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Thread: Wireless Network Problem

  1. #1
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    Question Wireless Network Problem

    I've recently set up a Vista/Ubuntu Hardy Heron dual boot on my laptop. Wireless works fine with Vista but not on Ubuntu. I can see my home's wireless network in Ubuntu but can't connect to it. I'm able to enter my ISP password and IP address info in the Network section, but it still won't let me online. Any ideas on how to connect? Thanks

  2. #2
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    Re: Wireless Network Problem

    what do you get with iwconfig? What hardware are you using; lshw -C network?

  3. #3
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    Re: Wireless Network Problem

    Quote Originally Posted by cdtech View Post
    what do you get with iwconfig? What hardware are you using; lshw -C network?
    iwconfig:

    lo no wireless extensions.

    eth0 no wireless extensions.

    wmaster0 no wireless extensions.

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





    lshw -C network

    WARNING: you should run this program as super-user.
    PCI (sysfs)
    *-network
    description: Wireless interface
    product: PRO/Wireless 3945ABG Network Connection
    vendor: Intel Corporation
    physical id: 0
    bus info: pci@0000:02:00.0
    logical name: wmaster0
    version: 02
    serial: 00:1b:77:65:da:92
    width: 32 bits
    clock: 33MHz
    capabilities: bus_master cap_list logical ethernet physical wireless
    configuration: broadcast=yes driver=iwl3945 latency=0 module=iwl3945 multicast=yes wireless=IEEE 802.11g
    *-network
    description: Ethernet interface
    product: PRO/100 VE Network Connection
    vendor: Intel Corporation
    physical id: 8
    bus info: pci@0000:05:08.0
    logical name: eth0
    version: 02
    serial: 00:1b:24:5f:a9:2b
    width: 32 bits
    clock: 33MHz
    capabilities: bus_master cap_list ethernet physical
    configuration: broadcast=yes driver=e100 driverversion=3.5.23-k4-NAPI firmware=N/A latency=64 maxlatency=56 mingnt=8 module=e100 multicast=yes

  4. #4
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    Re: Wireless Network Problem

    sorry for the double post:
    i've just tried the ndiswrapper/ndisgtk method and have the vista drivers for my network card, but even this didnt seem to help

  5. #5
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    Re: Wireless Network Problem

    You shouldn't need ndiswrapper for your card; it has good native Linux drivers. So blacklist ndiswrapper for the time being:
    Code:
    sudo -s
    echo 'blacklist ndiswrapper' >> /etc/modprobe.d/blacklist
    exit
    Then reboot. Next, if feasible, can you try turning off WPA temporarily on your router and see if you can connect to the network unsecured? At least then we'll narrow the problem down.

    If you still can't connect even without encryption, post the output of:
    Code:
    iwlist wlan0 scan
    and I'll give you some commands to run in the terminal to see if you can get connected that way.

    Also some quick googling revealed this thread; it's old so I'm not sure if the stuff they mention there is still necessary, but you could try (it deals with the same kind of wireless card that you have).

  6. #6
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    Re: Wireless Network Problem

    ok thanks pytheas.
    i've already uninstalled ubuntu, but give me a little while to set it back up and i'll try what you said.
    thanks for that thread link btw. i'll try some of the methods in that one too

  7. #7
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    Re: Wireless Network Problem

    ok i've tried what you said pytheas, and even temporarily disabling wpa didn't work. Also i failed to mention before that the light for my wireless indicator is off on my laptop, and flipping the switch does nothing. I saw something similar in the thread you linked me to, and this may be part of the problem. So do you know how i can get it on? Anyway, here is the iwlist you asked me to post:

    wlan0 Scan completed :
    Cell 01 - Address: 00:12:0E:75: DF:9C
    ESSID:"WEST6013"
    Mode:Master
    Channel:6
    Frequency:2.437 GHz (Channel 6)
    Quality=62/100 Signal level=-70 dBm Noise level=-127 dBm
    Encryption key: on
    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; 24 Mb/s; 36 Mb/s
    48 Mb/s; 54 Mb/s
    Extra:tsf=0000022a284cd879

  8. #8
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    Re: Wireless Network Problem

    I've never had a card like you myself so I don't know exactly how to make sure it's on. But check the BIOS to make sure it's enabled (even if this wasn't necessary in Windows, it might be for Linux), and of course make sure any physical switches for the card are on. There are also instructions here for installing a better version of the driver that might solve the problem with the LED not coming in. I'd recommend giving them a try; they probably can't make it any worse.

    You could also try these commands to connect from the command line (with encryption on your router still disabled):
    Code:
    sudo -s
    ifconfig wlan0 down
    iwconfig wlan0 channel 6
    iwconfig wlan0 mode managed
    iwconfig wlan0 essid "WEST6013"
    ifconfig wlan0 up
    dhclient wlan0
    If things go the way you want, that last command will result in you being assigned an IP address (assuming your network uses dhcp; if it doesn't, let me know) and you'll be on the Internet.

    Let us know if this gets you anywhere.

  9. #9
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    Re: Wireless Network Problem

    had the same problem, installing b43-fwcutter and b43-firmware packages got my broadcom working - indicator on, networks listed...but i still couldn't connect.

  10. #10
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    Re: Wireless Network Problem

    had the same problem, installing b43-fwcutter and b43-firmware packages got my broadcom working - indicator on, networks listed...but i still couldn't connect.
    You should try blacklisting the b43 driver and reverting to bcm43xx, an older version of the Broadcom driver that works better for a lot of people. You would do this (copied and pasted from another thread):

    1. open a terminal and type:
    Code:
    sudo gedit /etc/modprobe.d/blacklist
    look for a line that says "blacklist bcm43xx." Delete this line and add the lines "blacklist b43", "blacklist b43legacy", "blacklist ssb" and "blacklist ndiswrapper"

    2. run:

    Code:
    sudo bcm43xx-fwcutter
    You should be asked to download firmware; tell it yes.

    Then reboot and see if the card works again.

    ----

    The original poster of this thread has an Intel wireless card, however, so Broadcom isn't the issue.

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