GPS Lock problem

forums.garmin.com/.../gps-2-90-is-now-live

Your firmware and GPS are very, very old.  My wife and I both have a 945, and the current watch firmware and GPS firmware are on point.  Sat acquisition is fast, the GPS tracks are good. Out of curiosity, why don't you want to update?

Old, but it was working Ok until the last week.
Why I don't want to update? because of the issues (battery drain for example) that the new versions have. I am waiting for a version that will be stable (now I am following the bug report of the new 4.20)

Coincidentally the problem started after the release of the new version... conspiracy theory?

Battery drain issue was fixed as of 4.1/4.2.   I'm only talking about two watches, but it fixed it for both of us.  

Good to know, thanks

First of all I would suggest you to update your software version, especially the GPS one, because the recent GPS software update intend to fix the GPS lock time.

I agree that the older hardware e.g. FR920, FR735 has a much faster GPS lock time, my older FR735 can always lock the GPS in 10 seconds, while my FR945 takes around one minute. I believe it is because the older generation FR use Mediatek GPS chips, while the newer generation FR use the Sony GPS chips, which consume less power, however worse GPS lock time and also less accurate.

Yes, that's right, I said the same thing in other posts, the culprit is the Sony chip. But going back to the problem, the issue started last week, coincidentally with the release of the GPS "fix". My prime suspect is the "new" CPE file that contains the hint information to help locking the satellites. IMHO, that file is not backward compatible, and this is a bad bad thing in software development. 

If you don't want to update then you will continue to have a problem. The only solution that will be offered from Garmin is to update.