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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
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  • 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