Hi Emanuele,
I saw the known words in your listing—
Operation not possible due to RF-kill
RF-kill is hardware switch to power on/off your Wi-Fi card. I have this one in my netbook, and it work, and I can switch off my Wi-Fi card.
My RF-kill switch is separate slide-key. But on your machine it can be as Fn+Fx key combination. Look more closely to find RF-kill switch.
That would be the easiest solution!
+++
Oh, no! I'm silly. I have just looked at your picture. Your Wi-Fi not seem like switch-offed ;)
May be it's known bug with /etc/resolv.conf and /etc/ppp/resolv.conf when you can connect to internet only under root? This bug fixed, upgrade your ppp package. No?
And my out:
tux@slitaz:~$ su
Password:
root@slitaz:/home/tux# /etc/init.d/network.sh restart
Stopping all interfaces
Killing all daemons
Shutting down wifi card
Configuring wlan0... [ OK ]
Starting wpa_supplicant for WPA-PSK...
ctrl_iface exists and seems to be in use - cannot override it
Delete '/var/run/wpa_supplicant/wlan0' manually if it is not used anymore
Failed to initialize control interface '/var/run/wpa_supplicant'.
You may have another wpa_supplicant process already running or the file was
left by an unclean termination of wpa_supplicant in which case you will need
to manually remove this file before starting wpa_supplicant again.
Starting udhcpc client on: wlan0...
Selected interface 'wlan0'
Warning: Failed to attach to wpa_supplicant.
Oops! My Wi-Fi not work. Try not to restart but start:
root@slitaz:/home/tux# /etc/init.d/network.sh start
Configuring wlan0... [ OK ]
Starting wpa_supplicant for WPA-PSK...
Starting udhcpc client on: wlan0...
Selected interface 'wlan0'
root@slitaz:/home/tux#
Ok, works. (And works in clean SliTaz 4.0 Core system, by the way).
+++
In your picture I see:
Encryption type: on
But I have
Encryption type: WPA
Try to switch between WPA, WPA2 and WEP.