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I'm stating in Ubuntu and I couldn't config my pci wifi card. It is seeing my network, but, when I call to connect it runs for fews seconds trying to connect and call again for the password (the password is writted right...).

My device is a Tp-link Wn881wd Atheros AR9287.

When I look at terminal "lspci" it returns the informations about the hardware.

I follow the @Otacon answer Example @otacon but at the step of run the "wpa_supplicant" it show this message bellow. Any tip?

#my terminal response to "wpa_supplicant -D wext -i wlan0 -c /etc/wpa_supplicant/wpa_conf.conf"

root@isaque-desktop:/home/isaque# wpa_supplicant -D wext -i wlan0 -c /etc/wpa_supplicant/wpa_conf.conf

Successfully initialized wpa_supplicant

Could not read interface wlan0 flags: No such device

WEXT: Could not set interface 'wlan0' UP

wlan0: Failed to initialize driver interface

Iron Banker Of Braavos
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1 Answers1

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In 16.04 the default wlan0 device does not exist, instead there is some fancy name like wlp2s0. Use this command to determine your wlan interface name:

ifconfig

After that correct your wpa supplicant init command:

wpa_supplicant -D wext -i  wlp2s0 -c /etc/wpa_supplicant/wpa_conf.conf

Remember, the wlp2s0 interface name comes from your ifconfig command, change it accordingly.

kukulo
  • 2,015
  • Hi @kukulo, I try your suggestion, but no success. I used ifconfig And it returns: enp0s20f0u12 Link encap:Ethernet Endereço de HW ......

    enp0s31f6 Link encap:Ethernet Endereço de HW 70:.......

    lo Link encap:Loopback Local
    inet end.: ........ So I try use "-i lo", next I try "-i enp0s31f6", and after "-i enp0s31f6", no success.... Any other tip?

     – Iron Banker Of Braavos Feb 23 '18 at 22:27
  • I try to run a code to "sudo wget -N -t 5 -T 10 https://github.com/UbuntuForums/wireless-info/raw/master/wireless-info && chmod +x wireless-info && ./wireless-info" and in some part there is no "wirelless extensions", look:

    enp0s31f6 no wireless extensions.

    lo no wireless extensions.

    enp0s20f0u12 no wireless extensions.

    wlp2s0 IEEE 802.11 ESSID:off/any
    Mode:Managed Access Point: Not-Associated Tx-Power=16 dBm
    Retry short limit:7 RTS thr:off Fragment thr:off Encryption key:off Power Management:off

     – Iron Banker Of Braavos Feb 23 '18 at 23:01
  • wlp2s0 is your interface name. – kukulo Feb 24 '18 at 06:49
  • Hi @kukulo, I try but it returns some kind of "busy" status, take a look: a# first part:

    root@isaque-desktop:/home/isaque# wpa_supplicant -D wext -i wlp2s0 -c /etc/wpa_supplicant/wpa_conf.conf
    Successfully initialized wpa_supplicant
    ioctl[SIOCSIWENCODEEXT]: Invalid argument ioctl[SIOCSIWSCAN]: Device or resource busy wlp2s0: CTRL-EVENT-SCAN-FAILED ret=-1 retry=1 wlp2s0: Trying to associate with 5c:e3:0e:02:7b:fb (SSID='Homesweethome' freq=2437 MHz) wlp2s0: Associated with 5c:e3:0e:02:7b:fb wlp2s0: CTRL-EVENT-DISCONNECTED bssid=5c:e3:0e:02:7b:fb reason=0

     – Iron Banker Of Braavos Feb 24 '18 at 13:06
  • #second part:

    wlp2s0: CTRL-EVENT-DISCONNECTED bssid=5c:e3:0e:02:7b:fb reason=0 ioctl[SIOCSIWSCAN]: Device or resource busy wlp2s0: CTRL-EVENT-SCAN-FAILED ret=-1 retry=1 wlp2s0: Trying to associate with 5c:e3:0e:02:7b:fb (SSID='Homesweethome' freq=2437 MHz)

    And repeats......

     – Iron Banker Of Braavos Feb 24 '18 at 13:08
  • I try to connect in the network, and all the same: open the connections window -> put the password -> it run 3 or 4 seconds -> and re-open the password window, and keep repeating.... – Iron Banker Of Braavos Feb 24 '18 at 13:17
  • Edit your wpa.conf file and supply the network and credentials – kukulo Feb 24 '18 at 13:46
  • I try to change the "wpa.conf", but is in a folder "/run/user/1000/gvfs" with permission denied, included as a "su root password". Any other suggestion. – Iron Banker Of Braavos Feb 24 '18 at 17:59
  • The strange part is, I connect using my mobile and usb cable, and it works fine. No configurations needed. But the pci express card have been very complicaded. – Iron Banker Of Braavos Feb 24 '18 at 18:00
  • with sudo nano /etc/wpa_supplicant/wpa_conf.conf you can change your wpa.conf. – kukulo Feb 24 '18 at 18:24
  • I create a " /etc/wpa_supplicant/wpa.conf " using sudo gedit with my SSID and Password, but not working until now... – Iron Banker Of Braavos Feb 24 '18 at 19:00
  • @IsaqueDaniel you have created /etc/wpa_supplicant/wpa.conf but this is the wrong file - there should be an existing file /etc/wpa_supplicant/wpa_conf.conf (note the filename is wpa_conf.conf and not wpa.conf). You can find syntax examples online to make sure you are putting the info correctly. Also instead of ifconfig to list adapters, you can use iwconfig on the command line to list wifi adpters only - anything starting with enp0* as per your examples above is an ethernet adapter and not relevant to this discussion. – flith Jul 05 '18 at 06:50