Freeze on cold start

[PaddyB]

Sailoog,
It was not possible to paste anything copied from the NMEA debug window  (got message : empty clipboard)
The GPS  Status seems OK, 4 satellites used, 10 in view. The Fix indicator shows steadily 3 bars.For me it doesn't looks like a loss problem.
I have had my GPS in the same place for 2 years now  - a few mm below the glass of the roof window - and never experienced a loss of signal after getting a fix.
More investigation to come ...

EDIT : a signal weakening problem would also affect OpenCPN when using a TCP Connection, wouldn't it ?

Do you have influxdb running? It's really useful to see what's been going on, this is satellites in view >