wireless link up but no connectivity

**gsaro** · June 25th, 2013

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

**chili555** · June 25th, 2013

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.

**gsaro** · June 25th, 2013

:) 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

**chili555** · June 25th, 2013

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

**gsaro** · June 25th, 2013

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

**chili555** · June 25th, 2013

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

**gsaro** · June 26th, 2013

Originally Posted by chili555

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

**chili555** · June 26th, 2013

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/

**gsaro** · June 26th, 2013

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.

**chili555** · June 27th, 2013

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?

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