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I just have done a fresh install of Raspbian Buster on a 3b+ on my home network. The box has been working fine for years running wheezy. The box isn't connected by ethernet.

Trying to set up Localisation prefs and the Wifi Country is greyed out and the Network icon on the top-right of desktop says no interfaces found.

Have tried setting the country name in raspi-config options but get an error saying N2 error.

Have tried:

nano /etc/wpa_supplicant/wpa_supplicant.conf

and edited to read:

   country=GB
_interface=DIR=/var/run/wpa_supplicant GROUP=netdev
update_config=1
network={
    ssid="<network_ssid>"
    psk="<network_password>"
}

but still can't find wifi networks or change Wifi country in preferences.

Does anyone help? Thanks

M. Rostami
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user1106252
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1 Answers1

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Configure the /etc/wpa_supplicant/wpa_supplicant.conf as the link below because it has not configured in a true way and some part of it has lost:

Setting WiFi up via the command line

My /etc/wpa_supplicant/wpa_supplicant.conf is like this and is working:

ctrl_interface=DIR=/var/run/wpa_supplicant GROUP=netdev
update_config=1
country=IR

network={
     ssid="testssid"
     psk="tesspass"
}

Now, if you check the interface list by ifconfig you would not see the wlan0 on the list. So, you may found some solution that tells you to enable the wlan0 by ifconfig wlan0 up but it doesn't work and would give Operation not possible due to RF-kill as the output.

By the following procedure, it will be solved: 

iwconfig wlan0 txpower off

sudo rfkill unblock all

Now you can bring it up: 

ifconfig wlan0 up

Check the wlan0 state by ifconfig, iwconfig or GUI on the top of the screen and you would see that it has worked.

References:

M. Rostami
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  • Hi, thanks for replying. When I type ifconfig wlan0 up I get the message wlan0: ERROR while getting interface flags: No such device. So I continue and type iwconfig wlan0 txpower off and get the message Error for wireless request "Set Tx Power (8B26) : SET failed on device wlan0 ; Operation not permitted – user1106252 Mar 25 '20 at 16:06
  • forgot to say, i edited my wpa_supplicant to look like yours except for country=GB – user1106252 Mar 25 '20 at 16:13
  • @M.Rostami Have in mind that the OP is still using Wheezy, e.g. rfkill isn't needed and maybe other things are different? – Ingo Mar 25 '20 at 16:22
  • I'm using a fresh install of buster. Just tried those commands prefixed by sudo and got exactly the same error messages. – user1106252 Mar 25 '20 at 16:23
  • @user1106252 You should add this important information to your question. Please edit it. – Ingo Mar 25 '20 at 16:24
  • it's in the first line of my question. – user1106252 Mar 25 '20 at 16:25
  • Ah, sorry to all for confusion, didn't read that carefully. – Ingo Mar 25 '20 at 16:25
  • no probs :) mate – user1106252 Mar 25 '20 at 16:26
  • Operation not permitted, so run the commands by sudo at first on them. -- Are you sure the wireless card name is wlan0? Check it by iwconfig. – M. Rostami Mar 25 '20 at 16:31
  • Ran iwconfig and got this output: eth0 no wireless extensions lo no wireless extensions – user1106252 Mar 25 '20 at 16:34
  • It seems that it's a problem with the wireless card. Check this thread. Add dtoverlay=pi3-enable-wifi to /boot/config.txt and reboot the pi. – M. Rostami Mar 25 '20 at 16:39
  • I took your point about it possibly being a wifi card problem so I fished out another b 1.1 that I had lying around and tried all the steps you spelled out earlier on that. When i type ifconfig the wlan0 appears. The icon in the top-right of the screen show eth0: Link is down and wlan0 is not associated. – user1106252 Mar 25 '20 at 16:54
  • Well, associate the wlan0 to your SSID by /etc/wpa_supplicant/wpa_supplicant.conf. Hope it help you. – M. Rostami Mar 25 '20 at 16:57
  • Also, just noted that each time I go into preferences that the Wifi country is no longer greyed out but eah time it says 'Country not set' ... I set it to GB but when I go back in it says not set... – user1106252 Mar 25 '20 at 16:58
  • Feel free to configure your device by the terminal. You may face a problem or error. Just search that and google will give some related results. Using the GUI for changing these configurations is not recommended. – M. Rostami Mar 25 '20 at 17:02