Upgrading "linux-image-generic" forces removal of "grub-efi-amd64" in Ubuntu 14.10 Utopic Unicorn. However, replacement of "grub-efi-amd64" with "grub-pc" would render the system unbootable, because UEFI boot process requires "grub-efi".
Similar bug has apparently existed in earlier Ubuntu versions (e.g. https://bugs.launchpad.net/ubuntu/+source/linux/+bug/532903 and https://bugs.launchpad.net/ubuntu/+source/apt/+bug/800910 ), but it seems to have resurfaced. Some more information can be found at http://askubuntu.com/questions/576994/dist-upgrade-in-ubuntu-14-10-tries-to-remove-grub-efi-amd64
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ApportVersion: 2.14.7-0ubuntu8.1
Architecture: i386
DistroRelease: Ubuntu 14.10
EcryptfsInUse: Yes
InstallationDate: Installed on 2009-11-08 (1919 days ago)
InstallationMedia: Kubuntu 9.10 "Karmic Koala" - Release i386 (20091028.5)
Package: linux
PackageArchitecture: i386
ProcEnviron:
TERM=screen
PATH=(custom, no user)
XDG_RUNTIME_DIR=<set>
LANG=en_US.UTF-8
SHELL=/bin/bash
ProcVersionSignature: Ubuntu 3.16.0-28.38-generic 3.16.7-ckt1
Tags: utopic
Uname: Linux 3.16.0-28-generic i686
UpgradeStatus: Upgraded to utopic on 2014-10-31 (101 days ago)
UserGroups: adm admin cdrom dialout lpadmin mythtv plugdev sambashare
_MarkForUpload: True
This bug is missing log files that will aid in diagnosing the problem. From a terminal window please run:
apport-collect 1419900
and then change the status of the bug to 'Confirmed'.
If, due to the nature of the issue you have encountered, you are unable to run this command, please add a comment stating that fact and change the bug status to 'Confirmed'.
This change has been made by an automated script, maintained by the Ubuntu Kernel Team.