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Thread: Cannot connect to WLAN / Atheros AR5001 / Ubuntu 11.04

  1. #1
    Join Date
    Oct 2011

    Cannot connect to WLAN / Atheros AR5001 / Ubuntu 11.04

    Basically my wireless adapter sees the network but fails when obtaining ip address from dhcp. I am running ubuntu 11.04 64bit on a Toshiba Satellite laptop with an Atheros AR5001 wireless adapter using the ath5k driver. Currently connected via wired connection. The wireless will work if I boot from live usb.

    Background on the issue:
    I installed 11.04 to dual boot with win 7 and immediately after installation i had a wireless connection. However occasionally when waking from suspend it would fail to connect. This would happen maybe once every couple days or so. It would not connect even if I immediately rebooted. Usually I would just go to a wired connection or just walk away and in a few hours wake it again and it would have no problem connecting. I searched the internet for a solution and found that some had success switching to WiCD. I installed wicd and removed network manager. After that I went from an occasionally broken wireless connection to a wlan catastrophe. Could never establish a wireless connection with wicd although it could see wlan. It would always stall trying to obtain ip address regardless if I used static ip or not. I figured I was better off with network manager so I reinstalled it and removed wicd. Now I still have no wireless and there is no tray icon as there was previously with network manager. Searching for network manager in applications yields nothing but it shows it as being installed in the ubuntu software center. I decided it would be best to seek assistance before I try to "fix" it anymore.

    sudo lshw -C network
    laura@laura-Satellite-A215:~$ sudo lshw -C network
    [sudo] password for laura: 
           description: Ethernet interface
           product: RTL8101E/RTL8102E PCI Express Fast Ethernet controller
           vendor: Realtek Semiconductor Co., Ltd.
           physical id: 0
           bus info: pci@0000:0e:00.0
           logical name: eth0
           version: 01
           serial: 00:1b:38:11:8a:2f
           size: 100Mbit/s
           capacity: 100Mbit/s
           width: 64 bits
           clock: 33MHz
           capabilities: pm vpd msi pciexpress bus_master cap_list rom ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd autonegotiation
           configuration: autonegotiation=on broadcast=yes driver=r8169 driverversion=2.3LK-NAPI duplex=full ip= latency=0 link=yes multicast=yes port=MII speed=100Mbit/s
           resources: irq:43 ioport:a000(size=256) memory:f8300000-f8300fff memory:f8a00000-f8a1ffff
           description: Wireless interface
           product: AR5001 Wireless Network Adapter
           vendor: Atheros Communications Inc.
           physical id: 0
           bus info: pci@0000:14:00.0
           logical name: wlan0
           version: 01
           serial: 00:1b:9e:28:90:eb
           width: 64 bits
           clock: 33MHz
           capabilities: pm msi pciexpress msix bus_master cap_list ethernet physical wireless
           configuration: broadcast=yes driver=ath5k driverversion=2.6.38-13-generic firmware=N/A latency=0 link=no multicast=yes wireless=IEEE 802.11bg
           resources: irq:19 memory:f8200000-f820ffff
    laura@laura-Satellite-A215:~$ iwconfig
    lo        no wireless extensions.
    eth0      no wireless extensions.
    wlan0     IEEE 802.11bg  ESSID:off/any  
              Mode:Managed  Access Point: Not-Associated   Tx-Power=20 dBm   
              Retry  long limit:7   RTS thr:off   Fragment thr:off
              Power Management:off
    vboxnet0  no wireless extensions.
    sudo iwlist scan
    laura@laura-Satellite-A215:~$ sudo iwlist scan
    lo        Interface doesn't support scanning.
    eth0      Interface doesn't support scanning.
    wlan0     Scan completed :
              Cell 01 - Address: B0:E7:54:57:5F:B1
                        Frequency:2.437 GHz (Channel 6)
                        Quality=70/70  Signal level=-40 dBm  
                        Encryption key:off
                        Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 6 Mb/s; 9 Mb/s
                                  11 Mb/s; 12 Mb/s; 18 Mb/s
                        Bit Rates:24 Mb/s; 36 Mb/s; 48 Mb/s; 54 Mb/s
                        Extra: Last beacon: 330ms ago
                        IE: Unknown: 000A7279616E266C61757261
                        IE: Unknown: 010882848B0C12961824
                        IE: Unknown: 030106
                        IE: Unknown: 0706555320010B1B
                        IE: Unknown: 2A0100
                        IE: Unknown: 32043048606C
    vboxnet0  Interface doesn't support scanning.
    rfkill list all
    laura@laura-Satellite-A215:~$ rfkill list all
    0: phy0: Wireless LAN
        Soft blocked: no
        Hard blocked: no
    lspci -nnk | grep -iA2 net
    laura@laura-Satellite-A215:~$ lspci -nnk | grep -iA2 net
    0e:00.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. RTL8101E/RTL8102E PCI Express Fast Ethernet controller [10ec:8136] (rev 01)
        Subsystem: Toshiba America Info Systems Device [1179:ff00]
        Kernel driver in use: r8169
    14:00.0 Ethernet controller [0200]: Atheros Communications Inc. AR5001 Wireless Network Adapter [168c:001c] (rev 01)
        Subsystem: Askey Computer Corp. Device [144f:7128]
        Kernel driver in use: ath5k
    laura@laura-Satellite-A215:~$ lsmod
    Module                  Size  Used by
    binfmt_misc            17565  1 
    vboxnetadp             13340  0 
    vboxnetflt             28297  0 
    vboxdrv               252684  2 vboxnetadp,vboxnetflt
    parport_pc             36959  0 
    ppdev                  17113  0 
    snd_hda_codec_realtek   336771  1 
    snd_hda_intel          33176  2 
    uvcvideo               72195  0 
    snd_hda_codec         103804  2 snd_hda_codec_realtek,snd_hda_intel
    snd_hwdep              13604  1 snd_hda_codec
    radeon                982182  3 
    snd_pcm                96391  2 snd_hda_intel,snd_hda_codec
    videodev               82052  1 uvcvideo
    arc4                   12529  2 
    snd_seq_midi           13324  0 
    joydev                 17606  0 
    ath5k                 153264  0 
    snd_rawmidi            30486  1 snd_seq_midi
    v4l2_compat_ioctl32    17078  1 videodev
    ath                    23779  1 ath5k
    ttm                    76664  1 radeon
    drm_kms_helper         42394  1 radeon
    drm                   227534  5 radeon,ttm,drm_kms_helper
    snd_seq_midi_event     14899  1 snd_seq_midi
    i2c_algo_bit           13400  1 radeon
    mac80211              296672  1 ath5k
    pcmcia                 49166  0 
    snd_seq                61621  2 snd_seq_midi,snd_seq_midi_event
    tifm_7xx1              13042  0 
    snd_timer              29602  2 snd_pcm,snd_seq
    snd_seq_device         14462  3 snd_seq_midi,snd_rawmidi,snd_seq
    tifm_core              15654  1 tifm_7xx1
    psmouse                73535  0 
    edac_core              53845  0 
    yenta_socket           27846  0 
    pcmcia_rsrc            18372  1 yenta_socket
    sparse_keymap          13898  0 
    video                  19438  0 
    serio_raw              13166  0 
    sp5100_tco             13744  0 
    edac_mce_amd           23464  0 
    pcmcia_core            22569  3 pcmcia,yenta_socket,pcmcia_rsrc
    cfg80211              181865  3 ath5k,ath,mac80211
    shpchp                 37297  0 
    k8temp                 13016  0 
    lp                     17825  0 
    i2c_piix4              13303  0 
    snd                    67382  13 snd_hda_codec_realtek,snd_hda_intel,snd_hda_codec,snd_hwdep,snd_pcm,snd_rawmidi,snd_seq,snd_timer,snd_seq_device
    parport                46458  3 parport_pc,ppdev,lp
    soundcore              12680  1 snd
    snd_page_alloc         18529  2 snd_hda_intel,snd_pcm
    usbhid                 46956  0 
    hid                    91020  1 usbhid
    firewire_ohci          40370  0 
    firewire_core          62646  1 firewire_ohci
    sdhci_pci              13989  0 
    ahci                   25951  5 
    crc_itu_t              12707  1 firewire_core
    sdhci                  27387  1 sdhci_pci
    r8169                  48022  0 
    libahci                26642  1 ahci
    pata_atiixp            13165  0
    laura@laura-Satellite-A215:~$ nm-tool
    NetworkManager Tool
    State: connected
    - Device: eth0  [Auto eth0] ----------------------------------------------------
      Type:              Wired
      Driver:            r8169
      State:             connected
      Default:           yes
      HW Address:        00:1B:38:11:8A:2F
        Carrier Detect:  yes
        Speed:           100 Mb/s
      Wired Properties
        Carrier:         on
      IPv4 Settings:
        Prefix:          24 (
    - Device: wlan0 ----------------------------------------------------------------
      Type:              802.11 WiFi
      Driver:            ath5k
      State:             disconnected
      Default:           no
      HW Address:        00:1B:9E:28:90:EB
      Wireless Properties
        WEP Encryption:  yes
        WPA Encryption:  yes
        WPA2 Encryption: yes
      Wireless Access Points 
        ryan&laura:      Infra, B0:E7:54:57:5F:B1, Freq 2437 MHz, Rate 54 Mb/s, Strength 94
    Last edited by laurac1022; January 11th, 2012 at 03:20 PM. Reason: wireless works when running from live usb

  2. #2
    Join Date
    Oct 2011

    Re: Cannot connect to WLAN / Atheros AR5001 / Ubuntu 11.04 would be appreciated

  3. #3
    Join Date
    Oct 2011

    Re: Cannot connect to WLAN / Atheros AR5001 / Ubuntu 11.04


  4. #4
    Join Date
    Oct 2011

    Re: Cannot connect to WLAN / Atheros AR5001 / Ubuntu 11.04


    If there is any additional info I need to provide to get help, please someone let me know.

  5. #5
    Join Date
    Oct 2011

    Re: Cannot connect to WLAN / Atheros AR5001 / Ubuntu 11.04


  6. #6
    Join Date
    Oct 2006
    Ubuntu Development Release

    Re: Cannot connect to WLAN / Atheros AR5001 / Ubuntu 11.04

    Thread closed.

    Duplicate here :

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