Home / ubuntu / Questions / 1384133
Accepted
Martin Zeltin
Asked: 2021-12-29 06:05:37 +0800 CST

No GRUB boot menu after installing Kubuntu 20.04

  • 772

So I had Ubuntu 20.04 installed on my PC. Then I installed Kubuntu 20.04 alongside my Ubuntu. But after reboot the GRUB menu was not updated at all. It's like Kubuntu installation did not update my GRUB menu. I am using UEFI so maybe that is the problem? How do I add Kubuntu menu option to my GRUB now?

P.S. I tried Grub Customizer, but that did nothing.

boot

1 Answers

  1. Best Answer

    I finally fixed it, so I will share this with anyone else who might run into the same problem.

    Unfortunately, GRUB Customizer was no help to me. Even after I installed it to MBR and updated grub - it had no effect and my GRUB menu did not change at all.

    Then I noticed that there was a partition mounted on /boot/efi like this

    $ df -h

Filesystem    Mounted on
/dev/sda1    /boot/efi

    Then I created a new directory and mounted the /dev/sda1 partition there

    $ sudo mkdir /mnt/bootefi
$ sudo mount /dev/sda1 /mnt/bootefi

    And then installed GRUB on this new partition like this

    $ sudo apt install grub-efi -y
$ sudo grub-install --efi-directory=/mnt/bootefi

    After rebooting, finally my GRUB was updated and I saw my new Kubuntu entry!

    • 0