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".

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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,
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5k views

Why “maybe-ubiquity” on default kernel command line?

On Ubuntu Server 18.04.03 LTS, fresh install, I wanted to do edit some kernel command line settings. In /etc/default/grub, I found the following set: GRUB_CMDLINE_LINUX_DEFAULT="maybe-ubiquity" I'm ...
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2k views

Permanently solve “GRUB was previously installed to a disk that is no longer present”

I have an Ubuntu 16.04 virtual machine (local, no cloud) which was created as a clone of another computer. Each time GRUB packages are upgraded using apt upgrade, I get the following message:1 The ...
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0answers
2k 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. ...
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0answers
288 views

Can't Boot on Dual Monitor

Summary of issue: Can't see GRUB2 boot menu on monitor connected via DVI port. Up until recently I had everything working fine for my Windows 10 / Ubuntu 18.04.2 dual boot setup. I had two monitors: ...
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 ...
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2answers
610 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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1answer
128 views

Cannot install Ubuntu 20 on laptop with windows 10 and NVIDIA Geforce RTX 2080

I have laptop with NVidia Geforce RTX 2080 and Windows 10 installed, and I would like to install second OS, latest Ubuntu 20, but I am not able. Black Screen after launching Grub option "Ubuntu&...
5
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1answer
3k views

Error installing boot-repair on ubuntu 19.10

I am with problems on grub boot initializer. When I go install the boot-repair via live CD to Ubuntu 19.10, I am getting the follow error. ubuntu@ubuntu:~$ sudo apt install boot-repair Reading ...
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1answer
1k 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. ...
5
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1answer
216 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 ...
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186 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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10k 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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1answer
2k views

boot XEN under UEFI-only BIOS

Is there a way to get XEN 4.4 booting from UEFI mode BIOS? My AMD64bit laptop does not support direct CSM/legacy boots. A nasty workaround has been to boot from a specially made USB pendrive with ...
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3answers
11k 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 ...
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1answer
17k 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 ...
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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 ...
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8answers
37k 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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0answers
173 views

Remove grub2 core.img (having 2) and resize /boot/efi

Some time ago I installed ubuntu alongside with win10. I am a total newby, so please excuse my maybe stupid questions. I think I might have done some mistakes while installing ubuntu. I fact, I had ...
4
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1answer
378 views

18.04, grub takes about 6 minutes to boot, problem: `systemd-udevd 'SomeDevice' is taking a long time`

after a whole system update (that I try to avoid usually), I thought I was unable to boot, but this time I decided to wait more. so after exactly 6m05s (everytime is that precise delay) it finally ...
4
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0answers
1k 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. ...
4
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1answer
4k 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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2answers
3k 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 ...
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0answers
815 views

Ubuntu/Win10 Dual Boot - Can't boot into Windows from GRUB

I'm running a (K)Ubuntu 17.10 and Windows 10 Dual Boot. I can boot into Windows if I choose the corresponding entry in the UEFI Boot Menu, however I can't boot Windows from GRUB. It is correctly ...
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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
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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 ...
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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
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1answer
1k 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
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1answer
1k 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 ...
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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 ...
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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 ...
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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 ...
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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
495 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=" ...
4
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1answer
12k views

Unable to unlock encrypted Ubuntu 16.04

I checked the encrypted option when I installed Ubuntu 16.04 yesterday just to explore other features. The installation is very fresh. When I boot my PC it asks for my password to unlock the OS. The ...
3
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2answers
216 views

Dualboot broken after Upgrading to Ubuntu 20.04

Yesterday I upgraded from Ubuntu 18.04 to Ubuntu 20.04 and since then my laptop is just booting to Ubuntu at startup, instead of grub asking for Ubuntu or Windows 10. I have tried to reinstall grub ...
3
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0answers
3k views

Ubuntu 20.04 in Hyper-V Enhanced Mode

I have a 19.10 Virtual Machine wich runs in Enhanced Mode, i.e. Full Screen, Shared Folders etc. However I have done a Quick Create of a 20.04 installation and the Gnu Grub screen does not bring up ...
3
votes
1answer
86 views

how to merge boot partition with other partition separated by a grub2 partition

I have a machine where due to its history the grub partition sits between two large ext4 partitions, all seen in the picture below. I would like to merge the two partitions which currently sandwich ...
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0answers
226 views

Logo manufacturer appears twice when booting

I got strange thing when booting with my laptop Acer Helios 300 2019: I have just installed new Ubuntu 18.04.4 LTS on a new SSD. During the process installing on the SSD, I didn't format the existing ...
3
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0answers
115 views

GRUB freezes when I reboot with usb mouse connected

I'm running EFI dual-boot with windows 10 and Ubuntu 20.04. HP Spectre with NVIDIA graphics card. The problem only happens if I boot up and there is a flash drive or any device connected to the USB ...
3
votes
2answers
470 views

Problem with dual booting windows 10 and Ubuntu 16.04

A little background before I go into the main problem - I have windows installed in a 256GB nvme ssd that came with the laptop. Then I added a 2.5" SSD manually (Samsung Evo 860) for additional space ...
3
votes
1answer
2k views

19.10 usb installer boot fail

I have a Dell 9570 XPS laptop with latest BIOS (1.13.0) and I am trying to do a clean install of Ubuntu 19.10 from a flash drive. It is failing from two flash drives, one USB and one USB-C, with these ...
3
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0answers
40 views

Ubuntu freezing during startup

Ubuntu 18 and Windows are installed as dual boot on my Acer Aspire F15 laptop. Since today my PC freezes completely when restarting, approximately 20 seconds after the grub screen to choose OS, ...
3
votes
1answer
271 views

dpkg --configure causing endless sourcing of /etc/default/grub

I'm at my wits in with this "bug" .. I can't update anything! This is what my Terminal looks like: .. nokkie@HomeBase:~$ sudo dpkg --configure -a [sudo] password for nokkie: 'Setting up friendly-...
3
votes
0answers
166 views

Fail to boot, suspect filesystem problem

I have a Asus UX305F which has been dual booting Ubuntu 18.04 and Windows successfully using GRUB. Today I started my computer, and it hung on the Ubuntu loading screen for 15 minutes so I hard ...
3
votes
0answers
458 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
1answer
392 views

How can I disable overlayroot via ssh?

I have a remote computer protected with overlayroot. Currently, I write "overlayroot=disabled" in grub boot to disable it until it is rebooted, but sometimes I want to make changes using SSH. Is there ...
3
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0answers
1k views

18.04 Boot to black unless I delete $vt_handoff grub parameter, related to Nvidia drivers?

I started having problems booting after I tried to use prime-select for the first time to switch between my laptop's Nvidia GTX 960M and Intel graphics, using the same nvidia-390 driver that had ...

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