of most of it). So here we go: Windows 10 started installing unprompted. I ...
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29 views

Move the boot loader from Windows partition to Ubuntu

Is it possible to format my Windows partition and move the boot record to Ubuntu partition? The reason I want to remove Windows is because I don't have enough space in my Ubuntu and I use Ubuntu in my ...
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19 views

error on boot, then prompt for grub rescue

My old lenovo atom based notebook. Possibly cooked HD, as on boot I get BIOS only. On booting Ubuntu CD get errors and finally grub rescue> now, get this, on booting and old windows install cd, get ...
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41 views

Unable to boot to Windows 10 after removing Ubuntu 15.10 from dual boot, getting black GRUB screen?

A few months ago I dual booted Ubuntu 15.10 on my laptop alongside Windows 10, but recently I decided to remove Ubuntu. After being naive and following an Ubuntu dual boot removal guide on YouTube I ...
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0answers
21 views

an error occurred while mounting /sys/fs/cgroup press s to skip mounting or m for manual recovery

When I want to install Ubuntu I face this problem: an error occurred while mounting /sys/fs/cgroup press s to skip mounting or m for manual recovery and when I press S and I type ubuntu and ...
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1answer
65 views

Black screen after boot (with backlight)

I use an Asus S500CA, previously installed Windows 8.1 and just installed a dual-boot Ubuntu 14.04 At the first time it was fine, everything was normal. Then I rebooted, and the GRUB menu showed up, ...
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0answers
50 views

Problems With 64 bit OS

Just as title said I'm having a lot of problems with installing 64-bit OS. Last week I installed Ubuntu 15.10 64-bit on my laptop. The installation was perfect, no error, a clean wipe HDD install. ...
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3answers
44 views

I deleted Ubuntu's partition on my hard drive now I get gnu grub version 2.02 on boot

I wanted to get rid of Ubuntu, but, like an idiot, I just deleted its volume on my hard drive. Now, when I boot up, I get a gnu grub command line screen. How can I get past and fix this?
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1answer
69 views

Win10 created more than 4 primary partitions, it seems?! gparted is not amused

first the story: I moved my Windows partition "to the left", then were unable to (dual) boot Windows, tried the repair option on the Win8 CD ... and now seem to have more than 4 primary partitions. ...
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1answer
29 views

Ubuntu 15.10, grub freeze

I installed linux alongside to windows 7.I made a bootable ubuntu 15.10(from official ubuntu website) on USB(program to make linux bootable downloaded from http://www.pendrivelinux.com/) and when i'm ...
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0answers
26 views

attempt to read or write outside of disk `hd0`. Then “a tmp error(6) occured attempting to read a pcr value”

I'm using a standalone Ubuntu 14.04 LTS OS on my laptop (I don't use dualboot). Suddenly, a freeze forced me to manually restart the laptop (by pressing power button). Then after I started the system, ...
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40 views

initramfs error after booting

I have a quick question. I just recently did a full install of Ubuntu 14.04 on my 128GB USB and tried booting it after the installation was complete. However, when I boot it through the USB, it ...
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1answer
53 views

how to enable dual booting after install ubuntu in Windows Machine?

I Installed Ubuntu on my windows laptop in separate partition. I did swap root and home partition for ubuntu and separate partition. after installing i cant able to login to my windows OS.. ...
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36 views

initramfs boot error on dual boot machine

Scenario: Dual boot windows7 and ubuntu machine. I downloaded a new linux kernel and then implemented 3 system calls on it. Then I compiled the kernel on ubuntu and tried to boot into the newly ...
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0answers
15 views

Want to completely delete a partition(make it usable)

I recently installed cub linux (chromixium) alongside ubuntu in a dual boot. After a while, I got tired of chromixium and deleted its partition through gparted. I got some boot up errors taking me to ...
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14 views

Unknown file system grub

When I am upgrade to win 10 It say unknown filesystem and I use Set boot=(hd0,msdos6) Set prefix=(hd0,msdos6)/boot/grub Insmod normal When I press enter it say Unknown file system !!
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3answers
480 views

unable to install Ubuntu 16.04 alongside Windows

I had installed Ubuntu 15.04 in the past alongside Windows by disabling secure boot and UEFI. Then I got dissatisfied by Ubuntu performance. I decided to remove Ubuntu, deleted most of the stuff. ...
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1answer
40 views

Dual boot fail, Windows 7 doesnt Load

After installing Ubuntu in a dual boot with Windows 7, I could not at first boot into either Ubuntu or Windows 7. I then ran boot-repair from a live USB and restarted. After this, I was able to boot ...
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0answers
28 views

rescuing Ubuntu server from grub prompt

I have a linux server (virtual server) Linux LTS 14.04. I recently extended its harddrive (virtual) from 40 to 200 GB. Soon after that, upon a restart its filesystem was marked as readonly. On the ...
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1answer
47 views

BootRepair doesn't start when trying to recover boot

I have a Lenovo G40 that came with windows 10. I resized/deleted some partitions and now I have 9 partitions, one of them with Windows 10 and other with Ubuntu. Problem is when updating, windows 10 ...
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1answer
236 views

Upgrade from 14.04 to 16.04 LTS failed with a kernel panic [closed]

I tried to upgrade to 16.04 from 14.04 using update-manager -d. After installing new packages/updates, my system is not booting. it's showing the following error. drm_kms_helper : panic occurred, ...
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1answer
29 views

Creating a extended partition

I have dual booted windows 10 and ubuntu 15.04. Now I want to reinstall both OS's. The problem is that I already have 4 partitions(Ubuntu, Ubuntu swap, Windows 10, System reserved). I shrank the ...
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44 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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1answer
67 views

Boot Ubuntu from external disk in UEFI mode

I have Ubuntu 14.10 32bit installed in an external USB hard disk. I am trying to boot it in a UEFI netbook (Asus X205TA) It seems the UEFI mode is preventing me from booting it. How can I boot it ...
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1answer
189 views

Accidental 'sudo grub-install'

I accidentally executed: sudo grub-install Now I don't want to restart the PC, because I'm afraid it might not boot. How can I check everything is alright?
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1answer
28 views

Laptop not booting after fresh ubuntu mate 15 install

I just installed Ubuntu Mate 15 onto my laptop. After a successful install, I can't seem to boot into the OS. There's a blinking cursor on the screen and that's it. I used a LiveCD to try repairing it ...
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0answers
22 views

Can't get into GRUB with 2 drives installed after changing mainboard

I used to use dual drive (SSD mSATA+HDD) with Dual OS on SSD (Ubuntu+Windows 10) and my main boot loader is Ubuntu's GRUB. Yesterday I just got back my laptop from repair center due to broken USB, so ...