you'll need to change the 'fake' supl server's IP address in /etc/hosts to maybe 127.0.0.2.

after making the change, either reboot the device or do:
Btw, the supl proxy does NOT necessarily lead to a gps lock. What it does is to inform your gps/modem about the satelites in your area (without the gps having to find them on its own). the gps must still exchange data with the sats, and if it fails, you're not getting a lock, even though a satelite monitor will show a dozen visible (available) sats

Ok got it. But the command should output what is exchanged with the proxy/server isn't it?

Ok, Ill change the IP, reboot and post asap (tho a n900 takes some time to do so .-))

After IP change and rebooting:

No changes, no output from supl-proxy and immediate exit 214 after modrana has started.

Edit: the same happends with location-test-gui instead of modrana:
Right after reboot,
Using location-test-gui, number of satellites in GNSS mode before launching the proxy: 6 to 9.
Launching the proxy and relaunch location-test-gui in AGNSS mode,
Same number of sat and same exit without output.

When using supl.google.com directly ( set in location agps settings and with corresponding IP in /etc/hosts), I don't get more satellites but the lock can happen within less than one minute.

------------

(good/bad) Question:
On his page, the developper says:

Does that mean that there is any hardcoded proxy name into the program after compilation that could not correspond to the settings we entered?

I searched into the sources but what I found might bi some old default or fallback servers isn't it?

And as ,iirc, makefile is generated before making, it cannot be there, so what was used for compilation, I don't know...

supl.nokia.com is hardcoded, yes, and used when you don't supply your own supl server. this is not the problem you are encountering, since you do supply a supl server (supl.google.com) when running the proxy.

the supl domain name you created should be used in 3 places: (1) in the domain of the certificate you created, (2) in Settings > Location, and (3) in /etc/hosts. Can you confirm this is true in your case?

Yes, I confirm it is absolutely true in my case.
I have deleted what was in /home/user/supl and then recreated with the instructions given in the wiki for the new domain name corresponding to what is in settings > location and /etc/hosts. Absolutely.

Then I'm not sure what's up. Perhaps someone else can try the wiki steps and reproduce, or you can try strace or other tools.

PROGRESS --- so simple
Great, thanks, I installed and used strace.
A lot of ununderstandable things came out but,
I saw somewhere in the output "network is unreachable".
I switched the connection from wifi to gprs and it worked, a lock came in seconds.
Though the ADSL modem firewall is inactive, it is not working via wifi nor usb networking.
Any clue of the reason? (all prior tests with wifi were done in "phone mode" but without gprs internet connection)

WIKI
So now, I can add some infos to the wiki. I guess I shouldn't delete or add into your text but below it with an "edit:". Am I right?
Also, how can I login to the wiki. Seems not to be the same account than here. (searched on different places in maemo.org but found nothing about that).

Network problem ... no surprise there

Wiki - edit it as best as you see fit. Even if you adjust/remove parts of the existing text, if anyone ever needs to compare, Wiki has a history, like Git

I forgot how to create a Wiki account - I remember some things need you to register a Garage Account, https://garage.maemo.org/account/register.php

I can't be too sure if wiki was one of those, but it's possible. Maybe someone more knowledgeable will chime in

History, great, I can dive!
Ok, I'll investigate.
(btw, the url is https://garage.maemo.org/account/register.php, not https://garage.maemo.org/account-register.php)

Yes, wiki should be garage account as well as bugs.
Share all one account.

Only TMO needs a different one.

And about network: I do remember that for A-GPS only mobile network is working on N900 (no idea why but it is), WiFibdoes not help.