package grub-efi-amd64 2.02~beta2-36ubuntu3 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1

[kelargo]

not sure if it is new or different.

ProblemType: Package
DistroRelease: Ubuntu 16.04
Package: grub-efi-amd64 2.02~beta2-36ubuntu3
ProcVersionSignature: Ubuntu 4.4.0-18.34-lowlatency 4.4.6
Uname: Linux 4.4.0-18-lowlatency x86_64
ApportVersion: 2.20.1-0ubuntu2
Architecture: amd64
Date: Sat Apr 16 03:36:02 2016
DuplicateSignature:
 Installing for x86_64-efi platform.
 Installation finished. No error reported.
 frontend: Fatal IO error 104 (Connection reset by peer) on X server :0.0.
 dpkg: error processing package grub-efi-amd64 (--configure):
  subprocess installed post-installation script returned error exit status 1
ErrorMessage: subprocess installed post-installation script returned error exit status 1
InstallationDate: Installed on 2015-11-24 (143 days ago)
InstallationMedia: Xubuntu 15.10 "Wily Werewolf" - Release amd64 (20151021)
ProcCmdLine: BOOT_IMAGE=/vmlinuz-4.4.0-18-lowlatency root=/dev/mapper/xubuntu--vg-root ro quiet splash vt.handoff=7
RelatedPackageVersions:
 dpkg 1.18.4ubuntu1
 apt 1.2.10ubuntu1
SourcePackage: grub2
Title: package grub-efi-amd64 2.02~beta2-36ubuntu3 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1
UpgradeStatus: Upgraded to xenial on 2016-04-15 (1 days ago)

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Phillip Susi (psusi)]

From the log:

frontend: Fatal IO error 104 (Connection reset by peer) on X server :0.0.

It appears that there was a prompt open and you xkilled it or logged out of Xwindows. Try running sudo apt-get install -f in a terminal to finish upgrading this package and answer any prompt it has for you.

[Launchpad Janitor (janitor)]

[Expired for grub2 (Ubuntu) because there has been no activity for 60 days.]