Not sure how to answer this. The system worked before mis-fortunately pressing upgrade to 16.04 what happened next was done by the installer and packages so as a user there is very little to do about this.
Anyway here is how my "du /boot" looks like: 4 /boot/efi/EFI/ubuntu/fw 72 /boot/efi/EFI/ubuntu 76 /boot/efi/EFI 80 /boot/efi 3284 /boot/grub/x86_64-efi 2352 /boot/grub/fonts 20 /boot/grub/locale 8080 /boot/grub 166988 /boot -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1574104 Title: grub-install: error: cannot find EFI directory. package shim-signed 1.12+0.8-0ubuntu2 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/shim-signed/+bug/1574104/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
