Score:0

No GRUB boot menu after installing Kubuntu 20.04

in flag

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.

oldfred avatar
cn flag
Grub customizer replaces grub scripts with its own proxy versions. Do not know Grub customizer. May be better to just totally reinstall grub-efi-amd64. But if you have made changes to /etc/default/grub, you may want to back that file up. If you only have one system (or only one seen), you do not get a grub menu. Also they are turning off os-prober, you may need to manually turn it on, update grub & then turn it off for security reasons. Os-prober now turned off by default Dec 2021 https://ubuntuforums.org/showthread.php?t=2469993
Score:0
in flag

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!

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