Bonjour
Il ne manque rien
Tu peux voir sur le site opencpn ou tout est dit :
http://opencpn.org/ocpn/setting_up_gps
J ai effectué la manoevre suivante pour résoudre un probleme similaire au tien :
Make sure that gpsd isn't running then connect your gps and start OpenCPN. On Ubuntu 12.04 the easiest way to achive this is to unistall gpsd.
In the Toolbox-->GPS --> "NMEA Data Source" the port where you plugged in your gps will come up. If you plugged in BU 353 this will probably be /dev/ttyUSB0.
Choose 4800 baud, unless you know that the gps is set to something else.
The gps should now work....if not, check the NMEA data stream window. If only binary garbage is visible, the gps has to be reset to NMEA mode, see more about this above in windows section.
To do this in Linux for BU 353 as well as many other gps:es, make sure that gpsd is running and that the package "gpsd-clients" is installed. On Ubuntu 12.04 gpsd needs to be temporarily installed. Make sure to kill any instances of gpsd with the command "sudo killall gpsd"
The command $gpsctl -n will put the GPS into NMEA mode.
If that doesn't work, try $ gpsctl -f -n /dev/ttyUSB0 .This will force a low-level access, bypassing gpsd. For more information: $man gpsctl
