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Thread: Network manager doesn't detect wi-fi

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  1. #1
    Join Date
    Mar 2013
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    Network manager doesn't detect wi-fi

    Hi

    It's a long time i'm using Ubuntu, but still a beginner. So, after searching without results, now it's my first post in this Forum!

    I have an ASUS EEE 1001px with Ubuntu 12.04. I tried to update to 12.10 but everything crashes, so I re-installed 12.04: now Network manager doesn't detect any Wi-fi. I'm sure that there is a Wi-fi, and I'm sure it's not a problem with Wi-fi button (in my computer FN+F2). Indeed there's something strange: before, when I type FN+F2 I activate the Wi-fi Network in Network manager (I mean I check or uncheck the second option of the network manager applet). Now nothing happens.


    I installed the Broadcom STA drivers: "This package contains Broadcom 802.11 Linux STA wireless driver for use with Broadcom's BCM4311-, BCM4312-, BCM4313-, BCM4321-, BCM4322-, BCM43224-, and BCM43225-, BCM43227- and BCM43228-based hardware".


    And I can show you the results of some commands (i put in blue what i type) I saw frequently in other posts: I hope this will be usefull.



    Thank you in advance!



    Code:
    victor@perceval:~$ lshw -C network
    WARNING: you should run this program as super-user.
      *-network DISABLED      
           description: Wireless interface
           product: AR2427 802.11bg Wireless Network Adapter (PCI-Express)
           vendor: Atheros Communications Inc.
           physical id: 0
           bus info: pci@0000:02:00.0
           logical name: wlan0
           version: 01
           serial: 48:5d:60:25:49:08
           width: 64 bits
           clock: 33MHz
           capabilities: bus_master cap_list ethernet physical wireless
           configuration: broadcast=yes driver=ath9k driverversion=3.5.0-25-generic firmware=N/A latency=0 multicast=yes wireless=IEEE 802.11bg
           resources: irq:17 memory:fbff0000-fbffffff
      *-network
           description: Ethernet interface
           product: AR8132 Fast Ethernet
           vendor: Atheros Communications Inc.
           physical id: 0
           bus info: pci@0000:01:00.0
           logical name: eth0
           version: c0
           serial: 20:cf:30:7f:2f:70
           size: 100Mbit/s
           capacity: 100Mbit/s
           width: 64 bits
           clock: 33MHz
           capabilities: bus_master cap_list ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd autonegotiation
           configuration: autonegotiation=on broadcast=yes driver=atl1c driverversion=1.0.1.0-NAPI duplex=full ip=8.13.2.11 latency=0 multicast=yes port=twisted pair speed=100Mbit/s
           resources: irq:46 memory:f7fc0000-f7ffffff ioport:ec00(size=128)
    WARNING: output may be incomplete or inaccurate, you should run this program as super-user.
    victor@perceval:~$ ifconfig
    eth0      Link encap:Ethernet  HWaddr 20:cf:30:7f:2f:70  
              inet addr:8.13.2.11  Bcast:8.13.3.255  Mask:255.255.252.0
              inet6 addr: fec0::b:553c:6d69:e69f:b862/64 Scope:Site
              inet6 addr: 2002:80d:24a:b:553c:6d69:e69f:b862/64 Scope:Global
              inet6 addr: fec0::b:22cf:30ff:fe7f:2f70/64 Scope:Site
              inet6 addr: 2002:80d:24a:b:22cf:30ff:fe7f:2f70/64 Scope:Global
              inet6 addr: fe80::22cf:30ff:fe7f:2f70/64 Scope:Link
              UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
              RX packets:642148 errors:0 dropped:0 overruns:0 frame:0
              TX packets:247142 errors:0 dropped:0 overruns:0 carrier:1
              collisions:0 txqueuelen:1000 
              RX bytes:879755824 (879.7 MB)  TX bytes:27070321 (27.0 MB)
    
    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:3542 errors:0 dropped:0 overruns:0 frame:0
              TX packets:3542 errors:0 dropped:0 overruns:0 carrier:0
              collisions:0 txqueuelen:0 
              RX bytes:347886 (347.8 KB)  TX bytes:347886 (347.8 KB)
    
    victor@perceval:~$ lspci
    00:00.0 Host bridge: Intel Corporation N10 Family DMI Bridge
    00:02.0 VGA compatible controller: Intel Corporation N10 Family Integrated Graphics Controller
    00:02.1 Display controller: Intel Corporation N10 Family Integrated Graphics Controller
    00:1b.0 Audio device: Intel Corporation N10/ICH 7 Family High Definition Audio Controller (rev 02)
    00:1c.0 PCI bridge: Intel Corporation N10/ICH 7 Family PCI Express Port 1 (rev 02)
    00:1c.1 PCI bridge: Intel Corporation N10/ICH 7 Family PCI Express Port 2 (rev 02)
    00:1c.3 PCI bridge: Intel Corporation N10/ICH 7 Family PCI Express Port 4 (rev 02)
    00:1d.0 USB controller: Intel Corporation N10/ICH 7 Family USB UHCI Controller #1 (rev 02)
    00:1d.1 USB controller: Intel Corporation N10/ICH 7 Family USB UHCI Controller #2 (rev 02)
    00:1d.2 USB controller: Intel Corporation N10/ICH 7 Family USB UHCI Controller #3 (rev 02)
    00:1d.3 USB controller: Intel Corporation N10/ICH 7 Family USB UHCI Controller #4 (rev 02)
    00:1d.7 USB controller: Intel Corporation N10/ICH 7 Family USB2 EHCI Controller (rev 02)
    00:1e.0 PCI bridge: Intel Corporation 82801 Mobile PCI Bridge (rev e2)
    00:1f.0 ISA bridge: Intel Corporation NM10 Family LPC Controller (rev 02)
    00:1f.2 SATA controller: Intel Corporation N10/ICH7 Family SATA Controller [AHCI mode] (rev 02)
    00:1f.3 SMBus: Intel Corporation N10/ICH 7 Family SMBus Controller (rev 02)
    01:00.0 Ethernet controller: Atheros Communications Inc. AR8132 Fast Ethernet (rev c0)
    02:00.0 Network controller: Atheros Communications Inc. AR2427 802.11bg Wireless Network Adapter (PCI-Express) (rev 01)
    victor@perceval:~$ iwconfig wlano
    wlano     No such device
    
    victor@perceval:~$ iwlist scan
    wlan0     Failed to read scan data : Network is down
    
    lo        Interface doesn't support scanning.
    
    eth0      Interface doesn't support scanning.

  2. #2
    Join Date
    Nov 2010
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    Spain
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    Xubuntu

    Re: Network manager doesn't detect wi-fi

    Hello.
    I suppose you have tried, with no luck:
    Code:
    sudo ifconfig wlan0 up
    Have you read the following link and still doesn't work?
    https://help.ubuntu.com/community/WifiDocs/Driver/bcm43xx
    One vision, one purpose.

  3. #3
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    Apr 2012
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    Re: Network manager doesn't detect wi-fi

    Hi, you dont have a broadcom card, lets
    remove that driver and see if the athk9 driver
    that is for your card can be activated. please
    copy and paste the following commands into
    a termninal..ctrl/alt/t

    Code:
    sudo apt-get remove --purge bcmwl-kernel-source
    echo "options ath9k nohwcrypt=1" | sudo tee /etc/modprobe.d/ath9k.conf
     sudo modprobe -rfv ath9k 
    sudo modprobe -v ath9k
    thanks
    Last edited by Hadaka; March 2nd, 2013 at 03:47 AM. Reason: typo
    Craving anchovy, herring and squid pizza.....with clam sauce

  4. #4
    Join Date
    Mar 2013
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    Re: Network manager doesn't detect wi-fi

    HI
    Thank you for your answers and your help:

    EL TITO: Yes I tried here the answers:
    Code:
    victor@perceval:~$ sudo ifconfig wlan0 up
    victor@perceval:~$ lshw -C network
    WARNING: you should run this program as super-user.
      *-network               
           description: Wireless interface
           product: AR2427 802.11bg Wireless Network Adapter (PCI-Express)
           vendor: Atheros Communications Inc.
           physical id: 0
           bus info: pci@0000:02:00.0
           logical name: wlan0
           version: 01
           serial: 48:5d:60:25:49:08
           width: 64 bits
           clock: 33MHz
           capabilities: bus_master cap_list ethernet physical wireless
           configuration: broadcast=yes driver=ath9k driverversion=3.5.0-25-generic firmware=N/A latency=0 multicast=yes wireless=IEEE 802.11bg
           resources: irq:17 memory:fbff0000-fbffffff
      *-network
           description: Ethernet interface
           product: AR8132 Fast Ethernet
           vendor: Atheros Communications Inc.
           physical id: 0
           bus info: pci@0000:01:00.0
           logical name: eth0
           version: c0
           serial: 20:cf:30:7f:2f:70
           size: 100Mbit/s
           capacity: 100Mbit/s
           width: 64 bits
           clock: 33MHz
           capabilities: bus_master cap_list ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd autonegotiation
           configuration: autonegotiation=on broadcast=yes driver=atl1c driverversion=1.0.1.0-NAPI duplex=full ip=8.13.2.11 latency=0 multicast=yes port=twisted pair speed=100Mbit/s
           resources: irq:46 memory:f7fc0000-f7ffffff ioport:ec00(size=128)
    WARNING: output may be incomplete or inaccurate, you should run this program as super-user.
    HADAKA:
    This is the result: I wrote your commands, and after this rebooted for see if there's any diference. I think that's the reason for the purge "error". Now in the applet apperas the wired connection and the wifi but in the second it says "the device is not managed" Any idea?
    Code:
    victor@perceval:~$ sudo apt-get remove --purge bcmwl-kernel-source
    [sudo] password for victor: 
    E: No s'ha pogut blocar /var/lib/dpkg/lock - open (11: El recurs no es troba disponible temporalment)
    E: No s'ha pogut bloquejar el directori d'administració (/var/lib/dpkg/), hi ha cap altre procés utilitzant-lo?
    victor@perceval:~$ echo "options ath9k nohwcrypt=1" | sudo tee /etc/modprobe.d/ath9k.conf
    options ath9k nohwcrypt=1
    victor@perceval:~$ sudo modprobe -rfv ath9k
    rmmod /lib/modules/3.5.0-25-generic/kernel/drivers/net/wireless/ath/ath9k/ath9k.ko
    rmmod /lib/modules/3.5.0-25-generic/kernel/net/mac80211/mac80211.ko
    rmmod /lib/modules/3.5.0-25-generic/kernel/drivers/net/wireless/ath/ath9k/ath9k_common.ko
    rmmod /lib/modules/3.5.0-25-generic/kernel/drivers/net/wireless/ath/ath9k/ath9k_hw.ko
    rmmod /lib/modules/3.5.0-25-generic/kernel/drivers/net/wireless/ath/ath.ko
    rmmod /lib/modules/3.5.0-25-generic/kernel/net/wireless/cfg80211.ko
    victor@perceval:~$ sudo modprobe -v ath9k
    insmod /lib/modules/3.5.0-25-generic/kernel/net/wireless/cfg80211.ko 
    insmod /lib/modules/3.5.0-25-generic/kernel/drivers/net/wireless/ath/ath.ko 
    insmod /lib/modules/3.5.0-25-generic/kernel/drivers/net/wireless/ath/ath9k/ath9k_hw.ko 
    insmod /lib/modules/3.5.0-25-generic/kernel/drivers/net/wireless/ath/ath9k/ath9k_common.ko 
    insmod /lib/modules/3.5.0-25-generic/kernel/net/mac80211/mac80211.ko 
    insmod /lib/modules/3.5.0-25-generic/kernel/drivers/net/wireless/ath/ath9k/ath9k.ko nohwcrypt=1
    The problem is the driver, isn't?

  5. #5
    Join Date
    Apr 2012
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    Re: Network manager doesn't detect wi-fi

    Hi, please post the output of..

    Code:
    rfkill list all
    thanks
    Craving anchovy, herring and squid pizza.....with clam sauce

  6. #6
    Join Date
    Mar 2013
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    5

    Re: Network manager doesn't detect wi-fi

    Hi Hadaka;

    here is the output:
    Code:
    victor@perceval:~$ rfkill list all
    0: asus-wlan: Wireless LAN
        Soft blocked: no
        Hard blocked: no

  7. #7
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    Re: Network manager doesn't detect wi-fi

    Hi,please do..

    Code:
    sudo modprobe ath9k
    and post the output of..

    Code:
    cat /etc/network/interfaces
    thanks.
    Craving anchovy, herring and squid pizza.....with clam sauce

  8. #8
    Join Date
    Mar 2013
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    5

    Re: Network manager doesn't detect wi-fi

    Hi,
    here is the output:

    Code:
    victor@perceval:~$ sudo modprobe ath9k
    [sudo] password for victor: 
    victor@perceval:~$ cat /etc/network/interfaces
    auto lo br0
    iface lo inet loopback
     
    # wireless wlan0
    allow-hotplug wlan0
    iface wlan0 inet manual
     
    # eth0 connected to the ISP router
    allow-hotplug eth0
    iface eth1 inet manual
    Thanks!

  9. #9
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    Re: Network manager doesn't detect wi-fi

    Ah ha ! there is the problem !

    *If your computer is a stand alone unit, not a server
    and not part of a bridged network. Then changes need
    to be made to /etc/network/interfaces. it currently looks
    like this....
    Code:
    victor@perceval:~$ cat /etc/network/interfaces
     auto lo br0
     iface lo inet loopback
       # wireless wlan0 allow-hotplug wlan0 iface wlan0 inet manual 
      # eth0 connected to the ISP router allow-hotplug eth0 iface eth1 inet manual
    it should only look like this...for a stand alone computer

    Code:
    auto lo
    iface lo inet loopback
    so..again *if it is a single unit,stand alone please do this..
    Code:
    sudo gedit /etc/network/interfaces
    remove all the extra lines and make it look like the sample i sent you.
    2 lines only. proof read, save and close. then
    boot. your wireless should start working.
    Last edited by Hadaka; March 3rd, 2013 at 09:31 PM. Reason: spelling
    Craving anchovy, herring and squid pizza.....with clam sauce

  10. #10
    Join Date
    Mar 2013
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    Re: Network manager doesn't detect wi-fi

    Hadaka, thanks for your help,

    We have solved the problem, but just in part. I don't know why, every time I restart the computer I must write this (otherwise the wi-fi options doesn't appear in the applet).
    Code:
    echo "options ath9k nohwcrypt=1" | sudo tee /etc/modprobe.d/ath9k.conf
     sudo modprobe -rfv ath9k
      sudo modprobe -v ath9k
    Is there a option to automatize this?

    And maybe it's a different problem, but can I use my laptot as router for my smartphone? I used hostapd (before the big crash) and probably the problem was this (sorry for don't advice, I thought I refix all the things I changed!). I mean for using it I must change /etc/network/interfaces: must I find a solution without change this "file" or there's a way to change it without a wi-fi crash?

    Thank you so much!

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