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Thread: no wifi network visible

  1. #1
    Join Date
    Jun 2013
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    46

    no wifi network visible

    Hey guys, I think this is the most repeated issue but i have searched all such threads and no one of them have same problem as me
    So i was using a live usb on UBUNTU 13.04 64BIT on my laptop acer aspire 4752,BCM43227 , it worked well and the wifi was working very correctly , after 10-15 minutes the system froze/hanged only the arrow was moving and nothing else so i pressed the power button and shut down forcibly.

    Now the problem my wifi is enabled but it doesn't show any networks , before restarting it showed 12 networks , please help.
    I know some of you may argue that because maybe there are no networks,but i have checked using my desktop pc that there are 10 networks available with more than 50% strength


    please someone help me this post has got 64 views and no replies :'( , should i add something else that maybe of use..?
    Last edited by manngaurav; June 15th, 2013 at 03:53 PM.

  2. #2
    Join Date
    Aug 2011
    Location
    Berlin, Germany
    Beans
    7,046
    Distro
    Ubuntu Gnome 14.04 Trusty Tahr

    Re: no wifi network visible

    Hi,

    please open a terminal with CTRL+ALT+T and show the outputs of these commands:
    Code:
    lspci -nnk | grep -iA2 net
    lspci -nnk | grep -iA2 VGA
    iwconfig
    lsmod
    sudo iwlist scan
    Does LAN work?

  3. #3
    Join Date
    Jun 2013
    Beans
    46

    Re: no wifi network visible

    ubuntu@ubuntu:~$ lspci -nnk | grep -iA2 net
    02:00.0 Network controller [0280]: Broadcom Corporation BCM43227 802.11b/g/n [14e4:4358]
    Subsystem: Foxconn International, Inc. Device [105b:e040]
    Kernel driver in use: wl
    03:00.0 Ethernet controller [0200]: Broadcom Corporation NetLink BCM57785 Gigabit Ethernet PCIe [14e4:16b5] (rev 10)
    Subsystem: Acer Incorporated [ALI] Device [1025:0500]
    Kernel driver in use: tg3
    03:00.1 SD Host controller [0805]: Broadcom Corporation NetXtreme BCM57765 Memory Card Reader [14e4:16bc] (rev 10)
    Subsystem: Acer Incorporated [ALI] Device [1025:0500]
    Kernel driver in use: sdhci-pci

    ubuntu@ubuntu:~$ lspci -nnk | grep -iA2 VGA
    00:02.0 VGA compatible controller [0300]: Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller [8086:0116] (rev 09)
    Subsystem: Acer Incorporated [ALI] Device [1025:0506]
    Kernel driver in use: i915

    ubuntu@ubuntu:~$ iwconfig

    eth0 no wireless extensions.

    eth1 IEEE 802.11abg ESSIDff/any
    Mode:Managed Access Point: Not-Associated
    Retry long limit:7 RTS thrff Fragment thrff
    Power Managementff

    lo no wireless extensions.

    ubuntu@ubuntu:~$ lsmod

    Module Size Used by
    lib80211_crypt_tkip 17379 0
    wl 3074449 0
    lib80211 14352 2 wl,lib80211_crypt_tkip
    cfg80211 510937 1 wl
    dm_crypt 22820 0
    ath3k 12918 0
    btusb 22474 0
    snd_hda_codec_hdmi 36913 1
    snd_hda_codec_realtek 78399 1
    snd_hda_intel 39619 6
    snd_hda_codec 136453 3 snd_hda_codec_realtek,snd_hda_codec_hdmi,snd_hda_i ntel
    snd_hwdep 13602 1 snd_hda_codec
    snd_pcm 97451 3 snd_hda_codec_hdmi,snd_hda_codec,snd_hda_intel
    snd_page_alloc 18710 2 snd_pcm,snd_hda_intel
    snd_seq_midi 13324 0
    snd_seq_midi_event 14899 1 snd_seq_midi
    snd_rawmidi 30180 1 snd_seq_midi
    joydev 17377 0
    coretemp 13355 0
    uvcvideo 80847 0
    snd_seq 61554 2 snd_seq_midi_event,snd_seq_midi
    videobuf2_vmalloc 13056 1 uvcvideo
    snd_seq_device 14497 3 snd_seq,snd_rawmidi,snd_seq_midi
    kvm_intel 132891 0
    snd_timer 29425 2 snd_pcm,snd_seq
    videobuf2_memops 13202 1 videobuf2_vmalloc
    videobuf2_core 40513 1 uvcvideo
    kvm 443165 1 kvm_intel
    acer_wmi 32467 0
    videodev 129260 2 uvcvideo,videobuf2_core
    psmouse 95870 0
    parport_pc 28152 0
    sparse_keymap 13890 1 acer_wmi
    ghash_clmulni_intel 13259 0
    cryptd 20373 1 ghash_clmulni_intel
    serio_raw 13215 0
    dm_multipath 22843 0
    mac_hid 13205 0
    ppdev 17073 0
    snd 68876 22 snd_hda_codec_realtek,snd_hwdep,snd_timer,snd_hda_ codec_hdmi,snd_pcm,snd_seq,snd_rawmidi,snd_hda_cod ec,snd_hda_intel,snd_seq_device
    bnep 18036 2
    lpc_ich 17061 0
    mei 41158 0
    lp 17759 0
    scsi_dh 14843 1 dm_multipath
    soundcore 12680 1 snd
    rfcomm 42641 12
    parport 46345 3 lp,ppdev,parport_pc
    microcode 22881 0
    bluetooth 228619 23 bnep,ath3k,btusb,rfcomm
    squashfs 36522 1
    overlayfs 28003 1
    nls_iso8859_1 12713 1
    dm_raid45 76725 0
    xor 17116 1 dm_raid45
    dm_mirror 21946 0
    dm_region_hash 20820 1 dm_mirror
    dm_log 18529 3 dm_region_hash,dm_mirror,dm_raid45
    usb_storage 57204 1
    wmi 19070 1 acer_wmi
    sdhci_pci 18590 0
    sdhci 32522 1 sdhci_pci
    i915 600351 3
    tg3 153796 0
    ptp 18621 1 tg3
    pps_core 14080 1 ptp
    ahci 25731 1
    libahci 31364 1 ahci
    video 19390 2 i915,acer_wmi
    i2c_algo_bit 13413 1 i915
    drm_kms_helper 49394 1 i915
    drm 286313 4 i915,drm_kms_helper

    ubuntu@ubuntu:~$ sudo iwlist scan
    eth0 Interface doesn't support scanning.

    eth1 Interface doesn't support scanning : Invalid argument

    lo Interface doesn't support scanning.


    YES LAN IS WORKING
    Last edited by manngaurav; June 16th, 2013 at 04:16 PM.

  4. #4
    Join Date
    Jun 2013
    Beans
    46

    Re: no wifi network visible

    I THINK the above output is hard to understand so , here is the link to (screenshots and ouptut as .pdf and .odt , i dont know how to make it more readable) https://drive.google.com/folderview?...U0&usp=sharing . Thank you very much for your help , please help me solve it thank you once again
    Last edited by manngaurav; June 16th, 2013 at 04:24 PM.

  5. #5
    Join Date
    Jul 2005
    Beans
    2,047

    Re: no wifi network visible

    ~
    Last edited by ahallubuntu; June 24th, 2013 at 01:34 AM.

  6. #6
    Join Date
    Apr 2012
    Beans
    Hidden!

    Re: no wifi network visible

    Hi, give this a try..
    copy and paste..
    Code:
     
    echo blacklist acer_wmi | sudo tee -a /etc/modprobe.d/blacklist.conf
    then do..
    Code:
    sudo modprobe -rfv wl
    sudo modprobe -v wl
    boot
    thanks.
    Last edited by Hadaka; June 16th, 2013 at 04:56 PM.
    Craving anchovy, herring and squid pizza.....with clam sauce

  7. #7
    Join Date
    Jun 2013
    Beans
    46

    Re: no wifi network visible

    @ahallubuntu i dont know why is that wl driver is showing up but here i think the driver is correctScreenshot from 2013-06-16 16:06:47.jpgScreenshot from 2013-06-15 13:06:01.jpg
    Last edited by manngaurav; June 16th, 2013 at 05:11 PM.

  8. #8
    Join Date
    Jun 2013
    Beans
    46

    Re: no wifi network visible

    @ahallubuntu this was the output of all those instruction i dont know if they were completed correctly or not please check , because i still dont have any networks


    ubuntu@ubuntu:~$ sudo apt-get --reinstall install bcmwl-kernel-source
    Reading package lists... Done
    Building dependency tree
    Reading state information... Done
    The following package was automatically installed and is no longer required:
    linux-image-generic
    Use 'apt-get autoremove' to remove it.
    0 upgraded, 0 newly installed, 1 reinstalled, 0 to remove and 104 not upgraded.
    Need to get 0 B/1,346 kB of archives.
    After this operation, 0 B of additional disk space will be used.
    (Reading database ... 162424 files and directories currently installed.)
    Preparing to replace bcmwl-kernel-source 6.20.155.1+bdcom-0ubuntu6 (using .../bcmwl-kernel-source_6.20.155.1+bdcom-0ubuntu6_amd64.deb) ...
    Removing all DKMS Modules
    Done.
    Unpacking replacement bcmwl-kernel-source ...
    Setting up bcmwl-kernel-source (6.20.155.1+bdcom-0ubuntu6) ...
    Loading new bcmwl-6.20.155.1+bdcom DKMS files...
    Building only for 3.8.0-19-generic
    Building for architecture x86_64
    Building initial module for 3.8.0-19-generic
    Done.


    wl:
    Running module version sanity check.
    - Original module
    - No original module exists within this kernel
    - Installation
    - Installing to /lib/modules/3.8.0-19-generic/updates/dkms/


    depmod....


    DKMS: install completed.
    update-initramfs is disabled since running on read-only media

    ubuntu@ubuntu:~$ sudo modprobe -r b43 ssb wl brcmfmac brcmsmac bcma
    ubuntu@ubuntu:~$ sudo modprobe wl

  9. #9
    Join Date
    Jun 2013
    Beans
    46

    Re: no wifi network visible

    Quote Originally Posted by Hadaka View Post
    Hi, give this a try..
    copy and paste..
    Code:
     
    echo blacklist acer_wmi | sudo tee -a /etc/modprobe.d/blacklist.conf
    then do..
    Code:
    sudo modprobe -rfv wl
    sudo modprobe -v wl
    boot
    thanks.
    here's the ouptut of you commands

    ubuntu@ubuntu:~$ echo blacklist acer_wmi | sudo tee -a /etc/modprobe.d/blacklist.conf
    blacklist acer_wmi
    ubuntu@ubuntu:~$ sudo modprobe -rfv wl
    rmmod wl
    rmmod cfg80211
    ubuntu@ubuntu:~$ sudo modprobe -v wl
    insmod /lib/modules/3.8.0-19-generic/kernel/net/wireless/cfg80211.ko
    insmod /lib/modules/3.8.0-19-generic/updates/dkms/wl.ko

    STILL UNSOLVED
    Last edited by manngaurav; June 17th, 2013 at 10:03 AM.

  10. #10
    Join Date
    Jun 2013
    Beans
    46

    Re: no wifi network visible

    i rebooted and nothing happens , perhaps because i am using live usb everything gets deleted on reboot..? after every time i restart i have to go to system>softwaresand apps>enable multiverse and then under additional drivers the broadcom sta driver then only i can get the enable wifi option in network manager

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