very well. Do you have the /dev/gpspp0 link? Maybe the NMEA and PPS drivers are in conflict as they both try to use the same device. You could try removing the symlink or using only the NMEA driver, or using only the PPS driver and let it sync to one of the NTP server instead. You could also try to compensate the NMEA offset by setting time2 to 0.17 or -0.17. -- Miroslav Lichvar