I post the solution step for not forget it:

After some talk with Jasem :
"I'm starting to suspect that something else is interfering with it. Maybe the GPS daemon? in dmesg it was shown pps0
Try to disable gpsd:
sudo systemctl stop gpsd gpsd.socket"

...
But the problem returned so the final solution:
Now totally disabled the gpsd deamon. Edited the /etc/default/gpsd script and made:

START_DEAMON="false"
USBAUTO="false"
and also put # in front of the rest...
And Now works perfectly.

For my hand is SOLVED!!!
Thanks to all,
Pep

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