Unable to change grub menu entries because of grub customizer not working

[Falav]

Wow do you imagine the time it would take? There are hundreds or thousands Arch developers, Manjaro maybe a dozen in total. Repackage everything…

Moreover, this is not the AUR, everything is already packaged. No need to recompile.

Manjaro halts the stream of packages though, as you already know, stable, testing, unstable.

[Ben]

There are actually a LOT of packages that won’t even install or build - when they’re flagged and reported they get attention.
We had this issue looking recently at DICOM viewers, in the repos they’re mostly not even working…

Sometimes software is simply limited in use, sometimes it over-extends itself, sometimes it represents a heck of a lot of work and complexity to manage a very simple task.

Just bloat really adding layers of complexity to a fairly simple operation - and when it fails, you bricked your computer.

[Zesko]

How to reset the “default” GRUB after removing grub-customizer

1. Remove grub-customizer
2. sudo mv /etc/grub.d /etc/grub.d.old
3. sudo rm -rf /etc/grub-customizer
4. Reinstall grub
5. sudo update-grub
6. reboot
7. If it works fine, then you can delete the old directory /etc/grub.d.old.

If you want to change grub menu, then:

1. Create new backup of the file grub.cf
sudo cp /boot/grub/grub.cfg /boot/grub/grub.cfg.backup
2. Edit this file:
   sudo nano /boot/grub/grub.cfg
   You can change, move or delete codeblocks of grub entry menuentry '...', what you want.

menuentry 'Windows 10'   --class windows  ..... {
          ....
}

menuentry 'Manjaro Linux' --class manjaro .... {
          ...
}

It works for me.

If the editing of grub.cfg went wrong, you can run sudo update-grub or sudo grub-mkconfig that automatically regenerates grub.cfg.

If grub menu is empty or boot error, you need boot into a Manjaro LIVE ISO on USB to fix your system. Run the command:
sudo manjaro-chroot [mount with your system partition]
Password: manjaro
Run sudo update-grub or sudo grub-mkconfig

It is easy for me.