Rviz fixed-frame selections

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I too noticed that rviz sometimes has problems restoring settings and filling the Fixed Frame dropdown properly.

You could try the following steps:

• While RVIZ is running configure it the way it sould be, if the dropdown is empty just type the name of a valid frame
• Manually save the rviz config to a vcg file
• When you start rviz specify the parameter -d and give it the path to your vcg file

In a launch file it could look like this:

<node pkg="rviz" type="rviz" name="rviz" required="true" args="-d $(find your_stack)/test.vcg"/>

I had to repeat this twice, but after that I allways get the correct frame selected on startup

Another option could be using the visualization_experimental stack. This includes a new version of rviz that uses qt. But I have not yet tried this, so I can't tell if rviz_qt handles configurations better.