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Thread: wireless link up but no connectivity

  1. #1
    Join Date
    Apr 2013
    Beans
    10

    wireless link up but no connectivity

    I have a core i3 PC with dual boot Wndows 7 and Ubuntu 12.04. My eth0 is working. but no wlan connectivity.I have a DWA-125 D-linkwireless adaptor. I followed forum posts and have lost track of all modifications. Finally reinstalled Ubuntu by formatting only root. The problem persists. I am posting the outputs i get after following the instuctions on http://ubuntuforums.orgshowthread.php?t=1425564. Any help will be appreciated


    Code:
    user:~$sudo modprobe rt3070sta
    FATAL: Module rt3070sta not found.
    Code:
    user:~$ iwconfig
    lo        no wireless extensions.
    wlan0     IEEE 802.11bgn  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        
    eth0      no wireless extensions.
    Code:
    user:~$ dmesg | grep -e rt2 -e rt3
    [   19.627768] Registered led device: rt2800usb-phy0::radio
    [   19.627783] Registered led device: rt2800usb-phy0::assoc
    [   19.627797] Registered led device: rt2800usb-phy0::quality
    [   19.627814] usbcore: registered new interface driver rt2800usb
    [   19.821407] rtusb init rt2870 --->
    [   19.821440] usbcore: registered new interface driver rt2870
    Code:
    user:~$ lsusb
    ......
    Bus 001 Device 005: ID 07d1:3c16 D-Link System DWA-125 Wireless N 150 Adapter(rev.A2) [Ralink RT3070]
    ......
    Code:
    user:~$ nm-tool
    
    NetworkManager Tool
    
    State: connected (global)
    
    - Device: wlan0  [user] ---------------------------------------------------------
      Type:              802.11 WiFi
      Driver:            rt2800usb
      State:             connected
      Default:           no
      HW Address:        1C:BD:B9:81:3A:8F
    
      Capabilities:
        Speed:           54 Mb/s
    
      Wireless Properties
        WEP Encryption:  yes
        WPA Encryption:  yes
        WPA2 Encryption: yes
    
      Wireless Access Points (* = current AP)
        *user:            Infra, 00:FD:07:9C:78:5B, Freq 2412 MHz, Rate 54 Mb/s, Strength 67 WEP
    
      IPv4 Settings:
        Address:         192.168.1.85
        Prefix:          24 (255.255.255.0)
        Gateway:         192.168.1.1
    
        DNS:             59.185.0.23
        DNS:             59.179.243.70
        DNS:             203.94.243.70
    
    
    - Device: eth0  [Wired connection 1] -------------------------------------------
      Type:              Wired
      Driver:            e1000e
      State:             connected
      Default:           yes
      HW Address:        70:71:BC:3C:3D:BC
    
      Capabilities:
        Carrier Detect:  yes
        Speed:           100 Mb/s
    
      Wired Properties
        Carrier:         on
    
      IPv4 Settings:
        Address:         192.168.1.13
        Prefix:          24 (255.255.255.0)
        Gateway:         192.168.1.1
    
        DNS:             59.185.0.23
        DNS:             59.179.243.70
        DNS:             203.94.243.70
    Last edited by gsaro; June 28th, 2013 at 05:40 PM.

  2. #2
    Join Date
    Aug 2005
    Location
    South Carolina, USA
    Beans
    19,956
    Distro
    Ubuntu 14.04 Trusty Tahr

    Re: wireless link up but no connectivity

    Please detach the ethernet and try again.
    - Device: wlan0 [user] ---------------------------------------------------------
    Type: 802.11 WiFi
    Driver: rt2800usb
    State: connected
    Default: no
    HW Address: 1C:BD:B9:81:3A:8F

    Capabilities:
    Speed: 54 Mb/s
    Wireless Properties
    WEP Encryption: yes
    WPA Encryption: yes
    WPA2 Encryption: yes

    Wireless Access Points (* = current AP)
    *user: Infra, 00:FD:07:9C:78:5B, Freq 2412 MHz, Rate 54 Mb/s, Strength 67 WEP

    IPv4 Settings:
    Address: 192.168.1.85
    Prefix: 24 (255.255.255.0)
    Gateway: 192.168.1.1

    DNS: 59.185.0.23
    DNS: 59.179.243.70
    DNS: 203.94.243.70


    - Device: eth0 [Wired connection 1] -------------------------------------------
    Type: Wired
    Driver: e1000e
    State: connected
    Default: yes
    HW Address: 70:71:BC:3C:3D:BC

    Capabilities:
    Carrier Detect: yes
    Speed: 100 Mb/s

    Wired Properties
    Carrier: on

    IPv4 Settings:
    Address: 192.168.1.13
    Prefix: 24 (255.255.255.0)
    Gateway: 192.168.1.1

    DNS: 59.185.0.23
    DNS: 59.179.243.70
    DNS: 203.94.243.70
    It is impossible to troubleshoot wireless connectivity problems when you are connected with ethernet.

    "Oh, Ubuntu, you are my favorite Linux-based operating system" --Dr. Sheldon Cooper, Ph.D.

  3. #3
    Join Date
    Apr 2013
    Beans
    10

    Re: wireless link up but no connectivity

    :) Ok. The various outputs with ethernet disconnected is given below.

    Code:
    user:~$ iwconfig
    lo        no wireless extensions.
    
    wlan0     IEEE 802.11bgn  ESSID:"user"  
              Mode:Managed  Frequency:2.412 GHz  Access Point: 00:FD:07:9C:78:5B   
              Bit Rate=48 Mb/s   Tx-Power=20 dBm   
              Retry  long limit:7   RTS thr:off   Fragment thr:off
              Power Management:on
              Link Quality=70/70  Signal level=-35 dBm  
              Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
              Tx excessive retries:0  Invalid misc:909   Missed beacon:0
    
    eth0      no wireless extensions.
    Code:
    dmesg | grep -e rt2 -e rt3
    [   19.732914] Registered led device: rt2800usb-phy0::radio
    [   19.732930] Registered led device: rt2800usb-phy0::assoc
    [   19.732944] Registered led device: rt2800usb-phy0::quality
    [   19.732959] usbcore: registered new interface driver rt2800usb
    Code:
    user:~$ nm-tool
    
    NetworkManager Tool
    
    State: connected (global)
    
    - Device: wlan0  [user] ---------------------------------------------------------
      Type:              802.11 WiFi
      Driver:            rt2800usb
      State:             connected
      Default:           yes
      HW Address:        1C:BD:B9:81:3A:8F
    
      Capabilities:
        Speed:           54 Mb/s
    
      Wireless Properties
        WEP Encryption:  yes
        WPA Encryption:  yes
        WPA2 Encryption: yes
    
      Wireless Access Points (* = current AP)
        *user:            Infra, 00:FD:07:9C:78:5B, Freq 2412 MHz, Rate 54 Mb/s, Strength 79 WEP
    
      IPv4 Settings:
        Address:         192.168.1.85
        Prefix:          24 (255.255.255.0)
        Gateway:         192.168.1.1
    
        DNS:             59.185.0.23
        DNS:             59.179.243.70
        DNS:             203.94.243.70
    
    
    - Device: eth0 -----------------------------------------------------------------
      Type:              Wired
      Driver:            e1000e
      State:             unavailable
      Default:           no
      HW Address:        70:71:BC:3C:3D:BC
    
      Capabilities:
        Carrier Detect:  yes
        Speed:           100 Mb/s
    
      Wired Properties
        Carrier:         off

  4. #4
    Join Date
    Aug 2005
    Location
    South Carolina, USA
    Beans
    19,956
    Distro
    Ubuntu 14.04 Trusty Tahr

    Re: wireless link up but no connectivity

    wlan0 IEEE 802.11bgn ESSID:"user"
    Mode:Managed Frequency:2.412 GHz Access Point: 00:FD:07:9C:78:5B
    Bit Rate=48 Mb/s Tx-Power=20 dBm
    Retry long limit:7 RTS thr:off Fragment thr:off
    Power Management:on
    Link Quality=70/70 Signal level=-35 dBm
    Now you look well and truly connected! Can you scan?
    Code:
    sudo iwlist wlan0 scan
    Ping?
    Code:
    ping -c3 8.8.8.8
    ping -c3 192.168.1.1
    ping -c3 www.google.com
    "Oh, Ubuntu, you are my favorite Linux-based operating system" --Dr. Sheldon Cooper, Ph.D.

  5. #5
    Join Date
    Apr 2013
    Beans
    10

    Re: wireless link up but no connectivity

    Thank you for your reply. The outputs for the two commands are given below

    Code:
     :~$ping -c3 192.168.1.1
    PING 192.168.1.1 (192.168.1.1) 56(84) bytes of data.
    From 192.168.1.85 icmp_seq=1 Destination Host Unreachable
    From 192.168.1.85 icmp_seq=2 Destination Host Unreachable
    From 192.168.1.85 icmp_seq=3 Destination Host Unreachable

    Code:
    :~$ sudo iwlist wlan0 scan
    wlan0     Scan completed :
              Cell 01 - Address: 00:FD:07:9C:78:5B
                        Channel:1
                        Frequency:2.412 GHz (Channel 1)
                        Quality=67/70  Signal level=-43 dBm  
                        Encryption key:on
                        ESSID:"mywlan"
                        Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s
                        Bit Rates:6 Mb/s; 9 Mb/s; 12 Mb/s; 18 Mb/s; 24 Mb/s
                                  36 Mb/s; 48 Mb/s; 54 Mb/s
                        Mode:Master
                        Extra:tsf=00000013c8b146d5
                        Extra: Last beacon: 76ms ago
                        IE: Unknown: 0003706164
                        IE: Unknown: 010482848B96
                        IE: Unknown: 030101
                        IE: Unknown: 2A0104
                        IE: Unknown: 32080C1218243048606C
              Cell 02 - Address: 00:FD:07:9C:78:5B
                        Channel:1
                        Frequency:2.412 GHz (Channel 1)
                        Quality=67/70  Signal level=-43 dBm  
                        Encryption key:on
                        ESSID:""
                        Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s
                        Bit Rates:6 Mb/s; 9 Mb/s; 12 Mb/s; 18 Mb/s; 24 Mb/s
                                  36 Mb/s; 48 Mb/s; 54 Mb/s
                        Mode:Master
                        Extra:tsf=00000013c897775c
                        Extra: Last beacon: 1768ms ago
                        IE: Unknown: 0000
                        IE: Unknown: 010482848B96
                        IE: Unknown: 030101
                        IE: Unknown: 050400010000
                        IE: Unknown: 2A0104
                        IE: Unknown: 32080C1218243048606C

  6. #6
    Join Date
    Aug 2005
    Location
    South Carolina, USA
    Beans
    19,956
    Distro
    Ubuntu 14.04 Trusty Tahr

    Re: wireless link up but no connectivity

    Ahh! You are trying to connect to a hidden network. Is the 192.168.1.85 address one that was assigned by the router or did you set a static IP address? Did it by chance connect and then drop? Are there any clues here?
    Code:
    cat /var/log/syslog | grep -e etwork -e wlan | tail -n25
    "Oh, Ubuntu, you are my favorite Linux-based operating system" --Dr. Sheldon Cooper, Ph.D.

  7. #7
    Join Date
    Apr 2013
    Beans
    10

    Re: wireless link up but no connectivity

    Quote Originally Posted by chili555 View Post
    Ahh! You are trying to connect to a hidden network. Is the 192.168.1.85 address one that was assigned by the router or did you set a static IP address? Did it by chance connect and then drop? Are there any clues here?
    Sir,
    I set a static IP. It had connected and dropped when the IP V.6 address was DHCP. Presently I am ignoring IP V6 addressing. I have also recently changed from WPA-WPA2 to WEP 128bit. There is no problem on my laptop running the same version of ubuntu with WEP. I am attaching output for
    Code:
    cat /var/log/syslog | grep -e etwork -e wlan | tail -n25
    Attached Files Attached Files
    Last edited by gsaro; June 26th, 2013 at 06:13 AM.

  8. #8
    Join Date
    Aug 2005
    Location
    South Carolina, USA
    Beans
    19,956
    Distro
    Ubuntu 14.04 Trusty Tahr

    Re: wireless link up but no connectivity

    In syslog, it appears to connect perfectly well. We see no reason why it doesn't connect as expected or any evidence that it connects and drops. With no clues, we don't know what to try to fix! I suggest we dig a bit deeper. Please detach the ethernet cable, reboot so we have a clean slate and before anything else:
    Code:
    cat /var/log/syslog | egrep  'rt2|cfg8|etwork|wlan' | tail -n100 > gsaro.txt
    Find the file gsaro.txt in your user directory and paste it here and give us the link in your reply: http://paste.ubuntu.com/
    "Oh, Ubuntu, you are my favorite Linux-based operating system" --Dr. Sheldon Cooper, Ph.D.

  9. #9
    Join Date
    Apr 2013
    Beans
    10

    Re: wireless link up but no connectivity

    Sir,
    I have rebooted my PC and executed the following code in my terminal.
    Code:
     cat /var/log/syslog | egrep  'rt2|cfg8|etwork|wlan' | tail -n100 > gsaro.txt
    . The link to gsaro.txt is http://paste.ubuntu.com/5801815/

    I am also not very sure about my /etc/Wireless/RT2870STA/RT2870STA.dat . I am pasting the contents of the said file at http://paste.ubuntu.com/5802490/

    Also I rebooted my PC in network recovery mode, and saw the following message displayed twice.
    modem-manager[954] : <info> (ttSy) closed serial port

    Thanks for your help.
    Last edited by gsaro; June 27th, 2013 at 12:36 PM.

  10. #10
    Join Date
    Aug 2005
    Location
    South Carolina, USA
    Beans
    19,956
    Distro
    Ubuntu 14.04 Trusty Tahr

    Re: wireless link up but no connectivity

    Again, we see it connect seemingly perfectly. We see no disconnect or irregularities. What happens if you attempt to surf the webb immediately after a boot? What does this say?
    Code:
    nm-tool
    If you can surf, does it eventually disconnect? That's the syslog I'd love to read:
    Code:
    cat /var/log/syslog | egrep  'rt2|cfg8|etwork|wlan' | tail -n100 > gsaro_disconnect.txt
    I am also not very sure about my /etc/Wireless/RT2870STA/RT2870STA.dat .
    RT2870STA.dat is not used by the stock in-kernel rt2800usb. It is used by staging versions of rt2870sta which usually need to be compiled from source code? Did you try and fail to do so? Do we have a driver conflict going?
    "Oh, Ubuntu, you are my favorite Linux-based operating system" --Dr. Sheldon Cooper, Ph.D.

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