Some days ago after partial upgrade and update my "Ubuntu 12.04 64bit" wireless disappeared.

I googled and tried several solutions such as:

1.BIOS Reset

2.Re-installing all packages related to wireless via Synaptic.

3.Re-installing bcmwl-kernel-source.

4.Running this command via terminal sudo rfkill unblock all.

But none have any effect. Now with rfkill list all I can see that:

soft block=0
hard block=0

In section Wireless LAN, so it is ok. In additional drivers section I see disabled Broadcom STA Wireless driver, and try enable it, but it gives error with long log in file /var/log/jockey.log

Important fact: My hardware is OK as I have tried to use WiFi via LiveCD and it worked. So the problem is in my Ubuntu 12.04.

But what else can I do? Wireless option has just disappeared from network window. Fn+F3 doesn't do anything, the wireless light is always turned OFF.

When I write ifconfig in terminal, it doesn't show Wlan as it showed before. It gives this code:

$ ifconfig

bnep0     Link encap:Ethernet  HWaddr 90:00:4e:12:2a:24  
          inet addr:  Bcast:  Mask:
          inet6 addr: fe80::9200:4eff:fe12:2a24/64 Scope:Link
          RX packets:23059 errors:0 dropped:0 overruns:0 frame:0
          TX packets:20570 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:18550526 (18.5 MB)  TX bytes:3535892 (3.5 MB)

eth0      Link encap:Ethernet  HWaddr 88:ae:1d:63:30:2d  
          UP BROADCAST MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)

lo        Link encap:Local Loopback  
          inet addr:  Mask:
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:16436  Metric:1
          RX packets:12685 errors:0 dropped:0 overruns:0 frame:0
          TX packets:12685 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:982631 (982.6 KB)  TX bytes:982631 (982.6 KB)

iwconfig gives this:

bnep0     no wireless extensions.
eth0      no wireless extensions.
lo        no wireless extensions.
  • Post the output of lspci | grep -i wireless. – green Aug 21 '12 at 16:15
  • Hey green7. Its output is none. Nothing. – Elvin Haci Aug 21 '12 at 17:06

You can find everything about troubleshooting the wireless connections at this wiki page.

If nothing helps, reinstall Ubuntu.

  • Unfortunatelly nothing helps. I didn't want reinstall as it is long process. But it seems there is no other way. I think my problem is related with Linux Kernel. – Elvin Haci Aug 22 '12 at 5:32
  • 1
    In that case, I think it's better to reinstall than playing around with kernel versions, just to save time. – green Aug 22 '12 at 7:41

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