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Thread: Having problems with internet

  1. #1
    Join Date
    Jun 2008
    Beans
    16

    Having problems with internet

    I am currently having two problems. 1. Whenever I unplug or plug in the ethernet cable, linux crashes. In windows, it just displays a windows that a cable has been removed. Can I not do this in linux? 2. I cannot connect to my wireless network. I believe my wireless card is on and working based on the output of my terminal from the command iwconfig(posted below), but I cannot seem to to find my wireless network. Help?
    lo no wireless extensions.

    eth0 no wireless extensions.

    wmaster0 no wireless extensions.

    wlan0 IEEE 802.11g ESSID:""
    Mode:Managed Frequency:2.412 GHz Access Point: Not-Associated
    Tx-Power=27 dBm
    Retry min limit:7 RTS thr: off Fragment thr=2346 B
    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

  2. #2
    Join Date
    Jan 2008
    Location
    Melbourne, Australia.
    Beans
    Hidden!
    Distro
    Ubuntu

    Re: Having problems with internet

    Does your wireless network have a hidden ESSID?

    It looks to me like the wireless card can see the network but all information about it is hidden.

  3. #3
    Join Date
    Jun 2008
    Beans
    16

    Re: Having problems with internet

    I don't believe so, as this laptop was able to detect it when it was windows.

  4. #4
    Join Date
    Jan 2008
    Location
    Melbourne, Australia.
    Beans
    Hidden!
    Distro
    Ubuntu

    Re: Having problems with internet

    try this
    Code:
    sudo iwlist scan

  5. #5
    Join Date
    Jun 2008
    Beans
    16

    Re: Having problems with internet

    lo Interface doesn't support scanning.

    eth0 Interface doesn't support scanning.

    wmaster0 Interface doesn't support scanning.

    wlan0 No scan results
    Does this mean that no wireless networks are in the area? Thats weird, because when I hold my DS 3 feet away, it detects 7 networks.

  6. #6
    Join Date
    May 2006
    Location
    United Kingdom
    Beans
    469
    Distro
    Ubuntu 11.04 Natty Narwhal

    Re: Having problems with internet

    Sounds like two different problems.

    You should be able to unplug/plug the ethernet cable without any crashes, but what messages or info could you provide about the crashes.

    The wireless problem is a different kettle of fish. Have you hidden the SSID of your network on your Access Point/Router? Has it ever worked and what device/chipset are you using as well as distribution of Ubuntu?

    You may have to install the wireless device otherwise.

  7. #7
    Join Date
    Jun 2008
    Beans
    16

    Re: Having problems with internet

    1. When I unplug the ethernet, the whole system just locks up and I have to do a hard shut down and restart. But it has crashed like 3 times this morning (3 times in about 2-3 hours, and I have only disconnected the ethernet once, so I was probably wrong about the source of the crashes, sorry)

    2. I do not believe that I have hidden it. I can't seem to find the visibility setting on the router configuration program, but my DS did just detect it so I figure it is not hidden.

    3. I installed linux (any kind) for the first time on this laptop yesterday, and the wireless hasn't worked since then. But, when I go to the hardware drivers section, it says that the Broadcom b43 wireless driver is enabled and in use.

  8. #8
    Join Date
    Jan 2007
    Location
    London, UK
    Beans
    3,525
    Distro
    Ubuntu Development Release

    Re: Having problems with internet

    Can you post output of the following:

    Code:
    lshw -C network
    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.

  9. #9
    Join Date
    Jun 2008
    Beans
    16

    Re: Having problems with internet

    *-network
    description: Ethernet interface
    product: 88E8036 PCI-E Fast Ethernet Controller
    vendor: Marvell Technology Group Ltd.
    physical id: 0
    bus info: pci@0000:02:00.0
    logical name: eth0
    version: 10
    serial: 00:03:25:28:78:14
    width: 64 bits
    clock: 33MHz
    capabilities: bus_master cap_list ethernet physical
    configuration: broadcast=yes driver=sky2 driverversion=1.20 firmware=N/A ip=192.168.0.195 latency=0 module=sky2 multicast=yes
    *-network
    description: Network controller
    product: BCM4318 [AirForce One 54g] 802.11g Wireless LAN Controller
    vendor: Broadcom Corporation
    physical id: 7
    bus info: pci@0000:03:07.0
    version: 02
    width: 32 bits
    clock: 33MHz
    capabilities: bus_master
    configuration: driver=b43-pci-bridge latency=64 module=ssb
    *-network
    description: Wireless interface
    physical id: 1
    logical name: wlan0
    serial: 00:14:a5:47:3b:54
    capabilities: ethernet physical wireless
    configuration: broadcast=yes multicast=yes wireless=IEEE 802.11g
    Thats the output.

  10. #10
    Join Date
    Aug 2006
    Location
    Yellowknife
    Beans
    878

    Re: Having problems with internet

    Sorry to keep throwing commands at you, but can you try

    Code:
    sudo ifconfig wlan0
    as well as

    Code:
    nm-tool
    are you using WEP or WPA on the network?

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