default umbrello package on ubuntu 16.04 LTS (Frameworks 5.18, Qt 5.5.1) does not show any icons in the toolbar How to reproduce: 1. install umbrello with 'apt-get install umbrello' 2. start umbrello What happens ? There are no icons displayed in the toolbar although toolbar "text position" setting is set to "text beside symbols" What is expected ? The toolbar should show the related icons
You need a Qt platform plugin, either provided by Plasma (if you are running the Plasma workspace), or using qt5ct. See https://wiki.archlinux.org/index.php/qt#Configuration_of_Qt5_apps_under_environments_other_than_KDE_Plasma