Ubuntu – Wireless connected but no internet access

15.04internetnetworkingwireless

I'm using ubuntu 15.04 vivid, I'm connected to the wifi but when I open Firefox, it said "Server not found", I open Software Updater it said Failed to download, basically no internet access.
But I've used ubuntu 14 before and I could use the wifi normally without any error.
Also my Windows and my phones work without any error too.
I've clean reinstall several time and I have the same problem.

Here is some information about my situation:

My wifi device is: Huawei HG8045A

$ ifconfig -a

eth0      Link encap:Ethernet  HWaddr a4:ba:db:d7:88:90  
          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)

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:65536  Metric:1
          RX packets:8281 errors:0 dropped:0 overruns:0 frame:0
          TX packets:8281 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:563292 (563.2 KB)  TX bytes:563292 (563.2 KB)

wlan0     Link encap:Ethernet  HWaddr c4:46:19:0f:ee:bf  
          inet addr:192.168.100.9  Bcast:192.168.100.255  Mask:255.255.255.0
          inet6 addr: fe80::c646:19ff:fe0f:eebf/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:33059 errors:0 dropped:0 overruns:0 frame:0
          TX packets:25679 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:32258604 (32.2 MB)  TX bytes:2616017 (2.6 MB)

Second command:

$ route -n

Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
0.0.0.0         192.168.100.1   0.0.0.0         UG    1024   0        0 wlan0
169.254.0.0     0.0.0.0         255.255.0.0     U     1000   0        0 wlan0
192.168.100.0   0.0.0.0         255.255.255.0   U     0      0        0 wlan0
sf@SFLap:~$ ping -c3 91.189.94.12
PING 91.189.94.12 (91.189.94.12) 56(84) bytes of data.
64 bytes from 91.189.94.12: icmp_seq=1 ttl=53 time=423 ms
64 bytes from 91.189.94.12: icmp_seq=2 ttl=53 time=422 ms
64 bytes from 91.189.94.12: icmp_seq=3 ttl=53 time=421 ms

--- 91.189.94.12 ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2000ms
rtt min/avg/max/mdev = 421.879/422.802/423.965/0.868 ms

Third command:

$ ping -c3 ubuntuforums.org

ping: unknown host ubuntuforums.org

Result from a guy's script I found on internet:

########## wireless info START ##########

Report from: 27 Jul 2015 22:12 ICT +0700

Booted last: 28 Jul 2015 04:42 ICT +0700

Script from: 14 Jul 2015 17:04 UTC +0000

##### release ###########################

Distributor ID:    Ubuntu
Description:    Ubuntu 15.04
Release:    15.04
Codename:    vivid

##### kernel ############################

Linux 3.19.0-21-generic #21-Ubuntu SMP Sun Jun 14 18:31:11 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux

Parameters: ro, quiet, splash, vt.handoff=7

##### desktop ###########################

Ubuntu

##### lspci #############################

12:00.0 Network controller [0280]: Broadcom Corporation BCM4313 802.11bgn Wireless Network Adapter [14e4:4727] (rev 01)
    Subsystem: Dell Inspiron M5010 / XPS 8300 [1028:0010]
    Kernel driver in use: wl

13:00.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. RTL8101E/RTL8102E PCI Express Fast Ethernet controller [10ec:8136] (rev 02)
    Subsystem: Dell Device [1028:0447]
    Kernel driver in use: r8169

##### lsusb #############################

Bus 002 Device 014: ID 413c:8160 Dell Computer Corp. Wireless 365 Bluetooth
Bus 002 Device 011: ID 413c:8162 Dell Computer Corp. Integrated Touchpad [Synaptics]
Bus 002 Device 010: ID 413c:8161 Dell Computer Corp. Integrated Keyboard
Bus 002 Device 009: ID 0a5c:4500 Broadcom Corp. BCM2046B1 USB 2.0 Hub (part of BCM2046 Bluetooth)
Bus 002 Device 013: ID 0951:1665 Kingston Technology 
Bus 002 Device 002: ID 8087:0020 Intel Corp. Integrated Rate Matching Hub
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 004: ID 0c45:6461 Microdia 
Bus 001 Device 003: ID 2635:0601  
Bus 001 Device 002: ID 8087:0020 Intel Corp. Integrated Rate Matching Hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

##### PCMCIA card info ##################

##### rfkill ############################

0: phy0: Wireless LAN
    Soft blocked: no
    Hard blocked: no
1: brcmwl-0: Wireless LAN
    Soft blocked: no
    Hard blocked: no
4: hci0: Bluetooth
    Soft blocked: no
    Hard blocked: no

##### lsmod #############################

wl                   6369280  0 
dell_wmi               16384  0 
sparse_keymap          16384  1 dell_wmi
cfg80211              540672  1 wl
dell_laptop            16384  0 
dcdbas                 16384  1 dell_laptop
wmi                    20480  1 dell_wmi

##### interfaces ########################

auto lo
iface lo inet loopback

##### ifconfig ##########################

eth0      Link encap:Ethernet  HWaddr <MAC 'eth0' [IF]>  
          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)

wlan0     Link encap:Ethernet  HWaddr <MAC 'wlan0' [IF]>  
          inet addr:192.168.100.9  Bcast:192.168.100.255  Mask:255.255.255.0
          inet6 addr: fe80::<IP6 'wlan0' [IF]>/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:55703 errors:0 dropped:0 overruns:0 frame:18398
          TX packets:47028 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:60247797 (60.2 MB)  TX bytes:4920972 (4.9 MB)
          Interrupt:17 

##### iwconfig ##########################

eth0      no wireless extensions.

lo        no wireless extensions.

wlan0     IEEE 802.11abg  ESSID:"DinhMoc"  
          Mode:Managed  Frequency:2.462 GHz  Access Point: <MAC 'DinhMoc' [AC1]>   
          Retry short limit:7   RTS thr:off   Fragment thr:off
          Power Management:on


##### route #############################

Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
0.0.0.0         192.168.100.1   0.0.0.0         UG    1024   0        0 wlan0
169.254.0.0     0.0.0.0         255.255.0.0     U     1000   0        0 wlan0
192.168.100.0   0.0.0.0         255.255.255.0   U     0      0        0 wlan0

##### resolv.conf #######################

nameserver 8.8.8.8
nameserver 8.8.4.4
nameserver 127.0.1.1

##### network managers ##################

Installed:

    NetworkManager

Running:

root       662     1  0 21:43 ?        00:00:00 /usr/sbin/NetworkManager --no-daemon

##### NetworkManager info ###############

GENERAL.DEVICE:                         wlan0
GENERAL.TYPE:                           wifi
GENERAL.VENDOR:                         Broadcom Corporation
GENERAL.PRODUCT:                        BCM4313 802.11bgn Wireless Network Adapter (Inspiron M5010 / XPS 8300)
GENERAL.DRIVER:                         wl
GENERAL.DRIVER-VERSION:                 6.30.223.248 (r487574)
GENERAL.FIRMWARE-VERSION:               
GENERAL.HWADDR:                         <MAC 'wlan0' [IF]>
GENERAL.MTU:                            1500
GENERAL.STATE:                          100 (connected)
GENERAL.REASON:                         0 (No reason given)
GENERAL.UDI:                            /sys/devices/pci0000:00/0000:00:1c.1/0000:12:00.0/net/wlan0
GENERAL.IP-IFACE:                       wlan0
GENERAL.NM-MANAGED:                     yes
GENERAL.AUTOCONNECT:                    yes
GENERAL.FIRMWARE-MISSING:               no
GENERAL.CONNECTION:                     DinhMoc
GENERAL.CON-UUID:                       83386bbf-439a-4e3a-af79-1d490216c8cf
GENERAL.CON-PATH:                       /org/freedesktop/NetworkManager/ActiveConnection/3
CAPABILITIES.CARRIER-DETECT:            no
CAPABILITIES.SPEED:                     65 Mb/s
CONNECTIONS.AVAILABLE-CONNECTION-PATHS: /org/freedesktop/NetworkManager/Settings/{0}
CONNECTIONS.AVAILABLE-CONNECTIONS[1]:   83386bbf-439a-4e3a-af79-1d490216c8cf | DinhMoc
WIFI-PROPERTIES.WEP:                    yes
WIFI-PROPERTIES.WPA:                    yes
WIFI-PROPERTIES.WPA2:                   yes
WIFI-PROPERTIES.TKIP:                   yes
WIFI-PROPERTIES.CCMP:                   yes
WIFI-PROPERTIES.AP:                     no
WIFI-PROPERTIES.ADHOC:                  yes
IP4.ADDRESS[1]:                         ip = 192.168.100.9/24, gw = 192.168.100.1
IP4.ROUTE[1]:                           dst = 169.254.0.0/16, nh = 0.0.0.0, mt = 1000
IP4.DNS[1]:                             8.8.8.8
IP4.DNS[2]:                             8.8.4.4
DHCP4.OPTION[1]:                        requested_ntp_servers = 1
DHCP4.OPTION[2]:                        requested_domain_search = 1
DHCP4.OPTION[3]:                        requested_broadcast_address = 1
DHCP4.OPTION[4]:                        requested_domain_name = 1
DHCP4.OPTION[5]:                        requested_rfc3442_classless_static_routes = 1
DHCP4.OPTION[6]:                        requested_time_offset = 1
DHCP4.OPTION[7]:                        expiry = 1438268643
DHCP4.OPTION[8]:                        requested_wpad = 1
DHCP4.OPTION[9]:                        next_server = 0.0.0.0
DHCP4.OPTION[10]:                       requested_netbios_scope = 1
DHCP4.OPTION[11]:                       requested_interface_mtu = 1
DHCP4.OPTION[12]:                       requested_subnet_mask = 1
DHCP4.OPTION[13]:                       dhcp_lease_time = 259200
DHCP4.OPTION[14]:                       ip_address = 192.168.100.9
DHCP4.OPTION[15]:                       subnet_mask = 255.255.255.0
DHCP4.OPTION[16]:                       requested_static_routes = 1
DHCP4.OPTION[17]:                       routers = 192.168.100.1
DHCP4.OPTION[18]:                       broadcast_address = 192.168.100.255
DHCP4.OPTION[19]:                       domain_name_servers = 8.8.8.8 8.8.4.4
DHCP4.OPTION[20]:                       requested_domain_name_servers = 1
DHCP4.OPTION[21]:                       requested_netbios_name_servers = 1
DHCP4.OPTION[22]:                       requested_routers = 1
DHCP4.OPTION[23]:                       requested_ms_classless_static_routes = 1
DHCP4.OPTION[24]:                       dhcp_message_type = 5
DHCP4.OPTION[25]:                       requested_host_name = 1
DHCP4.OPTION[26]:                       network_number = 192.168.100.0
DHCP4.OPTION[27]:                       dhcp_server_identifier = 192.168.100.1
IP6.ADDRESS[1]:                         ip = fe80::<IP6 'wlan0' [IF]>/64, gw = fe80::1
IP6.DNS[1]:                             fe80::1
DHCP6.OPTION[1]:                        requested_dhcp6_domain_search = 1
DHCP6.OPTION[2]:                        dhcp6_name_servers = fe80::1
DHCP6.OPTION[3]:                        dhcp6_server_id = 0:1:0:1:c7:92:bc:95:8:e8:4f:2d:fe:10
DHCP6.OPTION[4]:                        requested_dhcp6_server_id = 1
DHCP6.OPTION[5]:                        requested_dhcp6_name_servers = 1
DHCP6.OPTION[6]:                        requested_dhcp6_client_id = 1
DHCP6.OPTION[7]:                        dhcp6_client_id = 0:4:53:f0:f9:49:84:c4:33:23:9c:3e:c1:69:6a:d2:6e:d2

GENERAL.DEVICE:                         eth0
GENERAL.TYPE:                           ethernet
GENERAL.VENDOR:                         Realtek Semiconductor Co., Ltd.
GENERAL.PRODUCT:                        RTL8101E/RTL8102E PCI Express Fast Ethernet controller
GENERAL.DRIVER:                         r8169
GENERAL.DRIVER-VERSION:                 2.3LK-NAPI
GENERAL.FIRMWARE-VERSION:               
GENERAL.HWADDR:                         <MAC 'eth0' [IF]>
GENERAL.MTU:                            1500
GENERAL.STATE:                          20 (unavailable)
GENERAL.REASON:                         2 (Device is now managed)
GENERAL.UDI:                            /sys/devices/pci0000:00/0000:00:1c.2/0000:13:00.0/net/eth0
GENERAL.IP-IFACE:                       
GENERAL.NM-MANAGED:                     yes
GENERAL.AUTOCONNECT:                    yes
GENERAL.FIRMWARE-MISSING:               no
GENERAL.CONNECTION:                     --
GENERAL.CON-UUID:                       --
GENERAL.CON-PATH:                       --
CAPABILITIES.CARRIER-DETECT:            yes
CAPABILITIES.SPEED:                     unknown
CONNECTIONS.AVAILABLE-CONNECTION-PATHS: 
WIRED-PROPERTIES.CARRIER:               off

SSID            BSSID              MODE   CHAN  FREQ      RATE       SIGNAL  BARS  SECURITY   ACTIVE  * 
Nothing         <MAC 'Nothing' [AC5]>  Infra  6     2437 MHz  54 Mbit/s  52      ▂▄__  WPA1       no        
Comtrend        <MAC 'Comtrend' [AC2]>  Infra  11    2462 MHz  54 Mbit/s  39      ▂▄__  WPA2       no        
Free            <MAC 'Free' [AN3]>  Infra  6     2437 MHz  54 Mbit/s  27      ▂___  WPA1 WPA2  no        
TP-LINK_883BA0  <MAC 'TP-LINK_883BA0' [AC4]>  Infra  1     2412 MHz  54 Mbit/s  27      ▂___  WPA1 WPA2  no        
LeChung         <MAC 'LeChung' [AC3]>  Infra  1     2412 MHz  54 Mbit/s  22      ▂___  WPA1       no        
DinhMoc         <MAC 'DinhMoc' [AC1]>  Infra  11    2462 MHz  54 Mbit/s  100     ▂▄▆█  WPA1 WPA2  yes     * 

##### NetworkManager.state ##############

[main]
NetworkingEnabled=true
WirelessEnabled=true
WWANEnabled=true
WimaxEnabled=true

##### NetworkManager.conf ###############

[main]
plugins=ifupdown,keyfile,ofono
dns=dnsmasq

[ifupdown]
managed=false

##### NetworkManager profiles ###########

[[/etc/NetworkManager/system-connections/DinhMoc]] (600 root)
[connection] id=DinhMoc | type=wifi
[wifi] ssid=DinhMoc | mac-address=<MAC 'wlan0' [IF]>
[ipv4] method=auto
[ipv6] method=auto

[[/etc/NetworkManager/system-connections/vananh]] (600 root)
[connection] id=vananh | type=wifi
[wifi] ssid=vananh | mac-address=<MAC 'wlan0' [IF]>
[ipv4] method=auto
[ipv6] method=auto

##### iw reg get ########################

Region: Asia/Ho_Chi_Minh (based on set time zone)

country GB: DFS-ETSI
    (2402 - 2482 @ 40), (N/A, 20), (N/A)
    (5170 - 5250 @ 40), (N/A, 20), (N/A)
    (5250 - 5330 @ 40), (N/A, 20), (0 ms), DFS
    (5490 - 5710 @ 40), (N/A, 27), (0 ms), DFS
    (57240 - 65880 @ 2160), (N/A, 40), (N/A), NO-OUTDOOR

##### iwlist channels ###################

eth0      no frequency information.

lo        no frequency information.

wlan0     32 channels in total; available frequencies :
          Channel 01 : 2.412 GHz
          Channel 02 : 2.417 GHz
          Channel 03 : 2.422 GHz
          Channel 04 : 2.427 GHz
          Channel 05 : 2.432 GHz
          Channel 06 : 2.437 GHz
          Channel 07 : 2.442 GHz
          Channel 08 : 2.447 GHz
          Channel 09 : 2.452 GHz
          Channel 10 : 2.457 GHz
          Channel 11 : 2.462 GHz
          Channel 12 : 2.467 GHz
          Channel 13 : 2.472 GHz
          Channel 36 : 5.18 GHz
          Channel 38 : 5.19 GHz
          Channel 40 : 5.2 GHz
          Channel 42 : 5.21 GHz
          Channel 44 : 5.22 GHz
          Channel 46 : 5.23 GHz
          Channel 48 : 5.24 GHz
          Channel 52 : 5.26 GHz
          Channel 56 : 5.28 GHz
          Channel 60 : 5.3 GHz
          Channel 64 : 5.32 GHz
          Channel 100 : 5.5 GHz
          Channel 104 : 5.52 GHz
          Channel 108 : 5.54 GHz
          Channel 112 : 5.56 GHz
          Channel 116 : 5.58 GHz
          Channel 120 : 5.6 GHz
          Channel 124 : 5.62 GHz
          Channel 128 : 5.64 GHz
          Current Frequency:2.462 GHz (Channel 11)

##### iwlist scan #######################

eth0      Interface doesn't support scanning.

lo        Interface doesn't support scanning.

Channel occupancy:

      2   APs on   Frequency:2.412 GHz (Channel 1)
      1   APs on   Frequency:2.437 GHz (Channel 6)
      2   APs on   Frequency:2.462 GHz (Channel 11)

wlan0     Scan completed :
          Cell 01 - Address: <MAC 'DinhMoc' [AC1]>
                    Channel:11
                    Frequency:2.462 GHz (Channel 11)
                    Quality=70/70  Signal level=-11 dBm  
                    Encryption key:on
                    ESSID:"DinhMoc"
                    Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 9 Mb/s
                              18 Mb/s; 36 Mb/s; 54 Mb/s
                    Bit Rates:6 Mb/s; 12 Mb/s; 24 Mb/s; 48 Mb/s
                    Mode:Master
                    Extra:tsf=0000000000000000
                    Extra: Last beacon: 4ms ago
                    IE: WPA Version 1
                        Group Cipher : TKIP
                        Pairwise Ciphers (2) : TKIP CCMP
                        Authentication Suites (1) : PSK
                    IE: IEEE 802.11i/WPA2 Version 1
                        Group Cipher : TKIP
                        Pairwise Ciphers (2) : TKIP CCMP
                        Authentication Suites (1) : PSK
          Cell 02 - Address: <MAC 'Comtrend' [AC2]>
                    Channel:11
                    Frequency:2.462 GHz (Channel 11)
                    Quality=21/70  Signal level=-89 dBm  
                    Encryption key:on
                    ESSID:"Comtrend"
                    Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 18 Mb/s
                              24 Mb/s; 36 Mb/s; 54 Mb/s
                    Bit Rates:6 Mb/s; 9 Mb/s; 12 Mb/s; 48 Mb/s
                    Mode:Master
                    Extra:tsf=0000000000000000
                    Extra: Last beacon: 4ms ago
                    IE: IEEE 802.11i/WPA2 Version 1
                        Group Cipher : CCMP
                        Pairwise Ciphers (1) : CCMP
                        Authentication Suites (1) : PSK
          Cell 03 - Address: <MAC 'LeChung' [AC3]>
                    Channel:1
                    Frequency:2.412 GHz (Channel 1)
                    Quality=24/70  Signal level=-86 dBm  
                    Encryption key:on
                    ESSID:"LeChung"
                    Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 18 Mb/s
                              24 Mb/s; 36 Mb/s; 54 Mb/s
                    Bit Rates:6 Mb/s; 9 Mb/s; 12 Mb/s; 48 Mb/s
                    Mode:Master
                    Extra:tsf=0000000000000000
                    Extra: Last beacon: 4ms ago
                    IE: WPA Version 1
                        Group Cipher : CCMP
                        Pairwise Ciphers (1) : CCMP
                        Authentication Suites (1) : PSK
          Cell 04 - Address: <MAC 'TP-LINK_883BA0' [AC4]>
                    Channel:1
                    Frequency:2.412 GHz (Channel 1)
                    Quality=24/70  Signal level=-86 dBm  
                    Encryption key:on
                    ESSID:"TP-LINK_883BA0"
                    Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 6 Mb/s
                              9 Mb/s; 12 Mb/s; 18 Mb/s
                    Bit Rates:24 Mb/s; 36 Mb/s; 48 Mb/s; 54 Mb/s
                    Mode:Master
                    Extra:tsf=0000000000000000
                    Extra: Last beacon: 4ms ago
                    IE: IEEE 802.11i/WPA2 Version 1
                        Group Cipher : CCMP
                        Pairwise Ciphers (1) : CCMP
                        Authentication Suites (1) : PSK
                    IE: WPA Version 1
                        Group Cipher : CCMP
                        Pairwise Ciphers (1) : CCMP
                        Authentication Suites (1) : PSK
          Cell 05 - Address: <MAC 'Nothing' [AC5]>
                    Channel:6
                    Frequency:2.437 GHz (Channel 6)
                    Quality=50/70  Signal level=-60 dBm  
                    Encryption key:on
                    ESSID:"Nothing"
                    Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 18 Mb/s
                              24 Mb/s; 36 Mb/s; 54 Mb/s
                    Bit Rates:6 Mb/s; 9 Mb/s; 12 Mb/s; 48 Mb/s
                    Mode:Master
                    Extra:tsf=0000000000000000
                    Extra: Last beacon: 4ms ago
                    IE: WPA Version 1
                        Group Cipher : CCMP
                        Pairwise Ciphers (1) : CCMP
                        Authentication Suites (1) : PSK

##### module infos ######################

[wl]
filename:       /lib/modules/3.19.0-21-generic/updates/dkms/wl.ko
license:        MIXED/Proprietary
srcversion:     9A49255BA90267D99664757
depends:        cfg80211
vermagic:       3.19.0-21-generic SMP mod_unload modversions 
parm:           passivemode:int
parm:           wl_txq_thresh:int
parm:           oneonly:int
parm:           piomode:int
parm:           instance_base:int
parm:           nompc:int
parm:           intf_name:string

[cfg80211]
filename:       /lib/modules/3.19.0-21-generic/kernel/net/wireless/cfg80211.ko
description:    wireless configuration support
license:        GPL
author:         Johannes Berg
srcversion:     E61EB836E1B33C2A2918485
depends:        
intree:         Y
vermagic:       3.19.0-21-generic SMP mod_unload modversions 
signer:         Magrathea: Glacier signing key
sig_key:        33:3A:84:CC:97:05:DD:B2:6E:1C:DC:E3:88:AF:CE:DC:2D:EF:F7:61
sig_hashalgo:   sha512
parm:           ieee80211_regdom:IEEE 802.11 regulatory domain code (charp)
parm:           cfg80211_disable_40mhz_24ghz:Disable 40MHz support in the 2.4GHz band (bool)

##### module parameters #################

[cfg80211]
cfg80211_disable_40mhz_24ghz: N
ieee80211_regdom: 00

##### /etc/modules ######################

##### modprobe options ##################

[/etc/modprobe.d/blacklist-ath_pci.conf]
blacklist ath_pci

[/etc/modprobe.d/blacklist-bcm43.conf]
blacklist b43
blacklist b43legacy
blacklist ssb
blacklist bcm43xx
blacklist brcm80211
blacklist brcmfmac
blacklist brcmsmac
blacklist bcma

[/etc/modprobe.d/blacklist.conf]
blacklist evbug
blacklist usbmouse
blacklist usbkbd
blacklist eepro100
blacklist de4x5
blacklist eth1394
blacklist snd_intel8x0m
blacklist snd_aw2
blacklist i2c_i801
blacklist prism54
blacklist bcm43xx
blacklist garmin_gps
blacklist asus_acpi
blacklist snd_pcsp
blacklist pcspkr
blacklist amd76x_edac

[/etc/modprobe.d/blacklist-rare-network.conf]
alias net-pf-3 off
alias net-pf-6 off
alias net-pf-9 off
alias net-pf-11 off
alias net-pf-12 off
alias net-pf-19 off
alias net-pf-21 off
alias net-pf-36 off

[/etc/modprobe.d/iwlwifi.conf]
remove iwlwifi \
(/sbin/lsmod | grep -o -e ^iwlmvm -e ^iwldvm -e ^iwlwifi | xargs /sbin/rmmod) \
&& /sbin/modprobe -r mac80211

[/etc/modprobe.d/mlx4.conf]
softdep mlx4_core post: mlx4_en

##### rc.local ##########################

exit 0

##### pm-utils ##########################

##### udev rules ########################

[/etc/udev/rules.d/70-persistent-net.rules]
# PCI device 0x10ec:0x8136 (r8169)
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="<MAC 'eth0' [IF]>", ATTR{dev_id}=="0x0", ATTR{type}=="1", KERNEL=="eth*", NAME="eth0"
# PCI device 0x14e4:0x4727 (brcmsmac)
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="<MAC 'wlan0' [IF]>", ATTR{dev_id}=="0x0", ATTR{type}=="1", KERNEL=="wlan*", NAME="wlan0"

##### dmesg #############################

[  991.453754] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
[  999.714122] CPU: 1 PID: 378 Comm: wl_event_handle Tainted: P           OE  3.19.0-21-generic #21-Ubuntu
[  999.714251]  [<ffffffffc08809fb>] wl_notify_roaming_status+0xcb/0x150 [wl]
[  999.714318]  [<ffffffffc087d75a>] wl_event_handler+0x6a/0x230 [wl]
[  999.714417]  [<ffffffffc087d6f0>] ? wl_free_wdev.isra.23+0x80/0x80 [wl]
[ 1535.378159] ERROR @wl_dev_intvar_get : error (-1)

########## wireless info END ############

I don't understand but sometime I refresh the page in firefox and it work but very short, about a minute and it said "server not found" again.

Best Answer

Well, I ask at ubuntu forums and they answer very fast and it worked.

Click on Network Manager> 
Click 'Edit' 
Edit the wireless connection>
Click the IPv6 tab>
Set IPv6 to ignore>
click OK>
Reboot.
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