The error in your log is:
> Searching for GRUB installation directory ... found: /boot/grub
> /etc/default/grub: lĂnea 11: splash: orden no encontrada
> run-parts: /etc/kernel/postinst.d/zz-update-grub exited with return code 127
This shows that you have locally edited the /etc/default/grub file on
your system in a way that it is not a valid shell script fragment. You
will need to correct this in order for kernel upgrades to work correctly
on your system.
** Changed in: grub (Ubuntu)
Status: New => Invalid
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https://bugs.launchpad.net/bugs/1613464
Title:
package linux-image-extra-4.4.0-34-generic 4.4.0-34.53 failed to
install/upgrade: run-parts: /etc/kernel/postinst.d/zz-update-grub
exited with return code 127
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