dmesg is a command you enter in a terminal. It’s mainly for tailing the kernels message output. If you run this and then plug in the focuser usb cable it will hopefully show the messages as the kernel loads up the driver.

Otherwise you can look at the various log files which live in /var/log. You will need to open a terminal cd to /var/log type ls -lrt to list the files in last modified time order and look for ones called something like boot.log or kern.log (there are various log files and I’m not entirely sure of the differences so you might have to look at a couple). Use something like vi (or editor of choice) and search for Celestron which should take you to the correct messages. I can’t confirm 100% as my setup is currently in pieces but it should be fairly obvious from what I remember. These lines should show which usb port is assigned. If it’s the one the indi driver is trying to use then keep looking through your log file to see if something else takes over that port as happened to me.


Another alternative is to use lsusb to list what ports are assigned to what, however you will most likely need to install the package usbutils. See www.thegeekdiary.com/lsusb-command-not-found/ for some details about this.

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