Weird wired internet issue; need help.

[GARoss]

also what is your network device? if your using realtek then you may want to read the links.

let me know what happened

Thanks. The motherboard is an Intel DG965RY & the spec sheet says
Gigabit (10/100/1000 Mbits/sec) LAN subsystem using the Intel® 82566DC
Gigabit Ethernet Controller


I'll try some of the suggestions you posted. The issue seems to happen after a restart (although if failed to connect during install) but works on cold starts or if the PC is shut all the way down. Weird!

[theautates]

So just to clarify things...

There is no problem with your connection during your first install right? then when you have upgraded and restarted your os you are now having some problems with your ethernet card correct?

What does the 'lshw -C Network' command says?

[dineshs]

when the connection is not working try
1)run

sudo dhclient eth0

and see if it works
If not
2)run

sudo service network-manager stop

sudo service network-manager start

and see

[GARoss]

So just to clarify things...

There is no problem with your connection during your first install right? then when you have upgraded and restarted your os you are now having some problems with your ethernet card correct?

What does the 'lshw -C Network' command says?

Thanks,
I had Ubuntu 10.04 32-bit & Windows 7 64-bit as dual boot. Never had internet connection issues with either. I wanted to install 10.10 64-bit over 10.04 32-bit; to do a clean install.

When the install disc booted, it could not connect to the internet nor could I connect manually from the install desktop. Proceeded with install. On restart I still couldn't connect so I restarted & went in Win7 to see if there were issues there. Internet was OK so booted back into Ubuntu 10.10 & this time the internet worked. Updated the software & required a restart but no internet on restart. Restarted; still no internet. Shut down completely, then booted to find internet working. Installed graphic driver & restarted to no internet. Shut down completely, then booted to find internet working. That is the pattern but not always as occasionally it does not connect from a cold start, too. It seems to have a personality of its own.

I'll try 'lshw -C Network' when I boot that PC again & report.

[GARoss]

What does the 'lshw -C Network' command says?

See attached. This is the same with the internet connected or not connected.

[GARoss]

when the connection is not working try
1)run

sudo dhclient eth0

and see if it works
If not
2)run

sudo service network-manager stop

sudo service network-manager start

and see

See attached. Left is with internet not connected. Right - connected

[theautates]

See attached. This is the same with the internet connected or not connected.

hmm... so you do have your ethernet driver installed.

Now we have to find out if the driver you have is matching your current kernel.
first type: 'uname -r', this will show you the current version of the kernel that your using.
next type: 'modprobe e1000e', this will show you if the version of the driver you have is build specifically for your current kernel.

if the version of your driver and your kernel version didn't match then i suggest download the latest driver for your intel network controller and follow this instruction >> here

[GARoss]

hmm... so you do have your ethernet driver installed.

Now we have to find out if the driver you have is matching your current kernel.
first type: 'uname -r', this will show you the current version of the kernel that your using.
next type: 'modprobe e1000e', this will show you if the version of the driver you have is build specifically for your current kernel.

if the version of your driver and your kernel version didn't match then i suggest download the latest driver for your intel network controller and follow this instruction >> here

2.6.35-22-generic & no report when typing modprobe e1000e. See attached.

[73ckn797]

Similar issue. When cold booted, no Internet connection. This happens intermittently on the 3rd or 4th start-up. If I reboot all is working fine.

I am going to monitor this thread and try the suggestions next time it starts with no Internet connection.

Running 10.04. Never had this problem with 9.10 or earlier.

[cariboo]

2.6.35-22-generic & no report when typing modprobe e1000e. See attached.

That's normal, Linux only tells you, you have done something wrong, it doesn't say a thing when you do it right.