Thank you for your response.

I am using KStars build 2018-08-18T08:13:48Z Version 2.9.8
KDE Frameworks 5.18.0
Qt 5.5.1
Ubuntu 16.04 LTS
2.0 GB RAM
Intel CPU T2400 @ 1.86 GHzx2
Graphics Intel 945GM x86/MMX/SSE2

The camera is connected by USB 2.0 (using the USB 3.0 cable that came with the camera)

I installed ASICAP for Linux and I am observing the same problem (see attachment).

Any suggestions what to do next?

Thanks again for your help!