Public bug reported:
The installer crashed after complaining that grub could not be
On the system I was trying to upgrade, a user had abused their "sudo for
apt-get only" privileges to run sudo apt-get purge upstart, so the
computer had no /sbin/init, and would kernel panic on boot.
Since this was a 14.04 machine, I decided to use this as an opportunity
to upgrade to 16.04. I tried to use the "upgrade from 14.04 to 16.04"
button in the installer, and got this error.
Normally, I wouldn't expect the installer to work in such exceptional
circumstances anyways, but after trying to rerun the installer to
perform a clean install, it reached the same step and failed again.
The exact message is:
The 'grub-efi-amd64-signed' package failed to install into /target/.
Without the GRUB boot loader, the installed system will not boot.
In the terminal log attached to the installer window, a message
something like "INFO: apt-get install grub-[something] failed" is
After clicking OK in the error window, the installer freezes up, then
presents me a window with title "Installer crashed" and the message:
We're sorry; the installer crashed. After you close this window, we'll
allow you to file a bug report using the integrated bug reporting tool.
This will gather information about your system and your installation
process. The details will be sent to our bug tracker and a developer
will attend to the problem as soon as possible.
I'll be rebooting now to see if the installer magically works after a
reboot and to verify the integrity of my installation media.
DistroRelease: Ubuntu 16.04
Package: ubiquity 126.96.36.199 [modified:
ProcVersionSignature: Ubuntu 4.4.0-31.50-generic 4.4.13
Uname: Linux 4.4.0-31-generic x86_64
Date: Thu Dec 1 10:34:32 2016
InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz.efi file=/cdrom/preseed/ubuntu.seed
boot=casper quiet splash ---
LiveMediaBuild: Ubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719)
PATH=(custom, no user)
UpgradeStatus: No upgrade log present (probably fresh install)
** Affects: grub-installer (Ubuntu)
** Tags: amd64 apport-bug ubiquity-188.8.131.52 ubuntu xenial
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Upgrading from 14.04 to 16.04 fails when recovering from `apt-get
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