Hello, we are trying to reuse the trimble GPS from our old TTM server in a Linux NTP machine, and it is not working. We can read some trash with a "cat /dev/ttyS0" (what means that the GPS is sending information), and we can use PPS driver (127.127.22.0) to read correctly the PPS signal. But the driver from RIPE (127.127.43.0) doesn't work. We compiled the ntpd (version 4.2.6p5) with the following options: ./configure --with-openssl-libdir=/usr/lib/x86_64-linux-gnu --with-openssl-incdir=/usr/include --enable-RIPENCC Our Linux is: # uname -a Linux monitor 3.11.0-20-generic #35~precise1-Ubuntu SMP Fri May 2 21:32:55 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux # lsb_release -a No LSB modules are available. Distributor ID: Ubuntu Description: Ubuntu 12.04.4 LTS Release: 12.04 Codename: precise Only after follow the recommendations at http://linuxpps.org/wiki/index.php/LinuxPPS_NTPD_support, the driver 127.127.43.0 is loaded by NTP, and appears in the list of peers, but no sync, just zeros. Does anyone in this list have any tips? Regards, Moreiras.