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Thread: No internet connection

  1. #1
    Join Date
    Sep 2009
    Beans
    7

    Angry No internet connection

    ...So I got attacked by viruses on my xp. I finally installed Ubuntu 9.04 on my Dell Inspiron 1501. However, now I am not being able to connect to the internet. The radio bars show a lil red cross on them. However, networking is enabled, wireless is enabled. Yesterday night the wireless adapter was turned on, now its not and I dont know how to turn it on either. I checked the firefox file menu and I have checked off the "work offline" option. Need help.

    Thanks a lot for any responses in advance.

  2. #2
    Join Date
    Dec 2006
    Beans
    1,482
    Distro
    Ubuntu Jaunty Jackalope (testing)

    Re: No internet connection

    First, are you sure you didn't accidentally hit the wifi switch on the laptop itself?

    Second, what kind of wifi card do you have, if you could open a terminal, run the following commands and post the output it would be helpful

    ifconfig
    iwconfig
    sudo lshw -C network
    lspci

    Just so you know, ifconfig gives network info, iwconfig gives wireless info, lshw gives hardware info, lspci gives pci bus info.
    Sharing Wifi Is Caring Wifi {o,o} Ubuntu Community Docs..
    |)__)
    -”-”-
    O RLY?

  3. #3
    Join Date
    Jan 2007
    Location
    London, UK
    Beans
    3,527
    Distro
    Ubuntu Development Release

    Re: No internet connection

    you need to turn your laptop wifi switch back on as other poster suggested.
    You came empty handed, that is how you shall leave. Whatever you claim as yours today, belonged to someone else yesterday, will be someone else's tomorrow.

  4. #4
    Join Date
    Jul 2009
    Beans
    571
    Distro
    Ubuntu 10.04 Lucid Lynx

    Re: No internet connection

    Here's how to restart your NetworkManager without rebooting your pc, might come handy...

    sudo /etc/init.d/NetworkManager restart
    It's OK, everything we know will become obsolete at some time.

  5. #5
    Join Date
    Sep 2009
    Beans
    7

    Re: No internet connection

    There you go...

    administrator@ubuntu:~$ lspci



    00:00.0 Host bridge: ATI Technologies Inc RS480 Host Bridge (rev 10)

    00:01.0 PCI bridge: ATI Technologies Inc RS480 PCI Bridge

    00:05.0 PCI bridge: ATI Technologies Inc RS480 PCI Bridge

    00:06.0 PCI bridge: ATI Technologies Inc RS480 PCI Bridge

    00:12.0 SATA controller: ATI Technologies Inc SB600 Non-Raid-5 SATA

    00:13.0 USB Controller: ATI Technologies Inc SB600 USB (OHCI0)

    00:13.1 USB Controller: ATI Technologies Inc SB600 USB (OHCI1)

    00:13.2 USB Controller: ATI Technologies Inc SB600 USB (OHCI2)

    00:13.3 USB Controller: ATI Technologies Inc SB600 USB (OHCI3)

    00:13.4 USB Controller: ATI Technologies Inc SB600 USB (OHCI4)

    00:13.5 USB Controller: ATI Technologies Inc SB600 USB Controller (EHCI)

    00:14.0 SMBus: ATI Technologies Inc SBx00 SMBus Controller (rev 13)

    00:14.1 IDE interface: ATI Technologies Inc SB600 IDE

    00:14.2 Audio device: ATI Technologies Inc SBx00 Azalia (Intel HDA)

    00:14.3 ISA bridge: ATI Technologies Inc SB600 PCI to LPC Bridge

    00:14.4 PCI bridge: ATI Technologies Inc SBx00 PCI to PCI Bridge

    00:18.0 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] HyperTransport Technology Configuration
    00:18.1 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] Address Map

    00:18.2 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] DRAM Controller

    00:18.3 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] Miscellaneous Control

    01:05.0 VGA compatible controller: ATI Technologies Inc RS482 [Radeon Xpress 200M]

    05:00.0 Network controller: Broadcom Corporation BCM4311 802.11b/g WLAN (rev 01)

    08:00.0 Ethernet controller: Broadcom Corporation BCM4401-B0 100Base-TX (rev 02)

    08:01.0 SD Host controller: Ricoh Co Ltd R5C822 SD/SDIO/MMC/MS/MSPro Host Adapter (rev 19)

    08:01.1 System peripheral: Ricoh Co Ltd R5C843 MMC Host Controller (rev 01)
    administrator@ubuntu:~$ ifconfig -a


    eth0 Link encap:Ethernet HWaddr 00:19:b9:57:1e:de

    UP BROADCAST RUNNING 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:21



    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:36 errors:0 dropped:0 overruns:0 frame:0

    TX packets:36 errors:0 dropped:0 overruns:0 carrier:0

    collisions:0 txqueuelen:0

    RX bytes:2688 (2.6 KB) TX bytes:2688 (2.6 KB)



    pan0 Link encap:Ethernet HWaddr 0a:92:ef:a7:e0:11

    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:0
    RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)



    wlan0 Link encap:Ethernet HWaddr 00:19:7d:8c:9e:63

    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)



    wmaster0 Link encap:UNSPEC HWaddr 00-19-7D-8C-9E-63-00-00-00-00-00-00-00-00-00-00

    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)




    administrator@ubuntu:~$ iwconfig


    lo no wireless extensions.



    eth0 no wireless extensions.



    wmaster0 no wireless extensions.



    wlan0 IEEE 802.11bg ESSID:""

    Mode:Managed Frequency:2.412 GHz Access Point: Not-Associated

    Tx-Power=20 dBm

    Retry min limit:7 RTS thrff Fragment thr=2352 B

    Power Managementff

    Link Quality:0 Signal level:0 Noise level:0

    Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0

    Tx excessive retries:0 Invalid misc:0 Missed beacon:0



    pan0 no wireless extensions.




    administrator@ubuntu:~$ lshw -c network


    WARNING: you should run this program as super-user.

    *-network
    description: Network controller

    product: BCM4311 802.11b/g WLAN

    vendor: Broadcom Corporation

    physical id: 0

    bus info: pci@0000:05:00.0

    version: 01

    width: 32 bits

    clock: 33MHz

    capabilities: bus_master cap_list

    configuration: driver=b43-pci-bridge latency=0 module=ssb

    *-network

    description: Ethernet interface

    product: BCM4401-B0 100Base-TX

    vendor: Broadcom Corporation

    physical id: 0

    bus info: pci@0000:08:00.0

    logical name: eth0

    version: 02

    serial: 00:19:b9:57:1e:de

    width: 32 bits

    clock: 33MHz

    capabilities: bus_master cap_list ethernet physical

    configuration: broadcast=yes driver=b44 driverversion=2.0 latency=64 module=ssb multicast=yes

    *-network:0 DISABLED

    description: Wireless interface

    physical id: 1

    logical name: wlan0

    serial: 00:19:7d:8c:9e:63

    capabilities: ethernet physical wireless

    configuration: broadcast=yes multicast=yes wireless=IEEE 802.11bg

    *-network:1 DISABLED

    description: Ethernet interface

    physical id: 2

    logical name: pan0

    serial: 0a:92:ef:a7:e0:11

    capabilities: ethernet physical

    configuration: broadcast=yes driver=bridge driverversion=2.3 firmware=N/A multicast=yes

  6. #6
    Join Date
    Sep 2009
    Beans
    7

    Re: No internet connection

    @AlexanderDGreat:

    Where do I type in this??
    (Sorry, I am a first timer at anything other than windows)

  7. #7
    Join Date
    Sep 2009
    Beans
    7

    Re: No internet connection

    Ok, I turned on the wireless adapter from windows but still I cant access the net

  8. #8
    Join Date
    Jul 2009
    Beans
    571
    Distro
    Ubuntu 10.04 Lucid Lynx

    Re: No internet connection

    You type this in the Terminal.

    Go to Applications > Accessories > Terminal.

    You will use this a lot, it's also called CLI (command line interface). Don't get intimidated.

    user@computername:~$

    user = your username
    @
    computername: = your hostname/cpuname

    ~ = means you're in your home directory.

    $ = means you're using CLI as user NOT root, root is #.

    note: when you're just a user you always add "sudo" before every command that's critical, it just means, super user do...

    /etc/ = where most of your config files are located

    /etc/init.d/ = where most of running background services are located (d is for daemon), i dunno meaning of init

    NetworkManger = this is the gnome-network-manager program

    restart = restart...

    *** Hey man, not to discourage you, but if you wanna make your wifi work, you have to read, read, and read some more... There are a lot of frustrated wifi users in Ubuntu, I'm just warning you so you'll be prepared and know what you're dealing with. Do you have the time? Good luck. =)
    Last edited by AlexanderDGreat; September 10th, 2009 at 04:40 PM.
    It's OK, everything we know will become obsolete at some time.

  9. #9
    Join Date
    Sep 2009
    Beans
    7

    Re: No internet connection

    Thanks for the description. Yes I do have time and willingness to get thru Ubuntu. I see a lot of forums for internet connections on Ubuntu. BTW, I had to install the driver which I did from System>Admin>Hardware Drivers. Now its showing me diff. networks available, however, its not accepting the password to my wifi network.

  10. #10
    Join Date
    Jul 2009
    Beans
    571
    Distro
    Ubuntu 10.04 Lucid Lynx

    Re: No internet connection

    In my case, I've tried using different wifi's some will connect in 3 seconds, others in 20 seconds, others won't connect at all.

    Also, I do a little trick, I connect intermittently, when that blue thing is circling around in NetworkManager (connecting), I let it be for 10 seconds, then I click my network name again twice, then it connects!

    Sometimes, I disable it, enable it, click to my network name, wait 12 secs, click again 2-3x, then I'm online.

    However others, I tried different things, but won't plain connect, later I found out it's the router's fault.

    I'm not an expert on this, so forgive my lack of technical advices.
    It's OK, everything we know will become obsolete at some time.

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