Questions tagged [grub2]

Grub2 is Grub version 2, a multiboot bootloader from the GNU project.

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GRUB slow/irresponsive when in UEFI bios mode

I have a GTX 1060 GPU, a ultrawide (21:9) 2560x1080 monitor and a MSI B-450 A PRO motherboard (bios version V10.C - 2019/11/12). Recently i've change the bootmode of my bios from CSM to UEFI. after ...
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16 views

black screen flickering after grub menu

One time, after starting my system from sleep, it went complete black, couldn't even start a tty also and had to force shutdown. And after restarting it, the screen flickers after loading bootloader ...
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21 views

Grub Not showing any OS and no options will open

I am receiving this error when I open any option that isn't sub-menus "error symbol grub_file_filters not found" I tried dual booting parrot os and then when restarting grub came up but no OS.
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upgrade grub tty ncurses prompt trying to install to partition instead of drive, is this right?

I did sudo aptitude full-upgrade -y in tty2 to upgrade. I stopped because I see at the ncurses prompt that aptitude is trying to install to partition instead of drive's MBR, and grub-install always ...
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45 views

How may i move windows 10 to a folder and boot it from there?

What's needed to enable multiboot of more than one windows 10 install without needing any additional partitions?  i imagine it might be possible by booting into something else and moving a list of ...
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not able to boot into windows 10 after installing kali in dual boot mode

I have installed kali linux 5.4.0 with qindows 10. But from grub i am not able to boot into win10. If I click on win10, it is coming back to grub. If I change boot mode to "UEFI" then it is not ...
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32 views

EasyBCD Boot Device different to Windows Boot Manager device

Can someone explain why EasyBCD has a different Boot Device to the Windows Boot Manager device? My drives use MBR (not GPT). BCDedit shows this at the beginning: Windows Boot Manager ----------------...
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1answer
143 views

How to UEFI dual boot Windows 10 and Ubuntu?

TL;DR: In a Windows 10 / Ubuntu UEFI dual-boot scenario, booting Windows 10 from Grub causes Windows Boot Manager to overwrite / remove Grub. How can I stop this from happening? My PC has been ...
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131 views

How can I configure Windows 10 EFI/Bootloader?

I am currently using a dual-boot setup with Windows 10 and Linux, which were on the same physical drive until today. I just purchased a new drive, and decided to move my Windows partition to the new ...
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71 views

grub.cfg not working properly

I'm trying to give users the option to run memtest from a grub2 menu in a custom iso. I'd also like to give them the option to set screen resolution. Neither one works as currently configured. Grub....
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26 views

Batch file to boot into grub2

I want to make a desktop shortcut on windows 10 to boot directly into grub2 using a batch file or any other way how do I do that
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RHEL8 grubx64.efi displayed as Windows Boot Manager in efibootmgr

TLDR: efibootmgr shows redhat grubx64.efi file under windows boot manager. I run a multiboot system (RHEL8, Ubuntu 18.04, Win10) with individual linux boot partitions on the SSD, boot managers co-...
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190 views

GRUB with higher resolutions - really slow

My monitor's native resolution is 4k. However, when I run GRUB in 4k (or even at something around 720p), it is extremely slow (about 1 second lag between keyboard events and reaction on the screen). ...
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537 views

How to get legacy bios to load uefi bootloader?

I have a liveusb, it currently works on an uefi computer. I encountered more and more computers which are uefi only and which are configured to boot only from gpt with password locked bios. But in the ...
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Why is my screen blank when starting CentOS?

Screen blank when booting up CentOS 2.7 GRUB. During the booting process, I see activity scrolling down the screen. Then my screen goes blank. I have a NIVIDIA graphics card, which may be causing the ...
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Is it possible to add a wait time to GRUB?

Is it possible to add a wait time to GRUB? After selecting an entry GRUB should wait for x seconds and then continue. This should survive a update-grub, so preferrably an entry in default/grub. So ...
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grub2 gone after ubuntu upgrade - reinstallation confusion

i have been dual booting windows 10 and ubuntu for a while, i just distro upgraded the ubuntu system to 19.10. but now the grub is gone. I installed windows first and then ubuntu. i coudl let it ...
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35 views

Exiting grub pager

I have turned on pager and debug for grub in grub.cfg set pager=1 set debug=all Now i'm stuck with long output that grub produces. How can I quit that? I tried using CTRL+D, CTRL+C, ESC, q, but ...
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How to create RAID1 on working Slackware 14.2?

I use Slackware 14.2 (with kernel 4.4.14-smp) on sda and I'm trying to create the RAID 1 with additional sdb. I'm using the VM VirtualBox. First, I have cleaned the sdb: dd if=/dev/zero of=/dev/sdb ...
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Multiple Linux (Debian/Ubuntu 2018/2019, CentOS, Fedora) grub2 2.04 Installation and Booting Problems

First, I have some strategic questions: The Ubuntu installers automatically invoke grub-install in UEFI mode on UEFI hardware, even if I want to install grub2 on an external SSD. Can I avoid this, i....
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grub boot loder gone, have aceess to only Windows boot, how to fix it?

For reasons unknown, the grub2 bootloader doesn't load at all although the windows boot loader loads. You can see how the windows partition manager shows the linux partitions but is unable to show ...
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33 views

Reinstall GRUB2 for an encrypted filesystem (single-boot)

I have Ubuntu 19.04 and I followed the steps in How to reinstall GRUB2 EFI? to fix my bootloader After updating the GRUB I got a warning, but the boot menu entry for my broken system is added: $ ...
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Booting Ubuntu installer DIRECTLY from grub2

Before I get into my question, a quick note: I've tried 6 different utilities to do this automatically and they didn't work properly - don't recommend anymore please - I'm asking specifically how this ...
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13 views

Execute script with networking before booting Linux

I would like to have my Linux systems use hard disks that are encrypted, and can be decrypted with some sort of key in Active Directory. I would like the system to prompt for a username and password ...
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1answer
239 views

Howto boot live usb from UEFI or GRUB2?

After the 1903 upgrade to Win10, my Thomson NEO notebook started playing up - progressively complicated boot up. To cut a long story short, log files show that 4 ms files are corrupted. Now, it boots ...
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329 views

Boot device not found hard disk (3F0) HP with Debian 10

I have an HP Pavilion power 15-cb030nl with Debian 10 buster installed. Several months ago I changed the SSD with a larger one, cloning the entire system (there was debian 9 on it) using clonezilla. ...
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1answer
639 views

How to fix the Grub2 Menu to have a correct Dual Boot Windows-Linux?

I have Windows 10 and I previously had installed Zorin distro and worked fine. Then I deleted from Disk Management in Windows the previous partition where Zorin (Ubuntu-like distro) was installed and ...
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15 views

How to figure out which partition parrot os is installed in?

I installed parrot os a year ago and one day my BIOS got flashed when my computer was updating. Now I need to use live mode to install Grub2 but I don't know which partition has parrot os is installed ...
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1answer
55 views

How is kernel loaded from .vmdk image?

I am using poky at warrior branch to generate root images. Yocto can generate the final image in various formats. One of them is .hddimg, which looks like this when extracted: EFI bzImage initrd ...
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14 views

GRUB doesn't display anything

Trying to install linux on a new laptop from a Live USB. USB stick works fine in other machines. Disabled SecureBoot and FastBoot, enabled CSM and legacy support, can see USB stick in boot menu but ...
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1answer
443 views

Grub2 Not Recognizing EXT4 File System

I am trying to make a bootable kali linux usb and have it working for legacy bios computers. However, uefi is causing some trouble. The usb is split up into 3 partitions. The first is the efi/boot ...
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24 views

How to install Linux alongside Windows 10 with a corrupted Grub?

I had Windows 10 and Linux Mint in dual boot. I deleted from Windows 10, the partition related with Linux since it had some issues. Then after I reboot I see a grub window like below I want to ...
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586 views

Unable to skip Grub v. 2.02 boot menu on Ubuntu 18.04

I have one OS on my Lenovo Flex 5 15 - ElementaryOS 5 (just one of many distributions based on Ubuntu 18.04). When I turn my laptop on, Grub v. 2.02 boot menu appears and I have 30 seconds to choose (...
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37 views

How to replace graphical boot menu via text boot menu in Debian 10 on amd64?

My /etc/default/grub contains # Uncomment to disable graphical terminal (grub-pc only) #GRUB_TERMINAL=console I use a year-2012 laptop with kernel 4.19.0-5-amd64 and Debian 10 on it. I have the ...
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1answer
450 views

Arch Linux: booting in blind mode UEFI

I recently installed Arch on an old box for someone else, and I'm running into a problem: I am booting to a GRUB shell, and when I manually load the kernel with linux /boot/vmlinuz-linux and initrd /...
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1answer
400 views

My laptop keyboard doesnot work in GRUB 2.0.2 ! Arrow keys not working in GRUB

Arrow keys does not work in GRUB menu. So i get redirected to UBUNTU 18.0.4 Login page after 10s. I could not find any solution for this problem as the people generally have problem with their usb ...
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2answers
72 views

Booting to Windows with broken GRUB

I installed Ubuntu on my Windows 10 system, to dual boot with GRUB. Ubuntu and GRUB were installed on a separate drive from the main Windows drive. Later on, I did not need Ubuntu on my system ...
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1answer
134 views

GRUB2 Edits Are Not Taking Effect

I have a laptop with UEFI firmware, but had to set the firmware to boot in CSM legacy mode so that I could boot from USB. I'm multi booting three different linux distros, two of them are Ubuntu. The ...
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1answer
550 views

BIOS/UEFI Multiboot Suggestions

I do a lot of tech work, including building PC's and some file system repairs; re-installs. I'm looking to create a hybrid BIOS/UEFI thumb drive that has a vast collection of linux distro mini images ...
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1answer
95 views

Ubuntu moving grub

I need to expand partition with Ubuntu, but in the middle of the drive there is a boot partition. I tried using GParted but there's no option of realocating the grub2. I found some information on ...
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26 views

Wake on Lan ends in Grub's command line

Got an old Thinkpad Edge e130 with Fedora 30 on SSD (sdb), that I'd like to wake on Lan. It wakes up, but then hangs in Grub's command line. BIOS (uefi) only lets me select the whole disc for wake on ...
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207 views

UEFI Dual Boot Windows 10 & DebianTesting

I know I am probably making a duplicate. But there are so many duplicates already that finding an answer to my specific questions will take hours. If not more. I tried. So I succeeded in the dual ...
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32 views

How yum updating grub

When i run: yum update Its update Linux kernel bringing the newest available one, and after rebooting, I find the new kernel listed in grub boot menu, technically which tool written it? is it part ...
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1answer
735 views

systemctl hibernate AND reboot?

I have two Linux images on different volumes and a /boot partition that is separate from both of them. I want my users to be able to hibernate their 'desktop Linux OS' at night, rebooting into the '...
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41 views

Grub2 won't install

So I tried to download and install Ubuntu 18.04 on my asus 2-in-1 Laptop (Asus t100tam) I got it to boot into Ubuntu after adding a bootia32.efi file to /efi/boot after flashing with rufus with gpt ...
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604 views

Trying to install Gentoo Linux, stuck at GRUB

I am trying to install Gentoo Linux, following the instructions on their website, but I cannot go beyond a GRUB prompt. I downloaded the "Minimal Installation CD" ISO, AMD64, 2019.04.21, and burned ...
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1k views

I can't get GRUB to load the kernel in my os

I am trying to make my own OS without using linux. I followed this tutorial on: http://www.cplusplus.com/articles/zv07M4Gy/ I did everything and I made the iso file, put it into VirtualBox and it ...
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1answer
564 views

Computer boots normally instead of to USB, ignoring BIOS boot order

I have both an Ubuntu 18.10 and a Windows 10 bootable USB drive. I used them to install both operating systems on the same laptop for dual boot. In order to select which one I boot to, I'm using the ...
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1answer
54 views

Phantom unreadable drives, hd0 through hd4, are causing errors

In Grub, in addition to hd5, which is my actual drive, there are hd0 through hd4. Trying to ls them says they have an unknown filesystem. When grub loads, it prints several pages of error: failure ...
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224 views

Corrupt Superblock in /dev/sda

I ran into grub rescue mode this morning and I tried to fix it with live USB, but after running lilo -M /dev/sda mbr when I boot with live usb again, I get these errors before booting successfully: ...

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