Ubuntu – Restore GTK integration after removing KDE


I was trying KDE (kubuntu-desktop) on top of an Ubuntu Unity install. Now I have uninstalled KDE. However, I see that any non-GTK based application still showing the KDE theme.

For example, below is a screenshot of the right-click menu of Nautilus:

nautilus menu

Below is a the right-click menu of the Chromium browser, which looks like it is still retaining the KDE theme:

chromium menu

How do I get rid of that KDE theme?

I have already removed the .kde folder, and .fonts.conf file and purged all KDE packages.

Procedure of Kubuntu removal

sudo apt-get remove --purge plasma? kubuntu?
sudo apt-get autoremove --purge

Best Answer

Hit Ctrl+Alt+T to open terminal and run:

sudo apt-get remove gtk2-engines-oxygen gtk3-engines-oxygen

Appearently kubuntu-desktop has installed a GTK theme so that GNOME/GTK apps look consistent with KDE/QT ones. I wonder why debfoster kubuntu-desktop- didn't remove it though :-)