Single click to open not working in Dolphin

Problem

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.

Solution

  • 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
SingleClick=true
  • 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

Problem

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.

Solution

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