encountered a few errors while upgrading from 15.10 to 16.04. Then there was a message that there were too many errors and the upgrade process will be aborted but then nothing happened and after I restarted my laptop was running ubuntu 16.04. After logging in though numerous errors popped up on of which was the above.
ProblemType: Package
DistroRelease: Ubuntu 16.04
Package: systemd-sysv 229-4ubuntu4
ProcVersionSignature: Ubuntu 4.4.0-21.37-generic 4.4.6
Uname: Linux 4.4.0-21-generic x86_64
ApportVersion: 2.20.1-0ubuntu2
Architecture: amd64
Date: Fri Apr 22 17:00:03 2016
ErrorMessage: pre-dependency problem - not installing systemd-sysv
InstallationDate: Installed on 2016-04-12 (9 days ago)
InstallationMedia: Ubuntu 15.10 "Wily Werewolf" - Release amd64 (20151021)
RelatedPackageVersions:
dpkg 1.18.4ubuntu1
apt 1.2.10ubuntu1
SourcePackage: systemd
Title: package systemd-sysv 229-4ubuntu4 failed to install/upgrade: pre-dependency problem - not installing systemd-sysv
UpgradeStatus: Upgraded to xenial on 2016-04-22 (0 days ago)
Thanks for taking the time to report this bug and helping to make Ubuntu better. We appreciate the difficulties you are facing, but this appears to be a "regular" (non-security) bug. I have unmarked it as a security issue since this bug does not show evidence of allowing attackers to cross privilege boundaries nor directly cause loss of data/privacy. Please feel free to report any other bugs you may find.