Questions tagged [grub]

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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Is it possible to get rid of GRUB?

I have a Windows XP box with Ubuntu 8.04 installed on a separate partition. GRUB is defaulted to Ubuntu, which is annoying because most of the time I need to boot to Windows. I want to get rid of ...
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Why do Linux installers install more than one kernel?

For instance, my boot menu has three kernel versions, each with a recovery option. Are these extra options for debugging and troubleshooting?
Tasuret's user avatar
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Is there a good way to make a remote machine dual-bootable into Windows and Linux?

I'd like to make a dual-boot machine that can be rebooted into either OS remotely. The only idea I have is to make the grub configuration live on a FAT partition so that it can be edited by either OS....
Jim Hunziker's user avatar
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Newly upgraded Ubuntu 11.04 VM not booting

I have just upgraded to 11.04 on my VirtualBox VM, and after I start it, it begins to load, but it stops at the line * Checking battery state... [ OK ] I have tried the recovery mode, but to no avail....
Isaac Sanders's user avatar
5 votes
2 answers
7k views

How to load previous kernel via ssh?

I work remotely on my work computer. I am also the root of the workstation that I am sharing with my colleague. Yesterday, I upgraded the kernel to 2.6.31-17 when asked by the update manager but ...
Aamir's user avatar
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How to recover the Windows 10 MBR after w Linux install?

I had an initial installation of Windows 10 I then installed Linux in dual-boot, with grub managing the boot choices (Ubuntu, Windows 10). Everything works as expected. Is there a way to recover ...
WoJ's user avatar
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How do I remove unneccessary boot device options?

Long story short: had win8, decided to make dualboot, installed manjaro linux (mounted /boot/efi to windows' efi partition), oh noes grub doesnt show option to log into win8, managed to create win8 ...
foxneZz's user avatar
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grub-mkrescue not producing bootable image

I'm trying to use the grub-mkrescue command to produce a rescue disk. I invoke it like this: grub-mkrescue -o grub.iso This produces the .iso file, but when I try to boot from it using VirtualBox, ...
Overv's user avatar
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Prevent GRUB updates from changing EFI boot order

I'm currently working on a tripple-boot system with Ubuntu 18.04, macOS and Windows. The standard bootloader that the firmware (ASUS Impact VII, APTIO-based EFI) is supposed to launch is Clover. ...
Oliver Kuckertz's user avatar
5 votes
2 answers
11k views

Windows doesn't boot after removing Ubuntu: grub black screen

I had Ubuntu and Windows installed in dual boot. I wanted to remove Ubuntu and, following suggestions online, I eliminated Ubuntu partitions. When I restarted PC I got this on black screen: "GNU ...
saul's user avatar
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how do I fix a wrong UUID in grub.cfg?

I run Debian Wheezy alone on my PC and I recently copied the root partition to another with rsync as I found that worked well (I also know about dd and ddrescue but they leave unusable space on the ...
mozerella's user avatar
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How do I install GRUB to a partiton and not MBR?

I am trying to dual boot Windows and Linux. I would like to continue using the Windows bootloader in my MBR. I installed Windows 7 first. During the install I left some unallocated space that I ...
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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 ...
Jonathan Voss's user avatar
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How to boot Linux with extlinux

EDIT: Just adding my two more cents after this question becomes a "popular" one. I had been a great fan of grub because it was able to boot everything that I used. However, when grub2 came, I really ...
xpt's user avatar
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Dual booting Windows 2k3 Server and Linux MBR

I have Windows Server 2003 and Linux installed on one hard drive [on separate partitions]. My first partition is the linux boot partition, and maintains Grub. When I boot the Windows partition and ...
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Can I dual boot Linux and Windows 7 but use the Windows bootloader instead of GRUB?

Is it possible to have the Windows bootloader point to Windows 7 and a Linux partition instead of using GRUB to point to Windows 7 and Linux? Any links to tutorials, guides, or how-tos would be ...
CT.'s user avatar
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Dual boot Windows 10 UEFI and Ubuntu using windows bootloader

Any tutorials I can find online use the GRUB bootloader. The only similar thing I can find is this, and it is unanswered and not at all clear what he has done or is trying to do. I have a laptop with ...
Blaine's user avatar
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Stuck on GRUB command prompt after regular kernel update

I am running Debian Wheezy. Update Manager suggest to install kernel update. After update, I reboot system but instead of listing all the kernels (bootloader), it gave me a GRUB command prompt: grub&...
Andrej's user avatar
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1 answer
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GRUB in text-only mode?

I'm attempting to install linux on a (mostly headless) machine that fails when it attempts to pipe out VGA resolution graphics (or, in other words, it can only handle vanilla console text). Ten years ...
Zach Sheffler's user avatar
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3 answers
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How to boot Fedora Live CD iso from a Hard Drive?

I tried to use Grub to boot the Fedora 14 Live CD from its ISO image (SHA256 verified) on the hard drive. I put Fedora-14-x86_64-Live-Desktop.iso in the root directory of the FAT32 partition D: (sda5)...
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5 votes
2 answers
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Install Ubuntu and run in Windows or through normal boot [duplicate]

Possible Duplicate: Booting into a Virtual Machine from a physical installation I like and use Windows 7 more than anything. But there is times when I want to run Ubuntu or some other Linux. ...
alexander7567's user avatar
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1 answer
961 views

How do I move grub so that it's not on the MBR (so I can choose win7 / linux / osX from the refit menu)

I've got a triple boot system with OSX, Ubuntu and Windows 7. Currently when I boot I get the refit menu first which sees all the partitions nicely, and if I choose os X it works just dandy, but if I ...
stib's user avatar
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Problem setting command-line console resolution. vbeinfo in grub2 does not report all resolutions

I have a Asus EEE PC 1005P which I installed a Command-line system on using the Alternate Installer CD of Ubuntu Lucid Lynx. Altough I think this is a general linux and grub2 question. I do not have (...
Deleted's user avatar
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How do I speed up my text console on Ubuntu 18.04?

I just installed 18.04 on a Dell T310 server, and I'm noticing that the text console is unusably slow when scrolling text. To add some numbers to this, invoking dmesg immediately after boot over an ...
Karu's user avatar
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How to configure grub.cfg to decrypt root partition?

I'm using common "pattern" well known as LVM on LUKS. I have /dev/sda1 which is used for /boot and /dev/sda2 which is dm-crypted partition (default aes-sha512-xts). There are two lvm partitions: one ...
user8896663's user avatar
5 votes
1 answer
2k views

Prevent chainloading by grub after rEFind

I triple booted my Macbook 4,1 with Mac OSX 10.5.8, Lubuntu 14.04 and Windows XP SP3 and installed rEFInd as my bootloader. Now what basically happens is, first the Mac bootloader loads invisibly, ...
Peter Raeves's user avatar
5 votes
1 answer
4k views

Make bootable iso with grub chainloading

My parents' pc has windows 7's boot manager installed at MBR and grub2 is installed on /dev/sda2 (booting linux on /dev/sda2). I want to make a bootable cd so that when booted from it just chainloads ...
hlovdal's user avatar
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2 answers
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Dual Boot Installing Ubuntu 12.04 with Windows 7 (64) on a non UEFI system fails

I cannot seem to install the correct boot loader for a non-UEFI firmware system. I'm trying to install Ubuntu 12.04 and Windows 7 (64) which are technically compatible with GPT but for windows only if ...
Randnum's user avatar
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4 answers
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GRUB error: unknown filesystem

I replaced my old laptop drive which was win7 and ubuntu dual boot with an SSD. Now I connected the old drive through a USB adapter and I want to boot from it. But this comes up: unknown filesystem ...
Ali's user avatar
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5 answers
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Grub rescue says all partitions have 'Filesystem is unknown'

I have simple Windows 10 and Ubuntu installation. My latest Windows update just messed with my GRUB boot loader somehow. Every other answer mentions to type a few set boot and set prefix However ...
Daniel Santos's user avatar
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1 answer
1k views

BSOD, MBR corrupt, tried to fix using Testdisk on Linux dual boot, now nothing works

The short story is I received a BSOD from a Windows program. I then couldn't boot Windows. My system is set up with GRUB to dual boot into CentOS, so I booted into CentOS and attempted to fix the MBR ...
Michael's user avatar
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1 answer
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Triple booting on a Mac Book [almost there]; boot loader issues

Here is my current GPT/MBR partition table: Current GPT partition table: # Start LBA End LBA Type 1 40 409639 EFI System (FAT) 2 409640 663646255 Mac OS X ...
user155367's user avatar
4 votes
2 answers
9k views

Why does Grub2 have a Memory test ?

I was previously using Ubuntu Hardy 8.04 and now using Ubuntu Karmic 9.10. I am somewhat offended by the memory tests at the Grub2 start-up ? Why are they there ? Do I really need memory tests at ...
Arkapravo's user avatar
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4 votes
4 answers
7k views

How to make Windows bootloader the default?

When I got a new computer, I installed Ubuntu and Windows XP on it. When I turn it on, GRUB shows up and lets me choose between the OSes. All right so far. A while later, I decided I don't want ...
Javier's user avatar
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4 votes
1 answer
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GRUB doesn't recognize partitions on one harddisk

I have a dualboot computer with Windows Vista (on hd0) and Ubuntu 9.10. The bootloader is GRUB and the windows bootloader lets me decide between Vista and Ubuntu-Installation (broken WuBi). But now (i ...
u149796's user avatar
  • 151
4 votes
3 answers
10k views

How to enable boot timeout in Grub2?

I'm am trying to enable the boot timeout selection in grub2 on Ubuntu 9.10. I modified /etc/default/grub: GRUB_DEFAULT=0 #GRUB_HIDDEN_TIMEOUT=0 GRUB_HIDDEN_TIMEOUT_QUIET=false GRUB_TIMEOUT=2 ...
cmcginty's user avatar
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how to remove menu or change TIMEOUT for selecting OS (Windows 7) in grub boot manager / bootloader?

when I power on my notebook (Lenovo V580c) this window appears: and the TIMEOUT for selecting one of them is 30 seconds. there is only windows 7 on this laptop (in addition to default FreeDOS that ...
faza's user avatar
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4 votes
2 answers
3k views

How can I take a screenshot of the GRUB menu?

How can I take a screenshot like this? I tried pressing Prnt Scrn, and then trying to paste it in MS Paint after booting to Vista, but it did not work.
Lazer's user avatar
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4 answers
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Windows 8 fails to load after Boot Repair

I've got a Sony Vaio laptop. Until yesterday I had Windows 7 and Ubuntu 12.04 (Precise Pangolin) installed. Today I upgraded to Windows 8, which killed my OS selection screen. So I booted to ...
Rudolph Gottesheim's user avatar
4 votes
1 answer
8k views

Boot non EFI MS-DOS Windows 7 partition with grub2-gpt

I have the following setup: UEFI Asus Motherboard GPT TABLE and Ubuntu on /dev/sdb MS-DOS TABLE, Windows 7 and Linux Mint on /dev/sda I try to boot the Windows 7 partitions with grub2 from Ubuntu 11....
dzift's user avatar
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2 answers
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Debian grub2 update removed Windows boot option

Since I updated grub to grub 2 I no longer get the option to boot to Windows (which is unfortunately sometimes necessary for proprietary MSIE browser plugins I need to use for work). Relevant /boot/...
Wrikken's user avatar
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4 votes
2 answers
3k views

Can't enter to BIOS after debian install - black screen

I have Acer Aspire laptop with Windows 10. Recently I've installed Debian 9 in a different partition and everything went fine. The second time I tried to boot into BIOS I got a black screen with a ...
Ali Abdelrahman's user avatar
4 votes
3 answers
29k views

uefi boot not showing ubuntu / GRUB

I've an acer aspire e 14. It has a single HDD with 7 partitions: EFI system on /dev/sda1 Something described as "Microsoft Reserved" on /dev/sda2 Windows 10 FS on /dev/sda3 Linux FS on /dev/sda5 ...
Ignasi's user avatar
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4 votes
2 answers
13k views

Ubuntu Server 14.04 LTS - GRUB fails to install on a VM

I'm trying to install and run Ubuntu Server 14.04.1 LTS on a VirtualBox for testing purposes. However, I can't even pass the installation process without errors, and it will fail to install the GRUB ...
Marcello Mönkemeyer's user avatar
4 votes
4 answers
3k views

How to replace GRUB boot loader, from within Windows?

I have dual boot (Debian and Windows XP), and the boot is from GRUB. I want to remove Linux and grub, and restore the Windows boot. However, I cannot use installation CD to restore the MBR. Thus, I ...
Googlebot's user avatar
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4 votes
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Do bootloaders keep running?

In this question, I'm considering both Windows (BOOTMGR) and Linux (GRUB) bootloaders as well as BIOS and EFI modes. Once a bootloader has invoked a kernel, does the bootloader keep running in any ...
xendi's user avatar
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4 votes
2 answers
11k views

GRUB2: /boot as BTRFS subvolume

Aside from /boot, all my partitions (including root, /) are BTRFS subvolumes. I'm switching to BTRFS RAID1, and for the sake of integrity, want to include /boot within the BTRFS partition. Preferably ...
user19087's user avatar
  • 541
4 votes
1 answer
4k views

GRUB broken after conversion to btrfs

First off, yes, I did, in fact, suspect that changing my filesystem from ext4 to btrfs would break GRUB and fstab. Now, here's what happened. I converted the filesystem seamlessly to btrfs and that ...
Naftuli Kay's user avatar
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4 votes
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How can I get rid of an old HDD that my PC currenty relies on to boot?

So, this was kind of interesting. I have Windows installed on a 500 Gb hard drive, and there's been an additional 80 Gb drive sitting inside my tower for a couple of years, collecting dust (I don't ...
Dan Tao's user avatar
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4 votes
2 answers
10k views

ubuntu 10.04 console resolution

I have installed Ubuntu 10.04 on my HP Pavilion dv6000 After I installed it, the text in the console (when I press ALT+F1) was small and the console had a good resolution (I think the same as my LCD, ...
Ove's user avatar
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