>
>
> 1. Unfortunately in most of the tries, I cannot add any displays (e.g Point
> clouds) via the user interface, the selection box for selecting the display
> type is simply empty. I could not yet figure out when and why the box will
> be empty or not.
>

What happens if you go to the Plugins menu, and load the builtin plugin?


>
> 2. after quitting rviz via the menu or ctrl-C it will crash on the next
> start until I delete the ~/.rviz AND */.ros directories.
>

Can you get a stack trace?

Josh