Score:0

Dualboot not functioning properly (GRUB not launching?)

ua flag

I have Windows 10 installed on my computer, and I decided to dual-boot Ubuntu. I booted the Ubuntu 20.04.1 LTS installer from a 64-gigabyte SanDisk USB Flash Drive and proceeded through the steps of the installer. When I finished I rebooted my computer to find that GRUB isn't launching (I thought it would override the default boot manager), so I tried editing my BIOS boot order to find it but could not find it. So I booted into Windows to examine what had changed and found that a new partition was not created on my disk. I thought it was an error so I booted back into the Ubuntu installer and again proceeded through the steps until I landed upon this page:

https://i.stack.imgur.com/u7szw.jpg (I cannot post images yet)

I selected this option, and when it finished, I booted back into Windows to find the partition had been created, but still no GRUB, I also tried again to edit the boot options and change the BIOS, but still could not find GRUB anywhere.

My computer boots from UEFI, so I can't use something like EasyBCD to configure the boot options.

I am not too skilled in this area, so I would please like some assistance.

oldfred avatar
cn flag
What brand, model system? Some like Acer require "trust" setting in UEFI. Some like HP only let to change boot order in UEFI settings (not UEFI boot menu).
Score:0
sn flag

First, turn off fastboot in windows, then open the windows command line and run "bcdedit /set {bootmgr} path \EFI\ubuntu\grubx64.efi" without the quotes and reboot. You should then be good to go.

AregPrograms avatar
ua flag
Thanks! This seemed to work. It didn't work at first, but I just had to disable **Secure Boot** in my BIOS configuration.
Score:0
az flag

It looks like you have to install grub manually.

You can do this by booting into a Live CD or USB, mounting the root partition of the system that contains the GRUB bootloader, and then running the grub-install command. Specify the root partition.

grub-install /dev/sdaX

And then update the GRUB configuration.

Run update-grub

Then reboot the PC.

If you can't boot into the live boot device, you have to look into how to do that first.

I sit in a Tesla and translated this thread with Ai:

mangohost

Post an answer

Most people don’t grasp that asking a lot of questions unlocks learning and improves interpersonal bonding. In Alison’s studies, for example, though people could accurately recall how many questions had been asked in their conversations, they didn’t intuit the link between questions and liking. Across four studies, in which participants were engaged in conversations themselves or read transcripts of others’ conversations, people tended not to realize that question asking would influence—or had influenced—the level of amity between the conversationalists.