Arch Linux

klenamenis

Member

Registered: 2014-07-03

Posts: 101

Cannot connect to wireless networks

Hey,

I'm struggling with my wlan connection. It's not a laptop and there's usually a lan connection, but for now I need it wireless. So I plugged my usb-stick in, checked for drivers being loaded and installed networkmanager in order to have a nice xfce4-plugin so I can configure and switch my connections graphically. However, when I select a wifi network, I enter the password when asked and the connection breaks up almost immediately. I'm quite sure it has something to do with wpa_supplicant as both networks are WPA2 encrypted. I also tried wpa_gui, but it doesn't work either. I definitly used the correct passphrases, other devices connect properly. Below are some outputs, I hope you guys have some advices for me:

lsusb | grep RT

Bus 003 Device 003: ID 148f:3070 Ralink Technology, Corp. RT2870/RT3070 Wireless Adapter

lsmod | grep rt2

rt2800usb              21418  0 
rt2x00usb               9346  1 rt2800usb
rt2800lib              76675  1 rt2800usb
rt2x00lib              39175  3 rt2x00usb,rt2800lib,rt2800usb
led_class               3611  1 rt2x00lib
mac80211              495361  3 rt2x00lib,rt2x00usb,rt2800lib
crc_ccitt               1363  1 rt2800lib
cfg80211              437959  2 mac80211,rt2x00lib
usbcore               188509  12 uas,snd_usb_audio,rt2x00usb,usb_storage,rt2800usb,snd_usbmidi_lib,ehci_hcd,ehci_pci,gspca_main,usbhid,gspca_zc3xx,xhci_hcd

ip link

1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN mode DEFAULT group default 
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
2: enp0s25: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP mode DEFAULT group default qlen 1000
    link/ether MAC_ADRESS#1 brd ff:ff:ff:ff:ff:ff
3: wlp0s20u10: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc mq state DOWN mode DORMANT group default qlen 1000
    link/ether MAC_ADRESS#2 brd ff:ff:ff:ff:ff:ff

iwconfig wlp0s20u10

wlp0s20u10  IEEE 802.11bgn  ESSID:off/any  
          Mode:Managed  Access Point: Not-Associated   Tx-Power=20 dBm   
          Retry short limit:7   RTS thr:off   Fragment thr:off
          Power Management:off

Status message of wpa_gui

Could not get status from wpa_supplicant

tomk

Forum Fellow

From: Ireland

Registered: 2004-07-21

Posts: 9,839

Re: Cannot connect to wireless networks

The Manual Setup section on the wiki's Wireless page is the best way to debug this stuff - once you have it working that way, you can put your fancy gui back on top of it.

lahwaacz

Wiki Admin

From: Czech Republic

Registered: 2012-05-29

Posts: 764

Re: Cannot connect to wireless networks

The output of 'dmesg' should reveal what's going on...

klenamenis

Member

Registered: 2014-07-03

Posts: 101

Re: Cannot connect to wireless networks

Of course, I tried but failed at

wpa_supplicant -i wlp0s20u10 -c <(wpa_passphrase SSID PASS)

Successfully initialized wpa_supplicant
Failed to open config file '/proc/self/fd/11', error: No such file or directory
Failed to read or parse configuration '/proc/file/fd/11' 

loqs

Member

Registered: 2014-03-06

Posts: 18,335

Re: Cannot connect to wireless networks

Of course, I tried but failed at

wpa_supplicant -i wlp0s20u10 -c <(wpa_passphrase SSID PASS)

Successfully initialized wpa_supplicant
Failed to open config file '/proc/self/fd/11', error: No such file or directory
Failed to read or parse configuration '/proc/file/fd/11' 

Was that command run with sudo by any chance?  That would fail as the redirecting is done by the shell not by sudo giving you the errors you see.

klenamenis

Member

Registered: 2014-07-03

Posts: 101

Re: Cannot connect to wireless networks

Was that command run with sudo by any chance?  That would fail as the redirecting is done by the shell not by sudo giving you the errors you see.

Yup... a bit emberassing I didn't think auf that

Anyway, it's giving me following output now for two different networks I'm absoloutly shure the passphrase is right (has been tested):

Successfully initialized wpa_supplicant
wlp0s20u10: CTRL-EVENT-SCAN-STARTED 
wlp0s20u10: SME: Trying to authenticate with MAC_ADRESS (SSID='SMCk' freq=2462 MHz)
wlp0s20u10: Trying to associate with MAC_ADRESS (SSID='SMCk' freq=2462 MHz)
wlp0s20u10: Associated with MAC_ADRESS
wlp0s20u10: CTRL-EVENT-DISCONNECTED bssid=MAC_ADRESS reason=3 locally_generated=1
wlp0s20u10: WPA: 4-Way Handshake failed - pre-shared key may be incorrect
wlp0s20u10: CTRL-EVENT-SSID-TEMP-DISABLED id=0 ssid="SMCk" auth_failures=1 duration=10 reason=WRONG_KEY
wlp0s20u10: CTRL-EVENT-SCAN-STARTED 
[... again and again ...]