dan@dan:~$ sudo do-release-upgrade
Checking for a new Ubuntu release
Get:1 Upgrade tool signature [819 B]
Get:2 Upgrade tool [1,257 kB]
Fetched 1,258 kB in 0s (0 B/s)
authenticate 'zesty.tar.gz' against 'zesty.tar.gz.gpg'
extracting 'zesty.tar.gz'
Reading cache
Checking package manager
Reading package lists... Done
Building dependency tree
Reading state information... Done
Hit http://us.archive.ubuntu.com/ubuntu xenial InRelease
Hit http://archive.canonical.com/ubuntu xenial InRelease
Get:1 http://us.archive.ubuntu.com/ubuntu xenial-updates InRelease [102 kB]
Get:2 http://security.ubuntu.com/ubuntu xenial-security InRelease [102 kB]
Fetched 204 kB in 0s (0 B/s)
Reading package lists... Done
Building dependency tree
Reading state information... Done
Updating repository information
Get:1 http://us.archive.ubuntu.com/ubuntu zesty InRelease [243 kB]
Get:2 http://security.ubuntu.com/ubuntu zesty-security InRelease [89.2 kB]
Get:3 http://archive.canonical.com/ubuntu zesty InRelease [10.2 kB]
Get:4 http://archive.canonical.com/ubuntu zesty/partner Sources [1,416 B]
Get:5 http://us.archive.ubuntu.com/ubuntu zesty-updates InRelease [89.2 kB]
Get:6 http://us.archive.ubuntu.com/ubuntu zesty/multiverse Sources [184 kB]
Get:7 http://archive.canonical.com/ubuntu zesty/partner amd64 Packages [1,620 B]
Get:8 http://archive.canonical.com/ubuntu zesty/partner i386 Packages [1,616 B]
Get:9 http://archive.canonical.com/ubuntu zesty/partner Translation-en [708 B]
Get:10 http://us.archive.ubuntu.com/ubuntu zesty/restricted Sources [5,064 B]
Get:11 http://us.archive.ubuntu.com/ubuntu zesty/main Sources [912 kB]
Get:12 http://security.ubuntu.com/ubuntu zesty-security/multiverse Sources [1,352 B]
Get:13 http://us.archive.ubuntu.com/ubuntu zesty/universe Sources [8,459 kB]
Get:14 http://security.ubuntu.com/ubuntu zesty-security/restricted Sources [964 B]
Get:15 http://security.ubuntu.com/ubuntu zesty-security/main Sources [63.3 kB]
Get:16 http://security.ubuntu.com/ubuntu zesty-security/universe Sources [31.3 kB]
Get:17 http://security.ubuntu.com/ubuntu zesty-security/main amd64 Packages [174 kB]
Get:18 http://security.ubuntu.com/ubuntu zesty-security/main i386 Packages [170 kB]
Get:19 http://security.ubuntu.com/ubuntu zesty-security/main Translation-en [79.6 kB]
Get:20 http://security.ubuntu.com/ubuntu zesty-security/main amd64 DEP-11 Metadata [15.1 kB]
Get:21 http://security.ubuntu.com/ubuntu zesty-security/main DEP-11 64x64 Icons [17.6 kB]
Get:22 http://security.ubuntu.com/ubuntu zesty-security/restricted amd64 Packages [2,436 B]
Get:23 http://security.ubuntu.com/ubuntu zesty-security/restricted i386 Packages [2,428 B]
Get:24 http://security.ubuntu.com/ubuntu zesty-security/restricted Translation-en [1,352 B]
Get:25 http://security.ubuntu.com/ubuntu zesty-security/restricted amd64 DEP-11 Metadata [192 B]
Get:26 http://security.ubuntu.com/ubuntu zesty-security/universe amd64 Packages [90.4 kB]
Get:27 http://security.ubuntu.com/ubuntu zesty-security/universe i386 Packages [90.6 kB]
Get:28 http://security.ubuntu.com/ubuntu zesty-security/universe Translation-en [59.0 kB]
Get:29 http://security.ubuntu.com/ubuntu zesty-security/universe amd64 DEP-11 Metadata [27.4 kB]
Get:30 http://us.archive.ubuntu.com/ubuntu zesty/main amd64 Packages [1,207 kB]
Get:31 http://security.ubuntu.com/ubuntu zesty-security/universe DEP-11 64x64 Icons [52.1 kB]
Get:32 http://security.ubuntu.com/ubuntu zesty-security/multiverse amd64 Packages [2,964 B]
Get:33 http://security.ubuntu.com/ubuntu zesty-security/multiverse i386 Packages [3,128 B]
Get:34 http://security.ubuntu.com/ubuntu zesty-security/multiverse Translation-en [1,744 B]
Get:35 http://security.ubuntu.com/ubuntu zesty-security/multiverse amd64 DEP-11 Metadata [208 B]
Get:36 http://security.ubuntu.com/ubuntu zesty-security/multiverse DEP-11 64x64 Icons [29 B]
Get:37 http://us.archive.ubuntu.com/ubuntu zesty/main i386 Packages [1,204 kB]
Get:38 http://us.archive.ubuntu.com/ubuntu zesty/main Translation-en [577 kB]
Get:39 http://us.archive.ubuntu.com/ubuntu zesty/main amd64 DEP-11 Metadata [536 kB]
Get:40 http://us.archive.ubuntu.com/ubuntu zesty/main DEP-11 64x64 Icons [373 kB]
Get:41 http://us.archive.ubuntu.com/ubuntu zesty/restricted amd64 Packages [8,672 B]
Get:42 http://us.archive.ubuntu.com/ubuntu zesty/restricted i386 Packages [8,648 B]
Get:43 http://us.archive.ubuntu.com/ubuntu zesty/restricted Translation-en [2,724 B]
Get:44 http://us.archive.ubuntu.com/ubuntu zesty/restricted amd64 DEP-11 Metadata [185 B]
Get:45 http://us.archive.ubuntu.com/ubuntu zesty/universe amd64 Packages [8,068 kB]
Get:46 http://us.archive.ubuntu.com/ubuntu zesty/universe i386 Packages [8,037 kB]
Get:47 http://us.archive.ubuntu.com/ubuntu zesty/universe Translation-en [4,671 kB]
Get:48 http://us.archive.ubuntu.com/ubuntu zesty/universe amd64 DEP-11 Metadata [2,713 kB]
Get:49 http://us.archive.ubuntu.com/ubuntu zesty/universe DEP-11 64x64 Icons [7,842 kB]
Get:50 http://us.archive.ubuntu.com/ubuntu zesty/multiverse amd64 Packages [154 kB]
Get:51 http://us.archive.ubuntu.com/ubuntu zesty/multiverse i386 Packages [147 kB]
Get:52 http://us.archive.ubuntu.com/ubuntu zesty/multiverse Translation-en [109 kB]
Get:53 http://us.archive.ubuntu.com/ubuntu zesty/multiverse amd64 DEP-11 Metadata [43.3 kB]
Get:54 http://us.archive.ubuntu.com/ubuntu zesty/multiverse DEP-11 64x64 Icons [207 kB]
Get:55 http://us.archive.ubuntu.com/ubuntu zesty-updates/multiverse Sources [4,696 B]
Get:56 http://us.archive.ubuntu.com/ubuntu zesty-updates/restricted Sources [1,436 B]
Get:57 http://us.archive.ubuntu.com/ubuntu zesty-updates/main Sources [105 kB]
Get:58 http://us.archive.ubuntu.com/ubuntu zesty-updates/universe Sources [71.6 kB]
Get:59 http://us.archive.ubuntu.com/ubuntu zesty-updates/main amd64 Packages [250 kB]
Get:60 http://us.archive.ubuntu.com/ubuntu zesty-updates/main i386 Packages [246 kB]
Get:61 http://us.archive.ubuntu.com/ubuntu zesty-updates/main Translation-en [114 kB]
Get:62 http://us.archive.ubuntu.com/ubuntu zesty-updates/main amd64 DEP-11 Metadata [55.1 kB]
Get:63 http://us.archive.ubuntu.com/ubuntu zesty-updates/main DEP-11 64x64 Icons [32.3 kB]
Get:64 http://us.archive.ubuntu.com/ubuntu zesty-updates/restricted amd64 Packages [2,772 B]
Get:65 http://us.archive.ubuntu.com/ubuntu zesty-updates/restricted i386 Packages [2,756 B]
Get:66 http://us.archive.ubuntu.com/ubuntu zesty-updates/restricted Translation-en [1,516 B]
Get:67 http://us.archive.ubuntu.com/ubuntu zesty-updates/restricted amd64 DEP-11 Metadata [193 B]
Get:68 http://us.archive.ubuntu.com/ubuntu zesty-updates/universe amd64 Packages [168 kB]
Get:69 http://us.archive.ubuntu.com/ubuntu zesty-updates/universe i386 Packages [168 kB]
Get:70 http://us.archive.ubuntu.com/ubuntu zesty-updates/universe Translation-en [94.9 kB]
Get:71 http://us.archive.ubuntu.com/ubuntu zesty-updates/universe amd64 DEP-11 Metadata [203 kB]
Get:72 http://us.archive.ubuntu.com/ubuntu zesty-updates/universe DEP-11 64x64 Icons [276 kB]
Get:73 http://us.archive.ubuntu.com/ubuntu zesty-updates/multiverse amd64 Packages [11.8 kB]
Get:74 http://us.archive.ubuntu.com/ubuntu zesty-updates/multiverse i386 Packages [12.0 kB]
Get:75 http://us.archive.ubuntu.com/ubuntu zesty-updates/multiverse Translation-en [6,280 B]
Get:76 http://us.archive.ubuntu.com/ubuntu zesty-updates/multiverse amd64 DEP-11 Metadata [5,840 B]
Get:77 http://us.archive.ubuntu.com/ubuntu zesty-updates/multiverse DEP-11 64x64 Icons [9,203 B]
Fetched 48.6 MB in 6s (7,855 kB/s)
(appstreamcli:27284): GLib-CRITICAL **: g_strchug: assertion 'string != NULL' failed
(appstreamcli:27284): GLib-CRITICAL **: g_strchomp: assertion 'string != NULL' failed
(appstreamcli:27284): GLib-CRITICAL **: g_strchug: assertion 'string != NULL' failed
(appstreamcli:27284): GLib-CRITICAL **: g_strchomp: assertion 'string != NULL' failed
Checking package manager
Reading package lists... Done
Building dependency tree
Reading state information... Done
Calculating the changes
Calculating the changes
Could not calculate the upgrade
An unresolvable problem occurred while calculating the upgrade.
This can be caused by:
* Upgrading to a pre-release version of Ubuntu
* Running the current pre-release version of Ubuntu
* Unofficial software packages not provided by Ubuntu
If none of this applies, then please report this bug using the
command 'ubuntu-bug ubuntu-release-upgrader-core' in a terminal.
Restoring original system state
Aborting
Reading package lists... Done
Building dependency tree
Reading state information... Done
dan@dan:~$ lsb_release -rd
Description: Ubuntu 16.04.3 LTS
Release: 16.04
ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: ubuntu-release-upgrader-core 1:16.04.23
ProcVersionSignature: Ubuntu 4.10.0-42.46~16.04.1-generic 4.10.17
Uname: Linux 4.10.0-42-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.14
Architecture: amd64
CrashDB: ubuntu
CurrentDesktop: Unity
Date: Sun Dec 17 18:21:42 2017
InstallationDate: Installed on 2017-09-13 (95 days ago)
InstallationMedia: Ubuntu 16.04.2 LTS "Xenial Xerus" - Release amd64 (20170215.2)
PackageArchitecture: all
SourcePackage: ubuntu-release-upgrader
UpgradeStatus: Upgraded to xenial on 2017-12-18 (0 days ago)
mtime.conffile..etc.update-manager.release-upgrades: 2017-10-24T21:04:03.997500
