I still haven’t got a response from oscdump. my also runs but just sits there. I noticed during the trouble shoot you’ve linked I got some errors that stood out?

ftdi_sio ttyUSB0: usb_serial_generic_read_bulk_callback - rub stopped: -32

ftdi_sio ttyUSB0: error from flowcontrol urb

I don’t know what they mean but perhaps they have something to do with oscdump not running?