Apparently Thedead1440 told me that I am in open mode now (I still see some Aegis messages in Terminal mode, but perhaps they are more permissive now; didn't spend time investigating that). So I guess I'll stay in open mode for the moment.

Good to know however that a full reflash to default will make the warning to disappear, thanks.

By the way, I re-edited the /etc/X11.conf.d/nokia.conf to add a "Option XkbLayout fr" line, then used "setxkbmap -layout fr" in terminal, both as user and as root, and my keyboard keeps acting as a QWERTY one, even after reboot. Any idea, do I miss something? :/