Created attachment 92483 [details] screenshot After pressing F4 panel is shown with nothing inside. Kubuntu 15.04 Dolphin version: 15.04.0
Thanks for the bug report, but I cannot reproduce the problem. This might be due to a missing package (do you have the KF5-based version of Konsole installed) or a packaging issue of your distribution.
It says it uses KDE Frameworks 5.9.0 in the About dialog. Installed package version is 15.04.0-0ubuntu1~ubuntu15.04~ppa1 for both konsole and konsole-kpart.
Thanks for the quick reply. Unfortunately, I don't see what could be the cause of the problem then, but I'm 99% sure that the problem is on the Kubuntu side (or specific to your system due to some messed-up configurations) and nothing that KDE could do anything about. You might want to ask in a Kubuntu forum if other users experience the same problems (and how they fixed them) or report the issue tu the Kubuntu bug tracker.
https://bugs.launchpad.net/kubuntu-ppa/+bug/1452920
Thanks! If it turns out that anything can be done on the KDE side to improve the situation, please let us know.