Durante a atualização para o Ubuntu 16.10 a partir de 16.04, ele mostra a mensagem de erro, mas eu o ignorei.
depois de instalar o sistema mostra mensagem de erro quando eu digito
sudo apt-get upgrade
os resultados e a mensagem de erro
Reading package lists... Done
Building dependency tree
Reading state information... Done
Calculating upgrade... Done
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
2 not fully installed or removed.
After this operation, 0 B of additional disk space will be used.
Do you want to continue? [Y/n] y
Setting up shim-signed (1.21.3+0.9+1465500757.14a5905.is.0.8-0ubuntu3) ...
Installing for x86_64-efi platform.
grub-install: error: cannot find EFI directory.
dpkg: error processing package shim-signed (--configure):
subprocess installed post-installation script returned error exit status 1
Setting up grub-efi-amd64-signed (1.74+2.02~beta2-36ubuntu11) ...
grub-install: error: /usr/lib/grub/i386-pc/modinfo.sh doesn't exist. Please specify --target or --directory.
dpkg: error processing package grub-efi-amd64-signed (--configure):
subprocess installed post-installation script returned error exit status 1
Errors were encountered while processing:
shim-signed
grub-efi-amd64-signed
E: Sub-process /usr/bin/dpkg returned an error code (1)