12.04 a wireless connects but no Internet

**austinap** · April 27th, 2012

Hello,

I upgraded from 11.10 to 12.04 last night and now my wireless doesn't work. I'm on an institutional connection with enterprise WEP and TTLS and PAP authentication. I can connect to the network and everything looks good, but I can't actually get the Internet to work. The exact same settings worked under 11.10. Wireless card is an atheros AR9285 that I've never had any problems with before. Any help would be greatly appreciated! I love Ubuntu, but it's very frustrating that something breaks after every upgrade...

**calavier62** · April 28th, 2012

First things first, tell your system administrator to switch to more modern wireless security.

OK. Now that that's settled, why don't we have a look at your IP address and connection statistics. Let's start with some commands that will give me and other forum members more information about the interface, and your connection.

run the following commands in the terminal and paste the results. Be sure to put the respective results in their own code brackets (It's the # button in the formatting toolbar)

Code:

iwconfig

Code:

ifconfig

Code:

nm-tool

Code:

sudo lshw -C network

(this one'll take awhile)

--Camden

**austinap** · April 28th, 2012

I agree, they need to upgrade. Maybe you'll be better at convincing them than I have?

Anyhow, thanks for taking the time to help.

iwconfig

Code:

lo        no wireless extensions.

wlan0     IEEE 802.11bgn  ESSID:"athens"  
          Mode:Managed  Frequency:2.412 GHz  Access Point: 00:24:6C:AB:8F:A0   
          Bit Rate=52 Mb/s   Tx-Power=15 dBm   
          Retry  long limit:7   RTS thr:off   Fragment thr:off
          Power Management:off
          Link Quality=51/70  Signal level=-59 dBm  
          Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
          Tx excessive retries:0  Invalid misc:1   Missed beacon:0

eth0      no wireless extensions.

ifconfig

Code:

eth0      Link encap:Ethernet  HWaddr f0:4d:a2:f4:c9:7d  
          UP BROADCAST MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)
          Interrupt:44 Base address:0x8000 

lo        Link encap:Local Loopback  
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:16436  Metric:1
          RX packets:26041 errors:0 dropped:0 overruns:0 frame:0
          TX packets:26041 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:2937526 (2.9 MB)  TX bytes:2937526 (2.9 MB)

wlan0     Link encap:Ethernet  HWaddr c0:f8:da:5f:14:89  
          inet addr:156.111.131.98  Bcast:156.111.131.255  Mask:255.255.254.0
          inet6 addr: fe80::c2f8:daff:fe5f:1489/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:29691 errors:0 dropped:0 overruns:0 frame:0
          TX packets:718 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:1661474 (1.6 MB)  TX bytes:120089 (120.0 KB)

nm-tool

Code:

NetworkManager Tool

State: connected (global)

- Device: eth0 -----------------------------------------------------------------
  Type:              Wired
  Driver:            r8169
  State:             unavailable
  Default:           no
  HW Address:        F0:4D:A2:F4:C9:7D

  Capabilities:
    Carrier Detect:  yes

  Wired Properties
    Carrier:         off


- Device: wlan0  [athens] ------------------------------------------------------
  Type:              802.11 WiFi
  Driver:            ath9k
  State:             connected
  Default:           yes
  HW Address:        C0:F8:DA:5F:14:89

  Capabilities:
    Speed:           39 Mb/s

  Wireless Properties
    WEP Encryption:  yes
    WPA Encryption:  yes
    WPA2 Encryption: yes

  Wireless Access Points (* = current AP)
    athens:          Infra, 00:24:6C:AB:93:D0, Freq 2412 MHz, Rate 54 Mb/s, Strength 52 WPA WPA2 Enterprise
    Old Apartment:   Infra, 00:21:29:D6:33:E5, Freq 2462 MHz, Rate 54 Mb/s, Strength 44 WPA WPA2
    athens:          Infra, 00:24:6C:AB:A6:80, Freq 2462 MHz, Rate 54 Mb/s, Strength 27 WPA WPA2 Enterprise
    athens:          Infra, 00:24:6C:AB:B1:00, Freq 2437 MHz, Rate 54 Mb/s, Strength 41 WPA WPA2 Enterprise
    athens:          Infra, 00:24:6C:AB:B2:20, Freq 2462 MHz, Rate 54 Mb/s, Strength 48 WPA WPA2 Enterprise
    athens:          Infra, 00:24:6C:AB:AA:70, Freq 2462 MHz, Rate 54 Mb/s, Strength 50 WPA WPA2 Enterprise
    athens:          Infra, 00:24:6C:AB:A6:D0, Freq 2437 MHz, Rate 54 Mb/s, Strength 38 WPA WPA2 Enterprise
    athens:          Infra, 00:24:6C:AB:99:90, Freq 2462 MHz, Rate 54 Mb/s, Strength 65 WPA WPA2 Enterprise
    athens:          Infra, 00:24:6C:AB:B2:50, Freq 2412 MHz, Rate 54 Mb/s, Strength 67 WPA WPA2 Enterprise
    athens:          Infra, 00:24:6C:AB:8F:A0, Freq 2412 MHz, Rate 54 Mb/s, Strength 60 WPA WPA2 Enterprise
    *athens:         Infra, 00:24:6C:AB:B3:10, Freq 2437 MHz, Rate 54 Mb/s, Strength 59 WPA WPA2 Enterprise

  IPv4 Settings:
    Address:         156.111.131.98
    Prefix:          23 (255.255.254.0)
    Gateway:         156.111.130.1

    DNS:             156.111.60.150
    DNS:             156.111.70.150
    DNS:             156.145.13.101

sudo lshw -C network

Code:

  *-network               
       description: Wireless interface
       product: AR9285 Wireless Network Adapter (PCI-Express)
       vendor: Atheros Communications Inc.
       physical id: 0
       bus info: pci@0000:03:00.0
       logical name: wlan0
       version: 01
       serial: c0:f8:da:5f:14:89
       width: 64 bits
       clock: 33MHz
       capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
       configuration: broadcast=yes driver=ath9k driverversion=3.2.0-24-generic firmware=N/A ip=156.111.131.98 latency=0 link=yes multicast=yes wireless=IEEE 802.11bgn
       resources: irq:17 memory:fb100000-fb10ffff
  *-network
       description: Ethernet interface
       product: RTL8111/8168B PCI Express Gigabit Ethernet controller
       vendor: Realtek Semiconductor Co., Ltd.
       physical id: 0
       bus info: pci@0000:04:00.0
       logical name: eth0
       version: 06
       serial: f0:4d:a2:f4:c9:7d
       size: 10Mbit/s
       capacity: 1Gbit/s
       width: 64 bits
       clock: 33MHz
       capabilities: pm msi pciexpress msix vpd bus_master cap_list ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd 1000bt 1000bt-fd autonegotiation
       configuration: autonegotiation=on broadcast=yes driver=r8169 driverversion=2.3LK-NAPI duplex=half firmware=rtl8168e-3_0.0.4 03/27/12 latency=0 link=no multicast=yes port=MII speed=10Mbit/s
       resources: irq:44 ioport:d000(size=256) memory:da104000-da104fff memory:da100000-da103fff

**mobisallen** · April 28th, 2012

u need to make a new wireless connection. because it happens when your connection has got some problems

**whistlerspa** · April 28th, 2012

Do you have a cable connection as well? I find that I needed to pull out my ethernet cable if the wifi is active. As soon as I do internet works again.

**austinap** · April 28th, 2012

I don't have a an ethernet cable plugged in, and unfortunately don't even have a hardwire connection available. I tried deleting the wired connection shown under "Network Connections", but that didn't seem to help. I also deleted and re-created the wireless connection, but it's still the same thing. It connects normally like it did before the upgrade, but unable to ping anything. Interestingly, I just tried entering an incorrect password, and it still goes through and says I'm connected, so I don't know what's up with that. I know this is a weird connection to troubleshoot and that our system is outdated, but I don't really have the option to update the wireless here, and it's frustrating that it worked perfectly well before the 11.10 -> 12.04 upgrade.

Here's some more log data after deleting the wired connection and remaking the wireless connection:
sudo cat /var/log/syslog | grep etwork | tail -n40

Code:

Apr 28 06:47:14 austin-Inspiron-620 NetworkManager[943]: <info>   nameserver '156.111.60.150'
Apr 28 06:47:14 austin-Inspiron-620 NetworkManager[943]: <info>   nameserver '156.111.70.150'
Apr 28 06:47:14 austin-Inspiron-620 NetworkManager[943]: <info>   nameserver '156.145.13.101'
Apr 28 06:47:14 austin-Inspiron-620 NetworkManager[943]: <info>   domain name 'cpmc.columbia.edu'
Apr 28 06:47:14 austin-Inspiron-620 NetworkManager[943]: <info> Activation (wlan0) Stage 5 of 5 (IPv4 Configure Commit) scheduled...
Apr 28 06:47:14 austin-Inspiron-620 NetworkManager[943]: <info> Activation (wlan0) Stage 5 of 5 (IPv4 Commit) started...
Apr 28 06:47:15 austin-Inspiron-620 NetworkManager[943]: <info> DNS: starting dnsmasq...
Apr 28 06:47:15 austin-Inspiron-620 NetworkManager[943]: <info> (wlan0): writing resolv.conf to /sbin/resolvconf
Apr 28 06:47:15 austin-Inspiron-620 NetworkManager[943]: <info> (wlan0): device state change: ip-config -> activated (reason 'none') [70 100 0]
Apr 28 06:47:15 austin-Inspiron-620 NetworkManager[943]: <info> (wlan0): roamed from BSSID 00:24:6C:AB:99:90 (athens) to 00:24:6C:AB:8F:A0 (athens)
Apr 28 06:47:15 austin-Inspiron-620 NetworkManager[943]: <info> Policy set 'athens' (wlan0) as default for IPv4 routing and DNS.
Apr 28 06:47:15 austin-Inspiron-620 NetworkManager[943]: <info> Activation (wlan0) successful, device activated.
Apr 28 06:47:15 austin-Inspiron-620 NetworkManager[943]: <info> Activation (wlan0) Stage 5 of 5 (IPv4 Commit) complete.
Apr 28 06:47:20 austin-Inspiron-620 NetworkManager[943]: <info> (wlan0): device state change: activated -> disconnected (reason 'user-requested') [100 30 39]
Apr 28 06:47:20 austin-Inspiron-620 NetworkManager[943]: <info> (wlan0): deactivating device (reason 'user-requested') [39]
Apr 28 06:47:20 austin-Inspiron-620 NetworkManager[943]: <info> (wlan0): canceled DHCP transaction, DHCP client pid 16994
Apr 28 06:47:21 austin-Inspiron-620 NetworkManager[943]: <info> DNS: starting dnsmasq...
Apr 28 06:47:21 austin-Inspiron-620 NetworkManager[943]: <info> (wlan0): writing resolv.conf to /sbin/resolvconf
Apr 28 06:47:21 austin-Inspiron-620 NetworkManager[943]: <info> (wlan0): supplicant interface state: completed -> disconnected
Apr 28 06:47:28 austin-Inspiron-620 NetworkManager[943]:    keyfile: removed /etc/NetworkManager/system-connections/athens.
austin@austin-Inspiron-620:~$ sudo cat /var/log/syslog | grep etwork | tail -n40
Apr 28 06:54:21 austin-Inspiron-620 NetworkManager[943]: <info> (wlan0): supplicant interface state: scanning -> authenticating
Apr 28 06:54:21 austin-Inspiron-620 NetworkManager[943]: <info> (wlan0): supplicant interface state: authenticating -> associating
Apr 28 06:54:21 austin-Inspiron-620 NetworkManager[943]: <info> (wlan0): supplicant interface state: associating -> associated
Apr 28 06:54:23 austin-Inspiron-620 NetworkManager[943]: <info> (wlan0): supplicant interface state: associated -> 4-way handshake
Apr 28 06:54:24 austin-Inspiron-620 NetworkManager[943]: <info> (wlan0): supplicant interface state: 4-way handshake -> completed
Apr 28 06:54:24 austin-Inspiron-620 NetworkManager[943]: <info> Activation (wlan0/wireless) Stage 2 of 5 (Device Configure) successful.  Connected to wireless network 'athens'.
Apr 28 06:54:24 austin-Inspiron-620 NetworkManager[943]: <info> Activation (wlan0) Stage 3 of 5 (IP Configure Start) scheduled.
Apr 28 06:54:24 austin-Inspiron-620 NetworkManager[943]: <info> Activation (wlan0) Stage 3 of 5 (IP Configure Start) started...
Apr 28 06:54:24 austin-Inspiron-620 NetworkManager[943]: <info> (wlan0): device state change: config -> ip-config (reason 'none') [50 70 0]
Apr 28 06:54:24 austin-Inspiron-620 NetworkManager[943]: <info> Activation (wlan0) Beginning DHCPv4 transaction (timeout in 45 seconds)
Apr 28 06:54:24 austin-Inspiron-620 NetworkManager[943]: <info> dhclient started with pid 17245
Apr 28 06:54:24 austin-Inspiron-620 NetworkManager[943]: <info> Activation (wlan0) Beginning IP6 addrconf.
Apr 28 06:54:24 austin-Inspiron-620 NetworkManager[943]: <info> Activation (wlan0) Stage 3 of 5 (IP Configure Start) complete.
Apr 28 06:54:24 austin-Inspiron-620 NetworkManager[943]: <info> (wlan0): DHCPv4 state changed nbi -> preinit
Apr 28 06:54:25 austin-Inspiron-620 NetworkManager[943]: <info> (wlan0): DHCPv4 state changed preinit -> bound
Apr 28 06:54:25 austin-Inspiron-620 NetworkManager[943]: <info>   address 156.111.131.98
Apr 28 06:54:25 austin-Inspiron-620 NetworkManager[943]: <info>   prefix 23 (255.255.254.0)
Apr 28 06:54:25 austin-Inspiron-620 NetworkManager[943]: <info>   gateway 156.111.130.1
Apr 28 06:54:25 austin-Inspiron-620 NetworkManager[943]: <info>   nameserver '156.111.60.150'
Apr 28 06:54:25 austin-Inspiron-620 NetworkManager[943]: <info>   nameserver '156.111.70.150'
Apr 28 06:54:25 austin-Inspiron-620 NetworkManager[943]: <info>   nameserver '156.145.13.101'
Apr 28 06:54:25 austin-Inspiron-620 NetworkManager[943]: <info>   domain name 'cpmc.columbia.edu'
Apr 28 06:54:25 austin-Inspiron-620 NetworkManager[943]: <info> Activation (wlan0) Stage 5 of 5 (IPv4 Configure Commit) scheduled...
Apr 28 06:54:25 austin-Inspiron-620 NetworkManager[943]: <info> Activation (wlan0) Stage 5 of 5 (IPv4 Commit) started...
Apr 28 06:54:26 austin-Inspiron-620 NetworkManager[943]: <info> DNS: starting dnsmasq...
Apr 28 06:54:26 austin-Inspiron-620 NetworkManager[943]: <info> (wlan0): writing resolv.conf to /sbin/resolvconf
Apr 28 06:54:26 austin-Inspiron-620 NetworkManager[943]: <info> (wlan0): device state change: ip-config -> activated (reason 'none') [70 100 0]
Apr 28 06:54:26 austin-Inspiron-620 NetworkManager[943]: <info> (wlan0): roamed from BSSID 00:24:6C:AB:99:90 (athens) to 00:24:6C:AB:B1:00 (athens)
Apr 28 06:54:26 austin-Inspiron-620 NetworkManager[943]: <info> Policy set 'athens' (wlan0) as default for IPv4 routing and DNS.
Apr 28 06:54:26 austin-Inspiron-620 NetworkManager[943]: <info> Activation (wlan0) successful, device activated.
Apr 28 06:54:26 austin-Inspiron-620 NetworkManager[943]: <info> Activation (wlan0) Stage 5 of 5 (IPv4 Commit) complete.
Apr 28 06:54:45 austin-Inspiron-620 NetworkManager[943]: <info> (wlan0): IP6 addrconf timed out or failed.
Apr 28 06:54:45 austin-Inspiron-620 NetworkManager[943]: <info> Activation (wlan0) Stage 4 of 5 (IPv6 Configure Timeout) scheduled...
Apr 28 06:54:45 austin-Inspiron-620 NetworkManager[943]: <info> Activation (wlan0) Stage 4 of 5 (IPv6 Configure Timeout) started...
Apr 28 06:54:45 austin-Inspiron-620 NetworkManager[943]: <info> Activation (wlan0) Stage 4 of 5 (IPv6 Configure Timeout) complete.
Apr 28 06:54:47 austin-Inspiron-620 NetworkManager[943]: <info> (wlan0): supplicant interface state: completed -> authenticating
Apr 28 06:54:47 austin-Inspiron-620 NetworkManager[943]: <info> (wlan0): supplicant interface state: authenticating -> associating
Apr 28 06:54:47 austin-Inspiron-620 NetworkManager[943]: <info> (wlan0): supplicant interface state: associating -> associated
Apr 28 06:54:48 austin-Inspiron-620 NetworkManager[943]: <info> (wlan0): supplicant interface state: associated -> completed
Apr 28 06:54:52 austin-Inspiron-620 NetworkManager[943]: <info> (wlan0): roamed from BSSID 00:24:6C:AB:B1:00 (athens) to 00:24:6C:AB:8F:A0 (athens)

dmesg | grep wlan | tail -n20

Code:

[50955.638592] wlan0: Wrong control channel in association response: configured center-freq: 2412 hti-cfreq: 2462  hti->control_chan: 11 band: 0.  Disabling HT.
[50963.183144] wlan0: deauthenticating from 00:24:6c:ab:8f:a0 by local choice (reason=3)
[51382.794254] wlan0: direct probe to 00:24:6c:ab:b1:00 (try 1/3)
[51382.991635] wlan0: direct probe to 00:24:6c:ab:b1:00 (try 2/3)
[51382.995584] wlan0: direct probe responded
[51383.035508] wlan0: authenticate with 00:24:6c:ab:b1:00 (try 1)
[51383.037448] wlan0: authenticated
[51383.066217] wlan0: associate with 00:24:6c:ab:b1:00 (try 1)
[51383.081190] wlan0: RX ReassocResp from 00:24:6c:ab:b1:00 (capab=0x431 status=0 aid=1)
[51383.081195] wlan0: associated
[51383.081257] wlan0: Wrong control channel in association response: configured center-freq: 2437 hti-cfreq: 2412  hti->control_chan: 1 band: 0.  Disabling HT.
[51396.608657] wlan0: no IPv6 routers present
[51408.263837] wlan0: direct probe to 00:24:6c:ab:8f:a0 (try 1/3)
[51408.270120] wlan0: direct probe responded
[51408.274812] wlan0: authenticate with 00:24:6c:ab:8f:a0 (try 1)
[51408.282963] wlan0: authenticated
[51408.325536] wlan0: associate with 00:24:6c:ab:8f:a0 (try 1)
[51408.329786] wlan0: RX ReassocResp from 00:24:6c:ab:8f:a0 (capab=0x431 status=0 aid=2)
[51408.329791] wlan0: associated
[51408.329854] wlan0: Wrong control channel in association response: configured center-freq: 2412 hti-cfreq: 2462  hti->control_chan: 11 band: 0.  Disabling HT.

**austinap** · April 28th, 2012

OH MY GOD WHAT A STUPID PROBLEM!

I had always had Mobloquer running, and somehow during the upgrade the list got updated to include my school. Turned mobloquer off, it works like a charm...

Thanks again for all of your help, I really appreciate it.

**Fekry** · May 6th, 2012

I have the same problem after upgraded from 11.10 to 12.04

But what is mobloquer to check it or any similar thing

**alexpage** · May 9th, 2012

I am in a possibly similar, and unresolved situation. My university uses WPA2 Enterprise with TTLS/PAP. The connection works fine in Ubuntu 10.04 and 11.10. In 12.04, though, network manager just keeps prompting for my password. (The connection never completes.) I have an Atheros AR9287. Open networks and regular WPA networks work fine. I'm going to try connecting with a USB wifi dongle later today to see if it's something with ath9k.