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there was windows 8 before on my laptop and the wifi was working without a trouble. After I ve installed Ubuntu 14.04 the wifi connection is not visible (there is the icon available on the upper panel, but no wireless option visible).

Thank you in advance for help. MB

Martina
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2 Answers2

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First you need to check the output of ifconfig -a and see how many interfaces are listed. Do you have anything for "eth0"?

if not, then do sudo vi /etc/network/interface place the following lines (make sure to change the IP address according to Your Network Range at home as your router may broadcast 172.2.0.0 network or something else.)

auto lo
iface lo inet loopback
# Primary Network
iface eth0 inet static
address 192.168.2.13   #this ip might be different according to your router
netmask 255.255.255.0
gateway 192.168.2.1    
network 192.168.2.0

Now do

sudo /etc/init.d/networking/restart

You may have to restart the PC. I hope this helps. Please enter the result whatever you get after doing all this.

heavyguidence
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  • hello, I ve made the steps (the outcome is in one of the answers above), but after putting auto lo iface lo inet loopback

    Primary Network

    iface eth0 inet static (with address, netmask, gateway and network addapted to my network) - than nothing really happends - even after the restart. Just after the Ubuntu is turning on there sppears something about B43

     – Martina Jan 07 '15 at 18:07
  • try sudo ifconfig eth0 down and sudo ifconfig eth0 up. then ifconfig. check if eth0 is available their. you may have to try sudo servivce networking restart or the command mentioned in reply. – heavyguidence Jan 07 '15 at 19:32
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ifconfig -a eth0

Link encap:Ethernet HWaddr 00:1e:68:87:3e:9e 

      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:127.0.0.1  Mask:255.0.0.0 
      inet6 addr: ::1/128 Scope:Host 
      UP LOOPBACK RUNNING  MTU:65536  Metric:1 
      RX packets:241 errors:0 dropped:0 overruns:0 frame:0 
      TX packets:241 errors:0 dropped:0 overruns:0 carrier:0 
      collisions:0 txqueuelen:0 
      RX bytes:18033 (18.0 KB)  TX bytes:18033 (18.0 KB)
Martina
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