Public bug reported: System was working fine, just upgraded to 16.04. There were errors during installation and apt now reports that shim-signed isn't properly installed with error grub-install: error: cannot find EFI directory.
> sudo apt-get install shim-signed Reading package lists... Done Building dependency tree Reading state information... Done shim-signed is already the newest version (1.12+0.8-0ubuntu2). 0 to upgrade, 0 to newly install, 0 to remove and 0 not to upgrade. 1 not fully installed or removed. After this operation, 0 B of additional disk space will be used. Do you want to continue? [Y/n] Setting up shim-signed (1.12+0.8-0ubuntu2) ... 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 Errors were encountered while processing: shim-signed E: Sub-process /usr/bin/dpkg returned an error code (1) > lsb_release -rd Description: Ubuntu 16.04 LTS Release: 16.04 > apt-cache policy shim-signed shim-signed: Installed: 1.12+0.8-0ubuntu2 Candidate: 1.12+0.8-0ubuntu2 Version table: *** 1.12+0.8-0ubuntu2 500 500 http://gb.archive.ubuntu.com/ubuntu xenial/main amd64 Packages 100 /var/lib/dpkg/status I've checked a couple of existing shim-signed bugs; they seem to focus on the /boot/efi directory being missing, but I have one: > du /boot/eft 4 /boot/efi/EFI/ubuntu/fw 72 /boot/efi/EFI/ubuntu 76 /boot/efi/EFI 80 /boot/efi/ > df /boot Filesystem 1K-blocks Used Available Use% Mounted on /dev/sdb4 28704764 8583044 18640556 32% / ** Affects: shim-signed (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1580217 Title: shim-signed only half-configured following ubuntu upgrade to 16.04 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/shim-signed/+bug/1580217/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs