Oops...

Erm...

Turned out that my router and modem have a love/hate relationship, the later doesn't like the former poking insistently when it's not up to it.

I gotta manually stop the router trying to connect when the modem is in bad mood.

Reboot the modem, let it calm down a bit, then only manually ask the router to connect (gently).

Troublesome, but works.

Now that they have kissed and made up, I can go online again, yay!

Good thing I haven't called tmnet. =P

Okay okay, it's my bad, I will go stand in the corner facing the wall now...