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Thread: 12.10 suddenly can't find my wifi?

  1. #1
    Join Date
    Jan 2011
    Beans
    10

    12.10 suddenly can't find my wifi?

    So, I have a dlink 655 whose network is suddenly not showing up in ubuntu? I have just returned from a week of travelling (during which I used plenty of wifi on ubuntu), and on returning home, both win 7 (same computer) and phone can see the network just fine, and ubuntu can see 5 other networks, but my own is gone? I have of course tried restarting the router, to no avail. Right now I'm on one of the other networks, which works fine (but is of course pretty unsatisfactory).

    I'm guessing some driver update in the past week (like a good boy I of course install all suggested updates) has messed something up? Any ideas for what to do?

    Btw., I tried reinstalling the generic headers through

    Code:
    sudo apt-get install linux-headers-generic
    sudo apt-get install --reinstall bcmwl-kernel-source
    since that solved the problems when my wireless card didn't work at all. However, that gave me:

    Code:
    Reading package lists... Done
    Building dependency tree       
    Reading state information... Done
    linux-headers-generic is already the newest version.
    The following packages were automatically installed and are no longer required:
      calligra-l10n-engb cdparanoia k3b k3b-data k3b-i18n kde-l10n-engb
      kde-l10n-zhcn language-pack-kde-en libflac++6 libk3b6 libkcddb4
    Use 'apt-get autoremove' to remove them.
    0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
    and

    Code:
    Reading package lists... Done
    Building dependency tree       
    Reading state information... Done
    The following packages were automatically installed and are no longer required:
      calligra-l10n-engb cdparanoia k3b k3b-data k3b-i18n kde-l10n-engb
      kde-l10n-zhcn language-pack-kde-en libflac++6 libk3b6 libkcddb4
    Use 'apt-get autoremove' to remove them.
    0 upgraded, 0 newly installed, 1 reinstalled, 0 to remove and 0 not upgraded.
    Need to get 0 B/1,181 kB of archives.
    After this operation, 0 B of additional disk space will be used.
    (Reading database ... 286183 files and directories currently installed.)
    Preparing to replace bcmwl-kernel-source 5.100.82.112+bdcom-0ubuntu3 (using .../bcmwl-kernel-source_5.100.82.112+bdcom-0ubuntu3_amd64.deb) ...
    Removing all DKMS Modules
    Done.
    Unpacking replacement bcmwl-kernel-source ...
    Setting up bcmwl-kernel-source (5.100.82.112+bdcom-0ubuntu3) ...
    Loading new bcmwl-5.100.82.112+bdcom DKMS files...
    Building only for 3.5.0-19-generic
    Building for architecture x86_64
    Building initial module for 3.5.0-19-generic
    Done.
    
    wl:
    Running module version sanity check.
     - Original module
       - No original module exists within this kernel
     - Installation
       - Installing to /lib/modules/3.5.0-19-generic/updates/dkms/
    
    depmod....
    
    DKMS: install completed.
    ERROR: Module b43 does not exist in /proc/modules
    ERROR: Module b43legacy does not exist in /proc/modules
    ERROR: Module ssb does not exist in /proc/modules
    ERROR: Module bcm43xx does not exist in /proc/modules
    ERROR: Module brcm80211 does not exist in /proc/modules
    ERROR: Module brcmfmac does not exist in /proc/modules
    ERROR: Module brcmsmac does not exist in /proc/modules
    ERROR: Module bcma does not exist in /proc/modules
    update-initramfs: deferring update (trigger activated)
    Processing triggers for initramfs-tools ...
    update-initramfs: Generating /boot/initrd.img-3.5.0-19-generic
    and that had no effect, neither after reinstalling. I must admit I don't know wat the last errors mean, but it seems I didn't break anything at least.

    Anyone has any ideas for how to find my wifi again?

  2. #2
    Join Date
    Jul 2008
    Location
    Bulgaria
    Beans
    275
    Distro
    Kubuntu 10.10 Maverick Meerkat

    Re: 12.10 suddenly can't find my wifi?

    Type this in the terminal and post the output. It will give us info on your wireless card
    Code:
     lshw -C network
    and also this

    Code:
     sudo iwlist scan
    this scans all your wireless networks in rage. ESSID tells you the actual name of the connection. See if yours pops up
    I killed hope,but you buried it....

  3. #3
    Join Date
    Jan 2011
    Beans
    10

    Re: 12.10 suddenly can't find my wifi?

    Sure. First bit:

    Code:
     lshw -C network
    WARNING: you should run this program as super-user.
      *-network               
           description: Ethernet interface
           product: NetLink BCM57785 Gigabit Ethernet PCIe
           vendor: Broadcom Corporation
           physical id: 0
           bus info: pci@0000:02:00.0
           logical name: eth0
           version: 10
           serial: b8:88:e3:09:5b:5f
           capacity: 1Gbit/s
           width: 64 bits
           clock: 33MHz
           capabilities: bus_master cap_list rom ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd 1000bt 1000bt-fd autonegotiation
           configuration: autonegotiation=on broadcast=yes driver=tg3 driverversion=3.123 firmware=sb latency=0 multicast=yes port=twisted pair
           resources: irq:16 memory:b3430000-b343ffff memory:b3440000-b344ffff memory:b3450000-b34507ff
      *-network
           description: Wireless interface
           product: BCM43228 802.11a/b/g/n
           vendor: Broadcom Corporation
           physical id: 0
           bus info: pci@0000:03:00.0
           logical name: eth1
           version: 00
           serial: 08:ed:b9:f2:6d:0d
           width: 64 bits
           clock: 33MHz
           capabilities: bus_master cap_list ethernet physical wireless
           configuration: broadcast=yes driver=wl0 driverversion=5.100.82.112 ip=192.168.87.104 latency=0 multicast=yes wireless=IEEE 802.11
           resources: irq:17 memory:b3500000-b3503fff
    WARNING: output may be incomplete or inaccurate, you should run this program as super-user.
    second bit shows 3 networks, none of which is the one I'm looking for.

  4. #4
    Join Date
    Jul 2008
    Location
    Bulgaria
    Beans
    275
    Distro
    Kubuntu 10.10 Maverick Meerkat

    Re: 12.10 suddenly can't find my wifi?

    Your card looks good to me. Weird,so you are saying that AT THIS MOMENT,windows and your phone (from what I saw in the first post) can see your own wireless network just fine,and ubuntu can't? This doesn't look like it's driver related or anything...
    I killed hope,but you buried it....

  5. #5
    Join Date
    Jan 2011
    Beans
    10

    Re: 12.10 suddenly can't find my wifi?

    indeed. Just switched back to win7, and behold: it's right here waiting for me.
    can this be something about channels or something that my ubuntu driver is studdenly not looking for?

  6. #6
    Join Date
    Jan 2013
    Beans
    1

    Re: 12.10 suddenly can't find my wifi?

    I had a similar problem. After reinstalled wifi driver and tried many other stuffs, I still could not solve this problem. Then I checked the wireless configuration on my wifi router, I found out that the region option has an impact on the channel counts. for example, there is up to 13 channels for ASIA region. that's what I choosed for my wireless network. And I set the channel to AUTO mode, i.e. the router will pick any channel automatically. in my case, the channel was 13. Unfortunately, I set the region to US in my laptop equipped with Ubuntu 12.10 system. Channel 13 is beyond its maximum channel number of 11.

    the solution is simple and straightforward:

    I just changed the region to US in my router, then I could find my wireless network without any problem.
    Last edited by stefanzhu; January 2nd, 2013 at 03:48 PM.

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