GRUB (GRand Unified Bootloader) is a multiboot bootloader from the GNU project. This tag is for questions relating to the legacy version of GRUB. Use the GRUB2 tag for questions dealing with GRUB2, a rewritten version.

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grub fails to find btrfs-filesystem after adding new devices

Having my server (Ubuntu 15.04) equipped with two 1TB HDDs in raid1, I added yesterday two new 4TB HDDs. After adding those with btrfs device add ... I rebalanced the system with btrfs balance ...
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55 views

How do I migrate Windows 10 and Grub to a new Hard Drive?

I have two drives: C:, which contains a Grub bootloader and Windows 10, and D: which contains an NTFS partition and also all my Ubuntu partitions. I would like to replace my C: drive with a new ...
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1answer
44 views

Arch - GRUB with dm-crypt LUKS on LVM

The last time I had to install Arch was a year or so ago. Grub always gives me the most trouble but I prefer it over syslinux. HOW CAN I GET GRUB TO RECOGNIZE MY ENCRYPTED VOLUME? I get the GRUB ...
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2answers
42 views

GRUB boot error rescue

Recently created a Linux/windows 10 dual boot and something went wrong.... every time i boot up my PC it brings me straight to GRUB rescue and i am unable to type or access the BIOS menu (i have tried ...
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18 views

Shift key doesn't work for GRUB boot loader

I have absolutely no idea on how to get to the GRUB loader. I have an iMac with Ubuntu single-installed(if that affects anything). I tried using shift and right-shift on bootup, and I get an infinite ...
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0answers
443 views

Windows 10 ISO in Grub2 Multiboot

I'm attempting to create a multipurpose AIO USB stick for everyday use. So far I've been able to get Mint, Tails, And Hiren's boot cd all successfully working off of one device similar to the tutorial ...
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1answer
287 views

Repairing bootloader for kali linux 2.0

I'm trying to repair the boot loader for kali 2.0. I'm not sure what caused it but it doesn't show up in the bios anymore. I found this code: mount /dev/sda3 /mnt mount --bind /dev /mnt/dev mount ...
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16 views

Need explicit steps on how to prevent “GRUB RESCUE” issue when installing dual-boot Ubuntu

Now, there are many questions on how to fix this.My question is how to prevent it from happening. Currently, I have 2 hard disks. The first one has only Windows 7 Home Premium partition C: while the ...
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30 views

Cant boot FreeBSD 10.1 using grub2

I installed FreeBSD 10.1 on a machine that has Xubuntu already. The installation completed successfully but im not able to boot it. On my grub boot screen i get only 2 options: ubuntu and advanced ...
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1answer
76 views

OSX won't boot to USB with persistent Arch Linux installed, while Windows will boot to it

When I hold the C key on startup on OSX Yosemite 10.10.5 (macbook pro retina 2015 with force touch), it doesn't boot to the USB. Holding alt/option doesn't show the USB drive, and changing boot order ...
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1answer
37 views

Places or books to start learning PXE booting [closed]

I am currently playing around with PXE booting and PXELINUX/SYSLINUX. I have tried LTSP , thinmachine, FOG project and some others. Currently I am trying to understand how PXELINUX is working under ...
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1answer
23 views

Boot Windows install environment using grub?

I work as a computer repair technician and we have every Windows install disk under the sun for when we need to reinstall whatever of the myriad Windows versions the customer in question may happen to ...
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0answers
23 views

Where to find docs about multiboot2 cmd in grub2?

GNU docs almost nothing about multiboot2 command (although I could find linux, boot commands in the 14.3 The list of command-line and menu entry commands section), and enter link description here ...
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0answers
27 views

btrfs mounts wrong subvolume on boot

My system uses btrfs for its root volume, with daily snapshots. I'm trying to roll back to a recent backup, but it persists in mounting the same subvolume on boot even though I updated the default ...
0
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1answer
18 views

Asus X58C running Vista Basic cannot start up after installing Ubuntu and other messing

I installed Ubuntu not really knowing what I was doing. For a while, I could run either Ubuntu or Vista. I wanted to get rid of Ubuntu, but didn't know how. Don't know what I did, but I get error no ...
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1answer
55 views

How to boot from USB flash via EFI?

I have setup the following partition table on flash-drive: Disklabel type: gpt Device Start End Sectors Size Type /dev/sdb1 2048 34815 32768 16M EFI System /dev/sdb2 ...
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0answers
11 views

Grub not booting correct Windows

I recently installed a SSD and cloned my C: onto it. When I select the SSD Windows boot (sde1) in the grub bootloader, it still boots up the old Windows boot on sdc2.
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1answer
50 views

Can't access new partition via boot menu

I created a partition on my hard drive from about 23GB of empty space via Windows Disk Management in Windows 10. I then loaded up an Elementary OS Freya live USB and installed Elementary OS on that ...
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30 views

dd'ed the partition my debian was running on, now I get 'unknown file system'. how to make the (surviving) files accessible again?

details: Wanted to create linux boot stick with dd command (1,1 GB iso) Copy paste mistake led to dd'ing this iso to the partition running my debian jessie (sda1) After reboot I get 'unknown file ...
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15 views

UEFI Dual boot: can't see GRUB. In legacy mode boots Linux, in UEFI mode boots Windows [duplicate]

I have a UEFI laptop that came with Windows 7. Now I want to add Linux Mint 17, putting it in dual boot. I put my PC in Legacy Mode instead of EFI mode, shrunk Windows partition and installed it by ...
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1answer
31 views

GRUB menu edit protection only

I set up the GRUB password protection on my Ubuntu LTS 14 64bits. To do that I generated a hash of the password with grub-mkpasswd-pbkdf2. Then I edited /etc/grub.d/40_custom to add those 2 lines: ...
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0answers
36 views

Grub-2 not booting Windows

I have openSuse 42 and Windows 8. After a clean installation that worked very well (even dealing with UEFI), I just noticed that windows does not boot. I took a picture of the error I get . This ...
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24 views

Vboot vs open source grub?

I'm trying to use vboot from vmlite to boot my computer from a vhd and there are two downloads available the trial version of vboot and the open source grub used in vboot. What is the difference ...
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38 views

Linux Mint startx won't load after update

i recently updated my linuxmint. I do not remember which version i was using and to which i updated, most probably it was updated to the latest. After finishing the update, i rebooted my PC and it ...
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117 views

How to fix a messy GRUB config with Windows 10 and Ubuntu 15?

This is my set up - I have an SSD with Windows 10 and Ubuntu 15 dual booted, and an additional HDD which I use for extra data. Every so often I will get this error when selecting Windows 10 from the ...
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12 views

How can restore Windows 8.1 after installing KALI Linux?

I've installed Kali Linux over Windows 8.1. Following listing presents my disk layout. fdisk -l -u output Disk /dev/sda: 465.8 GiB, 500107862016 bytes, 976773168 sectors Units: sectors of 1 * ...
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1answer
346 views

Booting Fedora 23 after installation fails

I just installed the Fedora 23 from the official iso. Installation succeed and computer reboot. But Fedora starting to load (just after grub selection) it write on my screen upper the loading bar: ...
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1answer
23 views

How to select grub entry via PS2 port?

We want to output the grub entry to serial port and select the grub entry on another machine via serial port. We have two machines. For the machine with built-in serial port, we followed the ...
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0answers
82 views

After Windows 10 upgrade + grub fix Windows takes too long to boot. (elementary os dual boot)

I had Windows 8.1 installed (+ elementary os) and boot time was normal. Then I upgraded to Windows 10 and grub disappeared. I fixed it by using this command: "bcdedit /set {bootmgr} path ...
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1answer
21 views

Grub FlipFlop Boot

Is it possible to configure grub2 boot loader to flipflip boot between two different OS? MY set-up is that I have a beefy lab computer that is by some people to run Window 10 and others Linux (Suse), ...
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0answers
305 views

Grub not showing after installing Elementary OS alongside Windows 10 [UEFI]

I've tried to install elementary OS alongside Windows 10 in a UEFI machine. I first did it with Secure Boot enabled, using the "something more" option. I configured the root and swap partitions as I ...
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2answers
118 views

How to remove 'ubuntu' option from os selection menu?

I recently installed Ubuntu 15.04 on my Dell Vostro 15 3546. Its has Windows 8.1 installed. I divided the 500 GB HDD in to 2 and installed Ubuntu in one partition. Due to some error in installation I ...
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3answers
156 views

Can I upgrade to Windows 10 if I got a broken Windows 8 installation?

I had 2 partitions, one was for Ubuntu Linux, (100 GB) and one was for Windows 8.1 (400 GB). I am dual-booting it with GRUB. Since I installed Ubuntu, it simply broke. My question is: How can I ...
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1answer
29 views

unable to access windows partition after deleting partition [duplicate]

Here my situation, I have a dual boot one partition with windows 10 and another one with Ubuntu. I just delete the ubuntu partition in disk manager in windows. But then when I try to reboot, I get a ...
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1answer
20 views

Need help for Grub configuration

I have a problem with my boot configuration of grub. I installed openSuse on my Laptop and now my Windows 8 disappeared from the boot menu. I am not sure if I use EFI, but I can see it the fdisk ...
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0answers
17 views

Setting up GRUB on another disk with configuration file

Suppose I have an external hard drive. This hard drive has one partition starting at sector 2048. This partition's file system is ext4. Now suppose that I wish to install GRUB 2 to this external hard ...
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1answer
55 views

GRUB prompt when trying to boot into Windows after a repartition

I set up my computer to dual boot with Windows 7 and RHEL 5. Everything was running well until I tried to shrink the D drive with Partition Master in Windows.But now I can only boot Red Hat and when ...
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0answers
29 views

Grub2 with BIOS and EFI support

I am trying to create a multiboot usb. I want it to be as universal as possible which means it should be able to at least be able to boot from EFI and legacy BIOS computers. So far I have installed ...
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1answer
157 views

Fix GRUB/EFI Boot partition after deleting Ubuntu

I inatalled Ubuntu in a new (Asus Zenbook UX305) laptop, with Windows 8.1 preinstalled, I choosed 'Install alongside' option when installing Ubuntu. Then I wanted to try ElementaryOS, and I chosen ...
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0answers
7 views

Windows 7 appeared on Grub without partitioning

I recently noticed that in Grub, I have the option to load into windows 7 (with the path /dev/sdb1. This is strange because I haven't partitioned my disk or installed windows 7. If I select the option ...
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1answer
16 views

What determines the name QEMU will give a drive?

I am playing around with GRUB 2 as a BIOS for QEMU. I expected that I could just use hd0,msdos1 as the root for GRUB, but it looks like it is not that simple. When I boot a VM with qemu-system-x86_64 ...
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1answer
1k views

Linux Mint Cinnamon doesn't detect Windows 10 during installation

I have been struggling with this problem for two days now. I Googled a lot of posts, but I just can't solve this. So I have clean installed Windows 10 (BIOS is normal, no UEFI – most people fix it ...
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0answers
72 views

Remove Old Grub Loader From Second Drive Without Linux (Windows 7)

I have two drives. One small SSD which windows 7 is installed on. One terrabyte hard drive from ages ago. It has all my data and steam games. I just got a new motherboard and CPU so I reinstalled ...
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2answers
86 views

I can't remove GRUB from windows 8, How to remove it?

I'm kind of newbee in using UBUNTU and a little curious about what does it do, so I used my old HDD to use it as an external storage and install UBUNTU on it. After installing it, using it for a ...
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46 views

Getting Grub to display the boot menu before attempting to decrypt

I wasn't able to find a guide on this anywhere online - I'm dual-booting with Windows and an encrypted Arch system (following the guide found on the Arch wiki), both show up fine in my GRUB boot menu, ...
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0answers
226 views

Grub can't recognize Windows 10

I previously had Windows 7 installed alongside Ubuntu 14.04. I recently upgraded to Windows 10 which removed the grub bootloader. So, I used boot-repair from a live USB to restore grub. But now grub ...
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1answer
463 views

Grub2: is it possible to disable graphics drivers through kernel boot command?

Questions Here are my questions: is it possible to disable the fglrx Linux driver or do anything to suppress functionality (e.g. 3D acceleration) that is not cross-hardware compatible via a grub ...
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0answers
16 views

Can initramfs chainload another boot partition?

Is it possible to use an initramfs to boot another disk / partition? I'm looking for functionality similar to GRUBs chainloader. I need to boot a disk, do some stuff, mount a second disk, boot the ...
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320 views

Is it possible to install Linux and Windows on a M2 SSD and setup a dual boot with grub or other?

My goal is to be able to switch between linux and windows very fast so I'd like to make two partitions on a M2 SSD (Samsung SM951 512GB), one for linux and one for windows. Then I would like to be ...
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0answers
21 views

Why is GRUB working on one computer but not the other?

I've installed Arch Linux on to a USB stick. The stick is partitioned as GPT, and there are two partitions - an EFI boot partition, formatted as FAT32, and a boot partition formatted as EXT4. When ...