The details in the installer syslog show:
Mar 26 23:53:05 ubuntu grub-installer: Instalando para plataforma x86_64-efi.
Mar 26 23:53:06 ubuntu kernel: [ 6272.712620] FAT-fs (sda1): error,
fat_get_cluster: invalid cluster chain (i_pos 0)
Mar 26 23:53:16 ubuntu grub-installer: grub-install: error: no se puede abrir
«/boot/efi/EFI/ubuntu/grubx64.efi»: Error de entrada/salida.
Mar 26 23:53:16 ubuntu kernel: [ 6282.150719] FAT-fs (sda1): error,
fat_get_cluster: invalid cluster chain (i_pos 0)
Mar 26 23:53:16 ubuntu grub-installer: error: Running 'grub-install --force
"/dev/sda"' failed.
It looks like the installation failed because your EFI System Partition,
/dev/sda1, which is a FAT filesystem shared between Windows and Ubuntu,
has corruption. You can try rebooting to Windows and making sure you
shut the system down cleanly, then try to reinstall, and see if that
fixes the problem. Or, from the Ubuntu live environment, you can try
running these commands from a shell:
sudo umount /boot/efi
sudo fsck.vfat /dev/sda1
sudo mount /boot/efi
and then retry the installation to see if it succeeds.
The 'fsck.vfat' command may ask you for permission to make changes to
the filesystem to correct the errors that it finds. Please note that,
depending on the nature of the corruption it detects, this has the
potential to make your Windows system unbootable afterwards.
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Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1869278
Title:
grub-install /dev/sda failed during installation
To manage notifications about this bug go to:
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