Can't connect to network with TL-WN722N (AR9271) USB adapter

Question

I already tried couple guides to solve my problem, but still I am not able to connect with my TL-WN722N to wifi network.

Device is up and recognized.

joe@G580:~$ lsusb
Bus 001 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
Bus 002 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
Bus 003 Device 002: ID 09da:000e A4 Tech Co., Ltd 
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 003: ID 0cf3:9271 Atheros Communications, Inc. AR9271 802.11n
Bus 001 Device 004: ID 0bda:0129 Realtek Semiconductor Corp. 
Bus 002 Device 003: ID 174f:1468 Syntek 

joe@G580:~$ iwconfig
eth0      no wireless extensions.

lo        no wireless extensions.

wlan0     IEEE 802.11bgn  ESSID:off/any  
          Mode:Managed  Access Point: Not-Associated   Tx-Power=off   
          Retry  long limit:7   RTS thr:off   Fragment thr:off
          Power Management:off

joe@G580:~$ sudo lshw -C network
[sudo] password for joe: 
  *-network               
       description: Ethernet interface
       product: AR8162 Fast Ethernet
       vendor: Qualcomm Atheros
       physical id: 0
       bus info: pci@0000:02:00.0
       logical name: eth0
       version: 10
       serial: xx:xx:xx:xx:xx:xx
       size: 100Mbit/s
       capacity: 100Mbit/s
       width: 64 bits
       clock: 33MHz
       capabilities: pm pciexpress msi msix bus_master cap_list ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd autonegotiation
       configuration: autonegotiation=on broadcast=yes driver=alx driverversion=1.2.3 duplex=full firmware=N/A ip=192.168.1.31 latency=0 link=yes multicast=yes port=twisted pair speed=100Mbit/s
       resources: irq:16 memory:d3900000-d393ffff ioport:2000(size=128)
  *-network DISABLED
       description: Wireless interface
       physical id: 3
       bus info: usb@1:1.2
       logical name: wlan0
       serial: xx:xx:xx:xx:xx:xx
       capabilities: ethernet physical wireless
       configuration: broadcast=yes driver=ath9k_htc driverversion=3.8.0-35-generic firmware=1.4 link=no multicast=yes wireless=IEEE 802.11bgn

joe@G580:~$ rfkill list
0: ideapad_bluetooth: Bluetooth
    Soft blocked: no
    Hard blocked: no
1: phy0: Wireless LAN
    Soft blocked: no
    Hard blocked: no

So I already installed drivers and firmware. I tried to install Win drivers with ndiswrapper, but I got an error message that ndiswrapper is not installed(solving this issue is in progress). This device was working before I had to reinstall Ubuntu 12.04. Now I can see avaible wifi networks, but I'm not able to connect to any of them. When I try to connect to wifi network, it's still trying to connect again and again but it fails every time.

I'm looking for your advices(I'm really desperate now!)

Thanks!

Solution

Now I feel like a fool!

After couple days of trying to solve this issue I've found this guide:

WirelessTroubleshootingProcedure

so I used the command from step 2 - the long one.

In the output I've found that TL-WN722N support channels from 1 to 11. Try to guess what is the channel of my network...yes, it is channel 13.

Sollution found, problem solved.

We can close this topic :-D

Comments

[gavenkoa]

I trap into same problem with TL-WN722N. iwlist chan show me that device support only channel 1-11 but I set channel to 12 in my router to better avoid interference with another wifi devices.