strange ubuntu problem

hey guys,

I'm having a rather strange but annoying problem with my ubuntu machine. We recently had to change routers from an o2 one to an old router we had lying around. Well we managed to get it up and working and I was able to connect fine on ubuntu. Then one evening late at night I turned on my laptop and was unable to connect. I went to bed and by the morning my laptop connected again. When I got back from work in the afternoon I was also able to connect and was connected until I had to restart my laptop around 10pm, after which I was unable to connect again.

All other machines in the house are having no connection troubles and the only variable I seem to see is the time of day. This is somewhat frustrating as I have to keep my laptop on all afternoon and evening if I want to keep connected!

Any help would be much appreciated:)

Are you able to ping the other machines that are behind the router while you are having connectivity issues? Do you have a valid IP address at the time?

My guess is that you are having trouble getting a DHCP lease sometimes, and this is what is causing the connectivity issues.

If the problem is that you are not getting an IP address, try running "dhclient eth0" (where eth0 is your interface).

Quote:

Originally Posted by bithub

Are you able to ping the other machines that are behind the router while you are having connectivity issues? Do you have a valid IP address at the time?

My guess is that you are having trouble getting a DHCP lease sometimes, and this is what is causing the connectivity issues.

If the problem is that you are not getting an IP address, try running "dhclient eth0" (where eth0 is your interface).

Thanks for the reply :)

Forgive my ignorance but you might have to explain your solution in a more n00b friendly manner :P

Well it's the morning now, I'm about to head out to work, and my laptop connected straight away (created this thread using my iphone)

Quote:

Originally Posted by Stonehambey

Thanks for the reply :)
Forgive my ignorance but you might have to explain your solution in a more n00b friendly manner :P

Good luck with linux! ;)

Seriously, you don't say a thing about your connection method*, so this looks more like a story about something than a request for technical opinions and advice.

On a tangent, I have had this weird problem since I compiled the 2.6.28.7 kernel where I have to leave ping running in the background all the time in order to maintain my connection.

*I presume that ubuntu is automatic, so you mean "it just does not connect". If you want to troubleshoot this you will have to do a little reading and investigating of how that happens. It probably involves the commands ifconfig and dhclient.

Quote:

Forgive my ignorance but you might have to explain your solution in a more n00b friendly manner

The next time you can't connect, run "ifconfig" on the command line. You should see something like:

Code:

eth0 Link encap:Ethernet HWaddr 00:13:d4:7b:2a:b6 inet addr:10.221.212.156 Bcast:10.221.212.255 Mask:255.255.255.0 inet6 addr: fe80::213:d4ff:fe7b:2ab6/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:145386142 errors:0 dropped:0 overruns:22613 frame:0 TX packets:19957863 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:251024087 (239.3 MB) TX bytes:4290447913 (3.9 GB) Interrupt:17 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:905778324 errors:0 dropped:0 overruns:0 frame:0 TX packets:905778324 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:2700953286 (2.5 GB) TX bytes:2700953286 (2.5 GB)

See how there is an IP address listed for eth0? Check and see if your interface gets an IP address the next time you have connection issues.