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I have installed Kubuntu over another distro in a system with dual boot Windows / Kubuntu , and now Kubuntu starts directly with no grub for dual boot.

I had to install it in EFI because installer warned me about that issue. I used Boot Repair and here is the Pastebin: http://paste.ubuntu.com/p/9S82qs2fd3/

Boot-Repair also says this when I Try to repair the grub:

GPT detected. Please create a BIOS-Boot partition (>1MB, unformatted filesystem, bios_grub flag). This can be performed via tools such as Gparted. Then try again. Alternatively, you can retry after activating the [Separate /boot/efi partition:] option.

(not sure how to do that)

I have tried this: https://pastebin.com/artMiLjP

But it doesn't work.

If I use sudo os-prober into a Live Boot Repair console, appears:

/dev/sda1:Windows 10:Windows:chain
/dev/sdd3:Ubuntu 18.10 (18.10):Ubuntu:linux
/dev/sde1:Windows 10:Windows1:chain

But if I use it booting from my new Kubuntu, there is not output:

slamelov@Kubuntu-Ultra:~$ sudo os-prober
slamelov@Kubuntu-Ultra:~$
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Try this one:

# update-grub

or

$ sudo update-grub

# - it means Superuser

  • It does not work <br> 'Generando un fichero de configuración de grub... Encontrada imagen de linux: /boot/vmlinuz-4.18.0-13-generic Encontrada imagen de memoria inicial: /boot/initrd.img-4.18.0-13-generic Encontrada imagen de linux: /boot/vmlinuz-4.18.0-10-generic Encontrada imagen de memoria inicial: /boot/initrd.img-4.18.0-10-generic Añadiendo menú de entrada de inicio para la configuración del firmware EFI hecho' – Slamelov Jan 14 at 20:18

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