So, I have not found anything useful using logs, so I just wrote a simple python script that turns on the "USEJOYSTICK" switch and put it into /etc/rc.local. Stupid workaround, but it works (with a slight delay after bootup).

I have tried testing my thumb joystick, fighting with its random deviations, which make everything more complicated. I am thinking of several methods how to control the speed without additional buttons. But for casual visual observations, it seems I would be happy enough just using the highest speed currently available. Higher speeds are not supported (and I do not dare to implement them now) and lower speeds do not currently seem to be necessary (the iExos-100 is not that much robust and stable for such delicate fine-tuning anyway, and for astrophotography a remote control by a computer seems more useful than manual joystick).

I was just a bit surprised yesterday: after slewing to some position in the sky using SkySafari, I started KStars at the Astroberry desktop and at that moment the mount driver got reset, thinking it is pointing to the NCP. Any idea why?

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