Preparando para desempaquetar .../libexif12_0.6.21-2ubuntu0.1_amd64.deb ...
Desempaquetando libexif12:amd64 (0.6.21-2ubuntu0.1) sobre (0.6.21-2) ...
Procesando disparadores para libc-bin (2.23-0ubuntu11) ...
Configurando grub-pc (2.02~beta2-36ubuntu3.22) ...
(EE) 
Fatal server error:
(EE) Server is already active for display 0
	If this server is no longer running, remove /tmp/.X0-lock
	and start again.
(EE) 
(EE) 
Please consult the The X.Org Foundation support 
	 at http://wiki.x.org
 for help. 
(EE) 
/var/lib/dpkg/info/grub-pc.config: 28: /etc/default/grub: want: not found
dpkg: error al procesar el paquete grub-pc (--configure):
 el subproceso instalado el script post-installation devolvió el código de salida de error 127
Configurando friendly-recovery (0.2.31ubuntu2.1) ...
(EE) 
Fatal server error:
(EE) Server is already active for display 0
	If this server is no longer running, remove /tmp/.X0-lock
	and start again.
(EE) 
(EE) 
Please consult the The X.Org Foundation support 
	 at http://wiki.x.org
 for help. 
(EE) 
/usr/sbin/grub-mkconfig: 28: /etc/default/grub: want: not found
dpkg: error al procesar el paquete friendly-recovery (--configure):
 el subproceso instalado el script post-installation devolvió el código de salida de error 127