Blank display on installing Kubuntu


I had a computer with Ubuntu 16.04 running the Unity desktop. I wanted to switch to Kubuntu, so I installed it using this command:

$ sudo apt install kubuntu-desktop

Everything installed fine, except this error at the end:

kde-telepathy-minimal : Depends: kde-config-telepathy-accounts (>= 0.9.0) but it is not installed

After this, there is an error about kaccounts-provider whenever I login into Unity. If I try to login into the KDE desktop, I get a blank display!


This error seems to be hitting lots of people as seen here. This seems to be caused by a conflict between packages required by Unity and KDE. Apparently, Unity (Ubuntu) and KDE (Kubuntu) cannot be installed on the same computer!

Following some clues given by other users, I forcefully removed Telepathy since I did not need it anyway:

$ sudo dpkg --remove kde-telepathy
$ sudo apt update
$ sudo apt dist-upgrade

After this the Unity error on login and the black display in KDE went away. I was able to switch to using KDE as my primary desktop.

So, if you intend to use Kubuntu, you are better off installing a Kubuntu ISO directly instead of installing it from inside Ubuntu.


Single click to open not working in Dolphin


I recently upgraded a Kubuntu 15.10 operating system to Kubuntu 16.04. I used to use single-click to open files and directories in the Dolphin file manager. This stopped working after the upgrade. Only double-click would open files and directories.


  • The option to choose between single-click or double-click can be set in System Settings → Input Devices → Mouse. However, this had no effect in Dolphin. I even checked that it was set:
$ cat ~/.config/kdeglobals | grep SingleClick
  • Further investigation showed that this was a known bug. It is fixed, but I guess it will be a while before that flows downstream to Kubuntu.

  • The only solution that worked for me was to install the older Dolphin from KDE 4 and running it instead of the default Dolphin from KDE 5:

$ sudo apt install dolphin4
$ dolphin4

Kubuntu install stuck with unmet dependencies


I tried to install Kubuntu on an existing Ubuntu system using this command:

$ sudo apt install kubuntu-desktop

And I got this package dependency error:

You might want to run 'apt-get -f install' to correct these:
The following packages have unmet dependencies:
 kde-telepathy-minimal : Depends: kde-config-telepathy-accounts (>= 15.04.0) but it is not going to be installed
 unity-scope-gdrive : Depends: account-plugin-google but it is not going to be installed
E: Unmet dependencies. Try 'apt-get -f install' with no packages (or specify a solution).

However, running sudo apt-get -f install would stop with the same dependency problem.


The key here is to realize that apt itself cannot resolve this cyclic dependency. So, to fix it we need to use a lower-level tool to explicitly take out the offending package. We can do that by using dpkg:

$ sudo dpkg --purge unity-scope-gdrive
$ sudo dpkg --purge account-plugin-google
$ sudo apt-get -f install

Tried with: Ubuntu 15.10