у меня
gpsd[1246]: gpsd:ERROR: SER: device open of /dev/ttyACM0 failed: Device or resource busy - retrying read-only
gpsd[1246]: gpsd:ERROR: SER: read-only device open of /dev/ttyACM0 failed: Device or resource busy
gpsd[1246]: gpsd:ERROR: /dev/ttyACM0: device activation failed.
gpsd[1246]: gpsd:ERROR: /dev/ttyACM0: activation failed, freeing device