hi!
i checked the doc - USB 1.1 seems to be the response from this converter, which is apparently an older model.
as far as i can tell, all is fine with your converter. so it is either a hardware failure (scarce) or a software problem ...

i am running out of suggestions, maybe someone with a better understanding of udev rules might be able to help.
... i still see the focuser as a separate device here - which is suspicious.

one idea:
- move the udev rules file to a different location so that they are not executed at startup
- reboot
- now, you cannot access /dev/ttyUSB0 UNLESS you are root OR - i hope that works - you give everyone else access to the device by typing

sudo chmod a+rw /dev/ttyUSB0

in the terminal. start kstars in the same terminal. if this works (unless i typed some BS, which is always possible), then the udev rules are the problem. this is not a remedy, by the way. next time you reboot, access is gone again ...

yours wolfi

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