Hello All,
I have now created a VM based upon KUbuntu 18.04 LTS.
I installed the full INDI package including KStars/Ekos and all 3rd party drivers (GSC) with no problem
and the VM works flawlessly. So the problem ist really related to KUbuntu 19.10.

Thanks to all for your suggestions!

Clear Skies
Helmut Zimmermann
Cologne/Germany

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