Failed to upgrade from Trusty to Xenial when using "sudo update-manager -d"

[Alexis Bruemmer]

from terminal:

sudo update-manager -d

software updater runs and gives the option to upgrade, when I hit the upgrade button it exits and this is the only thing that is on terminal:

alexisb@alexisb-ThinkPad-X1-Carbon-2nd:~$ sudo update-manager -d
[sudo] password for alexisb:
Hangup
alexisb@alexisb-ThinkPad-X1-Carbon-2nd:~$

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: ubuntu-release-upgrader-core 1:0.220.8
ProcVersionSignature: Ubuntu 3.13.0-85.129-generic 3.13.11-ckt36
Uname: Linux 3.13.0-85-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.19
Architecture: amd64
CrashDB: ubuntu
CurrentDesktop: Unity
Date: Tue May 3 13:32:28 2016
InstallationDate: Installed on 2014-06-20 (682 days ago)
InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
PackageArchitecture: all
SourcePackage: ubuntu-release-upgrader
Symptom: ubuntu-release-upgrader
UpgradeStatus: Upgraded to trusty on 2016-05-03 (0 days ago)
VarLogDistupgradeAptlog:
 Log time: 2016-05-03 12:30:23.112657
 Log time: 2016-05-03 12:30:39.457615

[Brian Murray (brian-murray)]

You shouldn't need to run update-manager with sudo, it will elevate privileges later on during the process. Additionally, it looks like it was attempting to upgrade to 15.10 (wily). Is that the release you want to upgrade to? If not then edit /etc/update-manager/release-upgrades and change Prompt to lts instead of normal.

[Launchpad Janitor (janitor)]

[Expired for ubuntu-release-upgrader (Ubuntu) because there has been no activity for 60 days.]