Ran into the same issue, and was stuck with apt not being able to get to a working, clean state, see below.
I had to use aptitude (instead of apt), which gave a proper solution and managed to deinstall, finally my solution was: aptitude remove kde-telepathy-minimal apt remove 'unity-*' apt autoremove apt remove kubuntu-desktop apt install --reinstall kubuntu-desktop # apt remove unity Reading package lists... Building dependency tree... Reading state information... Correcting dependencies... Done The following additional packages will be installed: kde-config-telepathy-accounts The following NEW packages will be installed: kde-config-telepathy-accounts 0 upgraded, 1 newly installed, 0 to remove and 0 not upgraded. 385 not fully installed or removed. Need to get 0 B/137 kB of archives. After this operation, 825 kB of additional disk space will be used. (Reading database ... 55%[Y/n] (Reading database ... (Reading database ... 759436 files and directories currently installed.) Preparing to unpack .../kde-config-telepathy-accounts_4%3a15.12.3-0ubuntu1_amd64.deb .. . Unpacking kde-config-telepathy-accounts (4:15.12.3-0ubuntu1) ... dpkg: error processing archive /var/cache/apt/archives/kde-config-telepathy-accounts_4% 3a15.12.3-0ubuntu1_amd64.deb (--unpack): trying to overwrite '/usr/share/accounts/services/google-im.service', which is also in package account-plugin-google 0.12+16.04.20160126-0ubuntu1 Processing triggers for libc-bin (2.23-0ubuntu7) ... Errors were encountered while processing: /var/cache/apt/archives/kde-config-telepathy-accounts_4%3a15.12.3-0ubuntu1_amd64.deb E: Sub-process /usr/bin/dpkg returned an error code (1) # aptitude why account-plugin-google i unity Empfiehlt unity-scope-gdrive i A unity-scope-gdrive Hängt ab von account-plugin-google -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to account-plugins in Ubuntu. https://bugs.launchpad.net/bugs/1622206 Title: package account-plugin-google not installed failed to install/upgrade: trying to overwrite /usr/share/accounts/services /google-im.service , which is also in package kde-config-telepathy- accounts 4:15.12.3-0ubuntu1! Status in account-plugins package in Ubuntu: Confirmed Bug description: I don't know ProblemType: Package DistroRelease: Ubuntu 16.04 Package: account-plugin-google (not installed) ProcVersionSignature: Ubuntu 4.4.0-36.55-generic 4.4.16 Uname: Linux 4.4.0-36-generic x86_64 NonfreeKernelModules: wl ApportVersion: 2.20.1-0ubuntu2.1 Architecture: amd64 Date: Sat Sep 10 00:41:19 2016 DuplicateSignature: package:account-plugin-google:(not installed) Unpacking account-plugin-google (0.12+16.04.20160126-0ubuntu1) ... dpkg: error processing archive /var/cache/apt/archives/account-plugin-google_0.12+16.04.20160126-0ubuntu1_all.deb (--unpack): trying to overwrite '/usr/share/accounts/services/google-im.service', which is also in package kde-config-telepathy-accounts 4:15.12.3-0ubuntu1 ErrorMessage: trying to overwrite '/usr/share/accounts/services/google-im.service', which is also in package kde-config-telepathy-accounts 4:15.12.3-0ubuntu1 InstallationDate: Installed on 2016-09-10 (0 days ago) InstallationMedia: Ubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719) RelatedPackageVersions: dpkg 1.18.4ubuntu1.1 apt 1.2.12~ubuntu16.04.1 SourcePackage: account-plugins Title: package account-plugin-google (not installed) failed to install/upgrade: trying to overwrite '/usr/share/accounts/services/google-im.service', which is also in package kde-config-telepathy-accounts 4:15.12.3-0ubuntu1 UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/account-plugins/+bug/1622206/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp