Preparing to unpack .../gdm3_3.24.1-0ubuntu0.1_amd64.deb ...
Unpacking gdm3 (3.24.1-0ubuntu0.1) over (3.24.0-0ubuntu2) ...
Preparing to unpack .../libgdm1_3.24.1-0ubuntu0.1_amd64.deb ...
Unpacking libgdm1 (3.24.1-0ubuntu0.1) over (3.24.0-0ubuntu2) ...
Preparing to unpack .../gir1.2-gdm-1.0_3.24.1-0ubuntu0.1_amd64.deb ...
Unpacking gir1.2-gdm-1.0 (3.24.1-0ubuntu0.1) over (3.24.0-0ubuntu2) ...
Processing triggers for ureadahead (0.100.0-19) ...
Processing triggers for libglib2.0-0:amd64 (2.52.0-1) ...
Processing triggers for libglib2.0-0:i386 (2.52.0-1) ...
Setting up shim-signed (1.28+0.9+1474479173.6c180c6-1ubuntu1) ...
Instalando para plataforma x86_64-efi.
grub-install: error: no se puede encontrar el directorio EFI.
dpkg: error processing package shim-signed (--configure):
 subprocess installed post-installation script returned error exit status 1