Upgrade to 14.10 from 14.04 fails for Lubuntu

[mkoniecz]

https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/1354489 and https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/1365030 are similar but closed as invalid

ubuntu-release-upgrader told me to report this bug

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: ubuntu-release-upgrader-core 1:0.220.7
ProcVersionSignature: Ubuntu 3.13.0-46.76-generic 3.13.11-ckt15
Uname: Linux 3.13.0-46-generic i686
ApportVersion: 2.14.1-0ubuntu3.7
Architecture: i386
CrashDB: ubuntu
CurrentDesktop: LXDE
Date: Sat Feb 28 12:49:15 2015
InstallationDate: Installed on 2015-02-12 (15 days ago)
InstallationMedia: Lubuntu 14.04.1 LTS "Trusty Tahr" - Release i386 (20140722.2)
PackageArchitecture: all
SourcePackage: ubuntu-release-upgrader
UpgradeStatus: Upgraded to trusty on 2015-02-28 (0 days ago)
VarLogDistupgradeTermlog:

mtime.conffile..etc.update.manager.release.upgrades: 2015-02-28T12:08:14.770315