Questions tagged [grub2]

GRUB 2 is the next generation of the GRand Unified Bootloader (GRUB). Ubuntu has used GRUB 2 as the boot loader since 9.10 (Karmic Koala). Commonly referred to as simply "GRUB".

4,221 questions with no upvoted or accepted answers
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Failed to start Snappy Daemon

Tried restarting my computer and while it's booting Ubuntu 18.04, it gets hung up after: [FAILED] Failed to start Snappy daemon, See 'systemct1 status snapd.service' for details, New to Ubuntu so I'...
6
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0answers
1k views

OS-prober is taking a really long time

Any time I update my GRUB configuration or install a kernel update that has the update manager update my grub configuration, the os-prober part of the configuration hangs for sometimes 10-20 minutes. ...
6
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1answer
11k 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 ...
6
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2answers
606 views

How can I create a live USB with persistant storage that will run on a Macbook Air without using rEFIt?

Sometimes I have to use a MacBook Air (2,1) at work. I'd like to be able to have an Ubuntu USB stick with persistent storage space for it, that does not require any modification of the machine's ...
5
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2answers
15k views

Remove windows boot manager and use grub instead

I have a dual boot with windows 10 and Ubuntu 14.04 when I boot my PC the windows boot manager shows up and I get the choice between Windows and Ubuntu. The problem is that when I choose Ubuntu, grub ...
5
votes
1answer
202 views

Recover Ubuntu 14.04 Encrypted Install

I have an encrypted install (Full drive, not only home directory) of Ubuntu 14.04 on a 1TB SSD. I do know the passkey to unencrypt everything. It's just a matter of finding the files now. Here's what ...
5
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0answers
8k views

Error: environment block too small. Press any key to continue

I am running Ubuntu 15.04 and getting this error in grub menu Error: environment block too small. Press any key to continue... I went through this AskUbuntu Post about this problem but unable to ...
5
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3answers
8k views

Dual Monitor Setup : Grub loader goes to HDTV even if it is turned off

I'm sorry if this is a repeat but I can't find the answer to this anywhere. I have a dual boot system with Windows 7 and Ubuntu 12.04. I recently bought an HDTV and connected it to my computer by ...
5
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1answer
15k views

What location to put bootloader, when running multiple drives and partition

I have Win8 on my desktop, where a 120G SSD is used to run windows and some select applications, while I have a 2TB HDD to provide basic file storage and where possible, install applications instead ...
5
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2answers
2k views

How to recover a lost partition on Ubuntu?

I had two Linux OS installed on my machine: Backtrack 5 Gnome and Backtrack5 KDE. I updated the Gnome version and when I rebooted my Grub2 boot manager displayed a grub rescue> command line. I ...
5
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8answers
32k views

No option to choose between Ubuntu or Windows at startup; tried many suggestions already

Yesterday I used a live cd to install Ubuntu 14.04 on a computer already loaded with Windows 8. The Ubuntu install did NOT recognize any operating system on the computer, so I chose Something else ...
4
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1answer
480 views

Brightness fn keys not working new HP gaming laptop

I know This has been asked to death. I have dealt with it before on other laptops. And I have tried al these combinations in /et/default/grub and run a sudo update-grub reboot, test, fail. ...
4
votes
1answer
2k views

Chainload from windows boot manager to Grub with Secure Boot enabled

I have a UEFI laptop with Bitlocker on the Windows partition. This forces the primary bootloader to be Windows Boot Manager with Secure Boot enabled in order for Bitlocker to work properly on Windows. ...
4
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0answers
2k views

Avoid Grub2 password protect on every boot?

I have set Grub2 password following this thread. It works fine but now it prompts for username and password every time I start or restart my computer. It's actually the first thing it does. Now, if ...
4
votes
1answer
1k views

Bitlocker-encrypted Windows and LUKS-encypted Xubuntu in Dual Boot

Company policies instruct me to use a Bitlocker encrypted Windows 10 (No turning off Secure Boot), but I also use Linux, which has to be LUKS encrypted. Now I need to set this system up for Dual-Boot ...
4
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0answers
136 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 ...
4
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2answers
7k views

15.10 No GRUB menu with windows 10

I am trying to get Ubuntu 15.10 dual booted with Windows 10. But the GRUB menu does not show up. The PC came pre-installed with Windows 8.1 and I upgraded it to Windows 10. Following directions from ...
4
votes
1answer
936 views

Can't type passphrase to decrypt disk

Just wiped out everything on my Macbook Pro Retina Early-2015 (Macbook12,1 or something) and installed Ubuntu. Had to use acpi=off and nodmraid just to get the USB stick to boot. I wanted to have ...
4
votes
1answer
999 views

Hyper-V Ubuntu initramfs on reboot

On the virtual machine when I update grub (sudo update-grub) and restart I get the BusyBox initramfs shell on boot. I have a checkpoint on the machine so I can easily go back to just before I ran the ...
4
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0answers
1k views

update-grub shows “No volume groups found”

Whenever I run sudo update-grub in a terminal, I get the following output: Generating grub configuration file ... Found background image: /usr/share/images/desktop-base/desktop-grub.png Found ...
4
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2answers
2k views

Ubuntu installation VS UEFI on Dell XPS 13 9343

I have heard that there are problems with Ubuntu on the Dell XPS 13 9343, however - I cannot even make the boot menu pop-up when booting from an installation pendrive (lastest Ubuntu, lastest ...
4
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0answers
1k views

cannot add memtest86 in Grub menu

I had already seek solution in: How can I add the Memtest86+ options back to the Grub menu? Memtest86+ options are missing in Grub menu However, they still can't solve my problem... what drives me ...
4
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1answer
1k views

Gave Up Waiting For Root Device - Fresh Install 14.04

I am getting the error: Gave up waiting for root device. Common problems: - Boot args (cat /proc/cmdline) - Check rootdelay= (did the system wait long enough?) - Check root= (did the system ...
4
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0answers
2k views

Reinstalling Grub - shows no volume groups found, how do you fix this?

I have a full backup which I had restored onto a new built system on Ubuntu 12.04 The backup did not include /dev /proc /sys folders. Upon rebooting, the grub show the following errors error: no ...
4
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4answers
5k views

Black screen when trying to install ubuntu 13.10

I am in need of some help. It has been 2 weeks since I bought my first ever windows laptop with the aim of replacing windows but I have been unsuccessful. The hardware is as follows : Asus 15' F550D ...
4
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0answers
465 views

Kernel panic after updating to linux kernel 3.8.0-32

I'm getting the following errors after upgrading to the newest kernel: VFS: Cannot open root device "UUID=1f09d896-51ad-47b8-8e62-c289906e527a" in unknown-block(0,0) Please append a correct "root=" ...
3
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0answers
132 views

Ubuntu 18.04.2LTS very slow to boot

My system has become very slow - it used to boot in 15 secs. Now it takes more than 3 minutes to boot. I've a dell with dual boot (ubuntu and windows) I have been reading about swap disk allocation ...
3
votes
0answers
93 views

Added nouveau.modeset=0 now black screen and nothing

Running Ubuntu 18.04.2. My system is crypt. I was having an issue where Ubuntu didn't seem to be waking up after screen idle timeout and lock. I would have to hard crash the system and then reboot. ...
3
votes
1answer
557 views

Ubuntu external SSD not booting on my desktop, but works on my laptop

I've installed Ubuntu 18.04 successfully onto an external Samsung T5 SSD and it works well with my laptop (ASUS UX303UB: https://www.asus.com/Laptops/ASUS-ZenBook-UX303UB/ ). However, when I try to ...
3
votes
0answers
91 views

How can I clone my installation to a btrfs partition and make it bootable?

I'm trying to copy all files, configuration, everything, to a new btrfs partition without reinstalling. So far, what I've tried is to go to a live cd session (which is actually booted from an iso ...
3
votes
1answer
668 views

Regenerate BIOS boot partition

I deleted BIOS boot partition, and GRUB won't boot. I can boot via supergrubdisk , but it's not solve. Can I regenerate it? (Without system reinstalling)
3
votes
0answers
680 views

Ubuntu 18.04 very long boot (SSD)

I have some troubles with Ubuntu 18.04 (it installed with windows, but I not using it) and decided to install another linux distro (Manjaro, installation EFI). Installation was success, but manjaro ...
3
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0answers
2k views

Howto Enable Hibernate on Ubuntu 18.04

How do you enable hibernate on Ubuntu 18.04? My system is an ASUS Z10PE-D16, ASSUS Geforce GTX 1080TI TURBO, 128 GB memory Multiple disks. Installed Ubuntu Desktop 18.4 Found https://help.ubuntu.com/...
3
votes
1answer
822 views

Windows 10 won't show up after installing Kubuntu 18.04

I've been trying to fix this issue for the past few hours now. I had kubuntu 17.10 installed before updating to 18.04, and before that ubuntu 16.04, and both recognized windows 10 in the grub menu, ...
3
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2answers
244 views

Can booting Windows from GRUB cause BSOD?

Since installing Ubuntu 16.04 as a dual-boot setup with Windows 10 I'm having frequent blue screens of death in Windows (about 5 per day). All the error codes are related to a problem in Windows ...
3
votes
2answers
998 views

Change partition sizes of dualboot system

I know that there are some similar topics to this, however I was not sure which of them could be applied to my case. Because I am afraid of destroying my system, I hope you can give me some advice on ...
3
votes
1answer
131 views

Grub2 crash on Lubuntu 17.10

I’ve had this issue for about a week, and all the basics have been tried. The core of the issue may be Acer having messed up (according to the boards I’ve read) on the BIOS. I’m in UEFI and there is ...
3
votes
0answers
145 views

Dell Precision 5510 Boot Partition Deleted?

While wanting to format my SD-card of 4gigs I accidentally removed a 4gig partition on my main drive in GParted. The system obviously wouldn't boot anymore. Not even showing Grub. I tried the ...
3
votes
0answers
670 views

Want rEFInd to boot into grub after selecting Linux from rEFInd

I saw, of course, the extensive documentation on Rod Smith's website, and understood most of it, and have searched online Set up rEFInd to boot Ubuntu directly (no Grub menu displayed) etc but can't ...
3
votes
0answers
311 views

Black Screen of Death question on a Dell Inspiron 7348 2-in-1

So, I've been searching for a solution to this issue. I've been scouring forums looking for an answer to my black screen of death problem. I have an Dell Inspiron 7348 2-in-1. Currently this is ...
3
votes
1answer
416 views

Invalid partitions table! after deleting fully encrypted ubuntu disk and install ubuntu over it

I've had ubuntu installed as fully encrypted disk and decide to delete and install normally. After I did that, I got the Invalid partitions table! error and can't boot. I have done this using live CD ...
3
votes
0answers
1k views

Ubuntu 16.04 does not install working UEFI when installing on external drive (no /EFI/BOOT/*.efi in EFI partition), how to properly solve?

My hard-drive on Ubuntu running laptop died because of age and extensive use in the past, but before it died completely I managed to create persistent live-usb pendrive to use as temporally system. ...
3
votes
2answers
2k views

PC Stuck on GRUB screen

So basically I had Windows 10 and Ubuntu 14.04 installed on a dual boot using grub. I decided I didn't want ubuntu any more so I deleted the Linux hard drive partitions out of my disk manger on ...
3
votes
0answers
766 views

Normal boot hangs on “Scanning for BTRFS files systems” after conversion from ext4

I have a headless server with an installation of Ubuntu 16.04. The default installation comes with an ext4 file system and reinstalling it from scratch is not possible, but I need the snapshot and ...
3
votes
1answer
928 views

LUKS passphrase screen does not show up

I installed Ubuntu with a fully LUKS encrypted LVM. It works fine with one issue: After selecting Ubuntu in Grub while booting, the "enter passphrase to unlock disk" screen does not show up. I can (...
3
votes
0answers
618 views

Arrow keys doesn't work in GRUB

When I boot my machine I come to the GRUB menu that lists Ubuntu 16.04 and three other headings under that, one of which is Windows 10. When I try to use my arrow keys to move down the menu the ...
3
votes
1answer
2k views

Kubuntu and UEFI

I am new to Linux and I just installed Kubuntu. I also have Windows 10 installed. Everything works fine so far but the only problem is the way in which I have to chose which OS starts. Right now I ...
3
votes
2answers
327 views

Grub doesn't recognize Windows 8

I have set up Ubuntu using this guide. Everything worked completely fine, but Grub wouldn't show Windows 8 in it's menu. So I googled a solution, and found+used boot-repair. Even after the fix, ...
3
votes
1answer
2k views

sudo update-grub doesn't work

When I run sudo update-grub, I get the below error: /usr/sbin/grub-mkconfig: 2: /etc/default/grub: /boot/grub/grub.cfg.: not found I have checked and can confirm that the /boot/grub/grub.cfg file ...
3
votes
1answer
1k views

Select at boot time, from Grub, Nouveau or Nvidia driver

I have a laptop MSI GS60 6QE; CPU is Skylake I7-6700HQ and GPU NVIDIA GTX 970. I had installed Ubuntu 16.04 on it and is working quiet good. I've installed NVIDIA 364.19 driver from ppa.launchpad.net/...