Public bug reported:
I upgraded from 15.10 to 16.04. The process was not completed apparently
due a problem with shim-signed. I now find the following message every
time I try to update the system:
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)
Furthermore, I have a dual boot system with Windows and Ubuntu but only
the latter works. Something seems to have gone south with UEFI. I attach
the efibootmgr output. My /etc/fstab looks as follows
# <file system> <mount point> <type> <options> <dump> <pass>
# / was on /dev/sda10 during installation
UUID=5cc07bc2-7247-40b6-8290-7edef8b4a39d / ext4
errors=remount-ro 0 1
# /boot was on /dev/sda9 during installation
#UUID=b22addc5-b969-47bf-a154-f91b6a137dd6 /boot ext4 defaults
0 2
# /home was on /dev/sda11 during installation
UUID=0aa517c8-aed2-446f-91c2-ecb573598a6d /home ext4 defaults
0 2
# swap was on /dev/sda8 during installation
#UUID=64342e46-54ea-46bf-826e-5667367e2301 none swap sw
0 0
/dev/mapper/cryptswap1 none swap sw 0 0
UUID=b22addc5-b969-47bf-a154-f91b6a137dd6 /boot ext4 defaults
0 2
#UUID=5251-F902 /boot/efi vfat defaults 0 1
#UUID=b032ab5d-1a06-4b52-afcb-14954b4b6ab8 /boot/efi /dev/sda1:
PARTLABEL= defaults 0 1
** Affects: shim-signed (Ubuntu)
Importance: Undecided
Status: New
** Attachment added: "efibootmgr output"
https://bugs.launchpad.net/bugs/1575813/+attachment/4649315/+files/efibootmgr.txt
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https://bugs.launchpad.net/bugs/1575813
Title:
Dual boot does not work after upgrade to 16.04
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