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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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 ...
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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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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
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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: ...
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3answers
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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 ...
6
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1answer
12k 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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3answers
452 views

ZFS doesn't allow me to follow kernels with updates

I installed ubuntu 20.04 sometime in june. by now I'm updated to ubuntu 20.04.1 LTS there's been a few kernel updates. end everytime I run updates Zsys tries to put new kernel version as the first ...
6
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2answers
612 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
242 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&...
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1answer
1k views

Recovering a borked GRUB with a Ubuntu 19.10 ZFS root filesystem

After a series of mishaps with Secure Boot (trying to sign VMWare Player kernel modules), GRUB stopped showing the entries corresponding to Ubuntu 19.10, installed as ZFS root (default 19.10 installer ...
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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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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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1answer
2k 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
5k 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. ...
5
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1answer
248 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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0answers
215 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 ...
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 ...
5
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1answer
19k 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
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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
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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
195 views

Ubuntu 20.04 autoinstall fails when I try to set the storage

I want to do an Ubuntu 20.04 autoinstall from a separate partition. The block structure: sda | -- sda1 vfat /cdrom (iso image copied) - bootable | -- sda2 ext4 /var/crash (added by ubuntu) On ...
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0answers
8k 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 ...
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0answers
843 views

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

Some time ago I installed Ubuntu alongside Windows 10. I think I might have done some mistakes while installing Ubuntu. I fact, I had to install it twice and I might have done bad things to my ...
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2answers
2k 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 ...
4
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1answer
683 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 ...
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0answers
2k 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. ...
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4answers
6k views

Can't access bios, boot from usb, no grub, after installing Ubuntu 18.04 LTS

level not an expert in linux Dear all, I just installed ubuntu 18.04 on a ThinkCenter Lenovo M910x (SS HD) alongside windows 10. I did so using a usb stick (created using unetboot) and live mode. ...
4
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1answer
579 views

On a UEFI install, how to do Minimal, Minimal Virtual Machine, Expert install?

On the regular server installation boot screen, one can press F4 to enable Minimal or Minimal Virtual Machine options, and there is also an Expert install option. However, on a UEFI install boot ...
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0answers
1k 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

Adding a LUKS-encrypted OS to Grub?

I recently installed Debian (using an encrypted LVM) onto an NVMe drive. The /boot and EFI partitions are of course not encrypted. However, I discovered that my old, rickety motherboard I'm using ...
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0answers
3k 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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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
2k 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
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 ...
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 ...
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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
512 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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0answers
19k views

A Guide to Install Ubuntu 13.04 using a RAID 0

Getting the error: Unable to install grub in /dev/sda? Because you are using a BIOS/fakeRAID0? If you manage to find this thread consider yourself in luck. I spent the last 48 hours trying to figure ...
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
votes
0answers
28 views

Self-signed kernel loading stopped working after upgrade to 21.04

I have a strange problem with secure boot and self-signed kernels. On 20.10 I was able to boot (everything with Secure Boot) both canonical-signed and self-signed kernels. After upgrade to 21.04 ...
3
votes
1answer
122 views
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Is there a proper solution to “Keyboard and Mouse not working after boot” problem?

I recently replaced a smashed screen on a HP Spectre x360 G2, running Ubuntu 20.04LTS. However, after booting up again I had lost the use of the laptop's touchpad and keyboard (NB. devices still ...
3
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0answers
946 views

ACPI BIOS Error messages when booting Ubuntu 20.04

After upgrading my ASUS Zenbook UX305UA (Intel i5-6200) from ubuntu 18.04 to 20.04 (20.04.1 LTS to be specific) a couple of weeks ago, I am experiencing odd bugs. While odd green pixels like this were ...
3
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0answers
643 views

error: file ./boot' not found, after installing Ubuntu 20.04 on an external SSD

I've decided recently to install Ubuntu on an external SSD. I want to use it as a "work OS" that I could plug anywhere. After some research, I found that with usb 3.0 throughput, there are ...
3
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0answers
1k views

initramfs unpacking failed decoding failed: error after re-install Grub

I have dual boot windows/ubuntu. After trying to install new M.2 drive, I must have hit the CMOS or something and my RAID config got reset in my BIOS. So I enabled RAID again but my Ubuntu boot option ...

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