[LinuxPPS] PPS/ntpd fails on fresh startup

[Cirilo Bernardo]

On Wed, Oct 15, 2008 at 10:15 PM, Udo van den Heuvel <udovdh at xs4all.nl> wrote:
> Luca Bertagnolio wrote:
>> On Wed, Oct 15, 2008 at 12:27 PM, Rodolfo Giometti
>> <giometti at enneenne.com> wrote:
>>> LinuxPPS is 18.
>>
>> hmmm... can you give me any hint as to I can "verify the current LDISC" on my
>> system, Rodolfo?
>>
>>> If so I suppose this code may help us in solving our LDISC problem. We
>>> only have to find a suitable mode to tell NTPD to set N_PPS ldisc
>>> instead of the wrong one...
>>
>> Good to know that we're starting to see light at the end of the
>> tunnel.  Still, I
>> dont' quite understand why running ntpd the first time doesn't work, and the
>> second one does...
>
> In reflock_nmea I see in nmea_start as one of the first things:
>
>        fd = refclock_open(device, SPEED232, LDISC_CLK);
>
> So if this is a problem, why does the clock work?
>

Perhaps it is a race condition?

- Cirilo