In the Connections window the pretty names are displayed fine.
To be displayed in the Graph window I have to disable and enable "Enable client/port aliases". But then QjackCtl wants to save them when I stop it which shouldn't happen because nothing changed.
EDIT:
When I start another jack client while QjackCtl is running then the Graph window is updated to show the pretty names.
In the Connections window the pretty names are displayed fine.
To be displayed in the Graph window I have to disable and enable "Enable client/port aliases". But then QjackCtl wants to save them when I stop it which shouldn't happen because nothing changed.
EDIT:
When I start another jack client while QjackCtl is running then the Graph window is updated to show the pretty names.