What is the problem?
I am unable to connect to my printer on /dev/ttyUSB0.
Connecting to: /dev/ttyUSB0
Changing monitoring state from "Offline" to "Error: Connection error, see Terminal tab"
Unexpected error while connecting to serial port: /dev/ttyUSB0 SerialException: '[Errno 13] could not open port /dev/ttyUSB0: [Errno 13] Permission denied: '/dev/ttyUSB0'' @ comm.py:_openSerial:2691 (hook default)
What did you already try to solve it?
Ensure ttyUSB0 is in dialout group. Rebooted. Tried AUTO for Serial Port. Ran dmesg to ensure printer is on ttyUSB0.
Additional information about your setup
New Kubuntu install on old Dell desktop. Worked a month ago when I had Ubuntu Mate installed... I needed to do a reinstall of Ubuntu so I went with Kubuntu.