Network connection lost after upgrading to Kubuntu 7.10

[rbrown3rd]

Re: Network connection lost after upgrading to Kubuntu 7.10

Now I am at a point where I cannot connect with my Kubuntu boot at all. I would appreciate any help because I was just a happy user not a programmer until I upgraded to 7.10. Thanks.

[kc7gnm]

Re: Network connection lost after upgrading to Kubuntu 7.10

I had the same problems updating from 7.04 to 7.10. Had good eth0 before the upgrade but after the upgrade I had no connection at all. Luckily I only use Kubuntu as an APRS server so I didn't have much installed. I just did a fresh install and redid all the programs I had. Then I started having an update problem with adept updater wanting to not commit changes. I found a fix for that and now all is well. I just hope that the next upgrade goes smoothly. I will wait a while after it comes out and read here if folks are having problems before upgrading to the next version.

[rbrown3rd]

Re: Network connection lost after upgrading to Kubuntu 7.10

If I can get lucky and get a connection, which does happen sometimes, it is pretty stable. It is just getting that initial connect that is the problem.

[rbrown3rd]

Re: Network connection lost after upgrading to Kubuntu 7.10

This morning I booted into 7.10 and got a good connection. I did my routine tasks checking email etc. Spent an hour or so online and then shutdown. After coming back home I have robooted six times and still unable to get connected. Finally gave up and booted into Winxp which I am using at this time. I sure hope someone can solve this problem. It looks like a lot of other people are having it too. Anyone have any solutions or ideas?

[cmoman]

Re: Network connection lost after upgrading to Kubuntu 7.10

Can you post the contents of /etc/network/interfaces?

When you don't get a connection, what happens if you type

sudo dhclient3 eth0

Does that fix the connection? If it doesn't can you post the result?

[rbrown3rd]

Re: Network connection lost after upgrading to Kubuntu 7.10

Of course this time I connected on the first try so I did not get to try sudo dhclient3 eth0 but will do so next time I have a problem. So, here is the content of /etc/network/interfaces

auto lo
iface lo inet loopback
address 127.0.0.1
netmask 255.0.0.0

auto eth0
iface eth0 inet dhcp

auto eth1
iface eth1 inet dhcp

auto eth2
iface eth2 inet dhcp

auto wlan0
iface wlan0 inet dhcp

auto ath0
#iface ath0 inet dhcp

[cmoman]

Re: Network connection lost after upgrading to Kubuntu 7.10

If you are using KDE's KNetworkManager, I suggest you comment out all but the loopback interface
See below.

If KNetworkManager doesn't find a working connection for you then

sudo dhclient3 eth0

should get a connection assuming eth0 is the first ethernet card and has valid connection to your gateway/router and there is dhcp server somewhere on your network (usually within the gateway/router).

auto lo
iface lo inet loopback
address 127.0.0.1
netmask 255.0.0.0

#auto eth0
#iface eth0 inet dhcp

#auto eth1
#iface eth1 inet dhcp

#auto eth2
#iface eth2 inet dhcp

#auto wlan0
#iface wlan0 inet dhcp

#auto ath0
#iface ath0 inet dhcp

[rbrown3rd]

Re: Network connection lost after upgrading to Kubuntu 7.10

Thanks a lot. I'll give that a try tonight.

[rbrown3rd]

Re: Network connection lost after upgrading to Kubuntu 7.10 (solved)

Thanks to cmoman for helping me resolve this issue. The suggestion to comment out everything except for a few lines as in the following seems to have pretty much solved my problem. I still get a rare connection failure but it is considerablly improved. One problem we seemed to have found is that my hardware has two network cards installed. Here is the corrected /etc/network/interfaces file:

auto lo
iface lo inet loopback
address 127.0.0.1
netmask 255.0.0.0

#auto eth0
#iface eth0 inet dhcp

#auto eth1
#iface eth1 inet dhcp

#auto eth2
#iface eth2 inet dhcp

#auto wlan0
#iface wlan0 inet dhcp

#auto ath0
#iface ath0 inet dhcp

[rbrown3rd]

Re: Network connection lost after upgrading to Kubuntu 7.10

The problem has arisen again. Tonight I tried to connect five times with no success. Finally gave up and booted up WinXP. I went through all of the suggested procedures again with no sucess. One time I was connected briefly but the connection went stale. When I tried the sudo dhclient3 eth0 and/or eth1 I got a message about connection leases going stale or something along those lines. Any further advice anyone?

[rbrown3rd]

Re: Network connection lost after upgrading to Kubuntu 7.10

Opened my case and found an extra NIC on the board that I had forgotten about. I removed it thinking that would eliminate my iffy connections. It did not. Sometimes I connect with no problem and then I will have a whole series of no connects. The NIC that is in my machne now is configured as eth1. Any ideas?

[dibl]

Re: Network connection lost after upgrading to Kubuntu 7.10

Is there a BIOS selection for "onboard vs. add-on" ethernet? Maybe you can turn the onboard off, and put the card back in, or maybe you only need to turn on the onboard. :P

[rbrown3rd]

Re: Network connection lost after upgrading to Kubuntu 7.10

I'll take a look at the bios but I am beginning to think that all I have to do is post here using WinXP and then boot the Kubuntu partition. Seems every time I do that I get a connection. Just after posting and trying again I connected.