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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Dual boot 10.04 and 12.04

I'm currently running 12.04, my 160GB hard disk is messed up, I'm going to completely format it. Here is what I want to do: Keep 10 GB for 10.04 / Keep 10 GB for 12.04 / Keep 4 GB for /swap rest for ...
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2answers
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Frequent grub rescue error: unknown filesystem [closed]

It's really frustrating. Three week's back story: I faced the following error on ubuntu 10.04 LTS Desktop, error : unknown filesystem grub rescue> I tried many solutions online apart from 1 ...
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5answers
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Configure Dual Boot, Windows 7 and Ubuntu 12.04 with or without EFI

I have just installed Ubuntu 12.04 on a laptop with Windows 7 but I don't get to boot from Ubuntu. First, during the installation I made these partitions (may be too many): /dev/sda1 FAT32 SYSTEM ...
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3answers
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Grub Doesn't Display after installing Xubuntu 12.04

I just installed Xubuntu 12.04 alongside Windows XP. I specified my own partitions. However, on boot Grub doesn't seem to appear with the monitor showing "No Signal". After approximately 10 secs (the ...
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2answers
313 views

GRUB configuration not responding

Recently, I tried to reconfigure GRUB to boot kernel 3.2 instead of 3.4, but by booting, GRUB is not responding to any changes I make in the grub.cfg file. Editing /etc/default/grub and updating it ...
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1answer
721 views

How do I set up GRUB to display on 2 monitors?

How do I set up GRUB to display on 2 monitors? I have a laptop plugged in to a external monitor. Most of the time, I leave the laptop closed, and just use the monitor, but when I boot up, I have to ...
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4answers
4k views

All files gone after running fsck. How can I recover my files?

I installed Ubuntu server 10.04 LTS. It worked great for many months, until today I decided to run fsck on the system partition and although it warned me, I kept pressing yes and now it will only boot ...
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1answer
2k views

How do I permanently reduce Grub waiting time?

I edited /boot/grub/grub.cfg to reduce the Grub waiting time, but after recent update resets grub.cfg file to its initial state. I know there is a way to make it permanent, but I don't know how. ...
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1answer
2k views

Ubuntu not showing on grub menu

I've unchecked some wrong box in grub-customizer and now grub menu shows only windows. Can I boot Ubuntu using grub CLI and resolve this because I don't have Ubuntu live CD.I've even tried Super grub ...
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1answer
13k views

Missing vmlinuz from /boot

I am running a laptop with Windows 7 and Ubuntu 12.04. I had grub issues following a partition resize which were eventually found to be problems due to missing kernel files. (These problems did not ...
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0answers
220 views

“Unknown Filesystem” error without CDROM [duplicate]

I've got a problem with Ubuntu 12.04 LTS. At first I ran mount command on terminal. Then I restarted my computer. After that, when my computer opened there is writing this: error: unknown ...
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3answers
178 views

A routine update wrote Grub in the MBR; how do I undo it?

I have Ubuntu 12.04 and Windows7 installed onto a machine so that I could boot into either one. I wanted to keep using the Windows bootloader (actually EasyBCD), so I made sure that I didn't install ...
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1answer
89k views

How do I boot into recovery mode?

I recently tried booting into the Grub2's menu entry "Ubuntu GNU/Linux, with Linux 3.2.0-24-generic-pae (Recovery Mode) just to see what was there. It booted successfully, but I had no idea what to ...
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1answer
225 views

how to upgrade Ubuntu 11.10 to Ubuntu 12.04 LTS using Ubuntu 12.04 Desktop DVD

I am using dell inspiron 1545 laptop, dual boot OS WinVista & Ubuntu 11.10, I have got a Ubuntu 12.04 LTS Precise Pangolin Release i386.iso I want to Upgrade to Ubuntu 12.04 from 11.10 from the ...
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6answers
4k views

12.04 refuses to install with Windows 7

I have a desktop computer with windows 7 installed on it. Recently I downloaded Ubuntu 12.04 and burned the ISO image on a new blank DVD. After successfully burning DVD, I booted from the DAD. Ubuntu ...
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5answers
22k views

Sony VAIO with Insyde H2O EFI bios will not boot into GRUB EFI

I bought a new Sony Vaio S series laptop. It uses Insyde H2O BIOS EFI, and trying to install Linux on it is driving me crazy. root@kubuntu:~# parted /dev/sda print Model: ATA Hitachi HTS72756 (scsi) ...
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1answer
151 views

ubuntu live cd start up error

First off, I'm new to the Linux scene. This is my first attempt to make a single boot installation for Ubuntu. I tried it for a few days in dual boot with win7 and I was sold, so i removed the tumor ...
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2answers
2k views

I am having problems booting after I installed Ubuntu. How can I collect information to diagnose and fix the problem?

After installing or updating Ubuntu, I am having problems using GRUB to boot my computer. How do I collect information to determine what is wrong so that I can fix it? Note: This question and any ...
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2answers
3k views

Ubuntu recognized by os-prober but not grub

I am dual-booting Windows 7 and Ubuntu 12.04. I reduced my Windows 7 partition and increased my Ubuntu partition using gparted from a 12.04 live CD. Everything was fine for about a week. Then the ...
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1answer
2k views

How to add a command permanently to grub2

I have a fairly special setup, using Linux on a MacBook Laptop. to switch off my secondary graphics card in it I'm required to add these lines to my grub outb 0x728 1 outb 0x710 2 outb 0x740 2 outb ...
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2answers
4k views

How to delete kernel entries in the Grub 2 menu whose kernels are removed?

I executed the shell script given in How do I delete kernels from a server?. It deleted old kernels but not their associated kernel entries in the Grub 2 menu. For example, the shell script did not ...
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1answer
618 views

System freeze after adding noapic acpi=noirq nolapic

I have an issues on which your expert knowledge is required so that I can solve it, here is the scenario: [Problem was] Sticky mouse after installation! To solve this issues I did following ...
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2answers
588 views

Create option to load Ubuntu or Windows 7 at start-up

We have a new Dell Optiplex 790 desktop with Windows 7 and just installed Ubuntu 12.04 on it using a USB stick that was configured as a boot drive. We created a new partition for Ubuntu during ...
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2answers
2k views

How can I start Busybox at boot time, from GRUB, or even before GRUB?

Most Busybox questions are related to the fact that users are dropped to a Busybox shell due to some unknown issues at boot time. This must make Busybox one of the most hated pieces of software. My ...
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3answers
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I have installed Ubuntu 12.04, now my Windows Vista doesn't boot

I have a Windows Vista computer. And I've installed Ubuntu 12.04 on it. But now, when I boot my device it doesn't ask me which OS I want to choose, instead it just boots in Ubuntu. Please help me! I ...
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1answer
784 views

Problem booting Windows after failed installation of 12.04 alongside Windows 7

I tried to install in my laptop 12.04 so that I can dual-boot with Windows 7. I made some mistakes during this process and I didn't manage to install Ubuntu. But my real problem now is that I'm afraid ...
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1answer
1k views

Boot fail - Asus EEE PC

I installed Ubuntu 12.04 as my main operating system on my Asus EEE PC 1005HA machine. When I restarted the pc, the boot loader didn't come up. I got only a black screen. During the installation ...
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1answer
540 views

Can't select anything on GRUB and it just boots to the first option, what could be the problem?

I'm using a USB keyboard but it wasn't like this right after I installed 12.04x64 One detail though: right after I installed the AMD Radeon drivers both the GRUB screen and Ubuntu's boot sequence ...
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3answers
2k views

How to fix Ubuntu 12.04 boot, using Windows XP?

I installed Ubuntu 12.04 from USB. Now there is no option to choose Linux or Windows, because the boot-loader is missing. Can I repair this using Windows XP, without using Ubuntu or a virtual ...
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5answers
2k views

Windows no longer boots on dual-boot system

While trying to delete an Ubuntu partition from my hdd I accidentally rebooted my computer. (Note: the partition was originally made from an existing partition using paragon.) After that when I tried ...
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1answer
946 views

Will grub overwrite EasyBCD entry if I already have Windows 7 and Windows XP installed?

Installing Ubuntu on EEE PC which already has Windows 7 and Windows XP in dual boot using Easy BCD I have an ASUS EEE PC 1015PEM with Windows 7 starter and Windows XP in dual boot configuration on ...
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How to get grub2 to remember last choice?

Grub2 - Community Ubuntu Documentation says the following: Saving an OS can be achieved by running sudo grub-set-default if DEFAULT=saved is set in /etc/default/grub. It may also be saved if ...
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2answers
179 views

Which file to associate with the Windows boot manager to load GRUB?

I installed Ubuntu using a Live USB. I have a Windows partition and used GParted to create an extended partition in order to lay my new distro. When I rebooted my computer after the installation, no ...
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3answers
9k views

No grub menu after installing Ubuntu

I installed Ubuntu 12.04 from USB from inside Windows. When I restarted the PC there was no grub menu. How to fix this?
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1answer
440 views

grub recover command line

Recently the service provider link suddenly broke,while I was updating. Then suddenly while I was trying to boot, i could not. The message on my screen was grub recover missing, and I had no option ...
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3answers
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How do I set the grub timeout and the grub default boot entry?

In Ubuntu 12.04 (or above), how do I set the GRUB time and the default OS (that I see at boot time) as I'm dual-booting Windows (7/8) and Ubuntu (12.04 or above)?
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1answer
1k views

Problem with GRUB not being on Hard Disk

I have just done an install of Ubuntu 12.04 on a new PC with no OS from a USB but the GRUB has not installed onto the Hard Disk but onto Flash, how do I correct this ?
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0answers
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Installing Ubuntu 12.04 on Asus Eee Pc FREEZES on “grub-install dummy” [closed]

Trying to install a completely new copy of ubuntu 12.04 on an Asus Eee pc. The install almost completes but then it freezes on "grub-install dummy".
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1answer
4k views

Unable to boot OS X after installing Ubuntu 12.04

I installed Ubuntu 12.04 on my MB (aluminium late 2008). After installing Ubuntu I am unable to boot into OS X. Sequence of events: Install reFit on OS X Install Ubuntu on a partitioned drive. I ...
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6answers
610 views

Win7 no longer available after installing 12.04

I have installed Ubuntu 12.04 but my Windows 7 partition seems to have been lost. It is in sda2. Can anyone help me how to get this Windows 7 partition back without having to reinstall Windows 7? ...
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3answers
3k views

Grub won't boot windows after update from 11.10 to 12.04

thanks for your time and reading this, here's the deal: i upgraded from 11.10 to 12.04 and everything worked out until i rebooted, i had 11.10 sucessfully running as a dual boot with windows vista. ...
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2answers
689 views

Grub has two time the same kernels in menu

After update (yesterday) from Ubuntu 12.04, GRUB has two of the same kernels in the boot menu for Ubuntu 12.04 (I have triple boot). I have already reinstalled GRUB, but with the same result. It seems ...
2
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1answer
976 views

unable to boot from live USB

Edit: Welp, I re-made the live USB and now it works fine. Thanks for the replies! Another computing lesson learned the hard way. I was messing around with my new dual-boot (win7 and the latest ...
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1answer
2k views

GRUB broken again

Please help, my grub is broken again, and again, I don't know why, maybe latest update, I'm not sure, it starts to annoy me. Error I get when I boot: Symbol not found: grub_divmod64_fulll And it ...
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2answers
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How do I apt-get -y dist-upgrade without a grub config prompt?

Per Make apt-get (or aptitude) run with -y but not prompt for replacement of configuration files? I did the following: ec2run ami-3c994355 --region us-east-1 -n 1 -t m1.large -z us-east-1d On the ...
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2answers
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Encrypted windows partition with ubuntu / Grub configuration

guys i would like to encrypt my windows partition only , as i have dual boot windows 7 ultimate and ubuntu 12.04. I would like to encrypt all my windows partition with truecrypt as i suppose you ...
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1answer
5k views

grub-install failure (fatal error)

I am trying to install ubuntu 12.04 from a usb side by side with windows 7. My hard drive already had 3 partitions by window: sda1 (1.8GB) for system sda2 (700 GB) for windows sda3(16GB) for ...
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6answers
14k views

How to remove duplicate entries in Grub menu?

After today's update, Ubuntu asked me to replace some files and I blindly accepted. After I restarted PC after the update, I saw duplicate entries in the grub menu: Here's the image of the grub ...
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1answer
364 views

Installation doesn't work on a Lenovo IdeaPad g570

the issue i'm having is that every time i try to install ubuntu on my BRAND NEW lenovo it just crashes and one timr CORRUPTED GRUB it's getting extremely annoying and i need help
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2answers
718 views

Why won't grub load my newly upgraded kernel?

I upgrade my kernel when I run update-grub, these are found Searching for splash image ... none found, skipping ... Found kernel: /boot/vmlinuz-3.4.0-3-generic Found kernel: ...