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wilbyforce 09-14-2009 08:30 AM

Networking suddenly stopped working
 
I've been using Ubuntu quite happily on my Fujitsu Siemens Lifebook laptop for months now. Today though, all networking failed. Wireless and Ethernet connections no longer work. If I boot into windoze, everything works. My Ubuntu desktop still works too.

Can anyone explain this? Might there have been a software update that my laptop didn't like? I'm at a loss how to resolve this with no working connection.

Any help most gratefully received.

Thanks.

camorri 09-14-2009 08:36 AM

Open a konsole, and run the command '/sbin/ifconfig' ( without the quotes ) and post the results. This will show the status of all your connections.

It would also help if you posted the result of 'netatat -r' This shows the routing information.

Can you connect to your router? From a web browser, type the ip address of your router in the address bar and see if it connects. Post the results.

wilbyforce 09-14-2009 08:47 AM

Well this is just too wierd! I've been fiddling about with this laptop for hours trying to get it to connect. I read your response so I booted back into Ubuntu and it connected wirelessly straight away!

I get the feeling this may be the start of something rather than the end.

Many thanks for the response :)

camorri 09-14-2009 08:53 AM

The commands I posted are the first places to look to determine status, so give them a try while things are working, and you will start to see the differences when things don't work.

tears 09-14-2009 09:52 AM

Quote:

Originally Posted by wilbyforce (Post 3682253)
Well this is just too wierd! I've been fiddling about with this laptop for hours trying to get it to connect. I read your response so I booted back into Ubuntu and it connected wirelessly straight away!

I get the feeling this may be the start of something rather than the end.

Many thanks for the response :)

dmesg is also your good friend.


------

Tears
http://www.techbabu.com

onebuck 09-14-2009 09:57 AM

Hi,

I would add that by using 'ifconfig -a' will show all devices even the ones that are down. :)

Quote:

excerpt from 'man ifconfig';

-a display all interfaces which are currently available, even if down

wilbyforce 09-14-2009 10:02 AM

Thanks all :)

wilbyforce 09-14-2009 10:10 AM

This is the output from /sbin/ifconfig with network working is as follows, does it look healthy?

Code:

eth0      Link encap:Ethernet  HWaddr 00:0b:5d:4a:0f:84 
          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)
          Interrupt:11 Base address:0x3000

eth1      Link encap:Ethernet  HWaddr 00:0e:35:1c:1b:a5 
          inet addr:192.168.1.88  Bcast:192.168.1.255  Mask:255.255.255.0
          inet6 addr: fe80::20e:35ff:fe1c:1ba5/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:1291 errors:1 dropped:1 overruns:0 frame:0
          TX packets:1402 errors:0 dropped:5 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:1207104 (1.2 MB)  TX bytes:316911 (316.9 KB)
          Interrupt:11 Base address:0x4000 Memory:d0205000-d0205fff

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:8 errors:0 dropped:0 overruns:0 frame:0
          TX packets:8 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:480 (480.0 B)  TX bytes:480 (480.0 B)



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