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Solution 1
Step 1 – Remove the Gnome Network Manager: You need to complete this step first because if left installed this application will overwrite any changes you make to your configuration when the system is rebooted. This is apparently where the bug is located.
To remove the Gnome Network Manager issue the following command in the terminal:
sudo update-rc.d -f NetworkManager remove
This will disable and remove the Gnome Network Manager application. Now you will have to edit your configuration manually.
Restart your System
Step 2 – Manual configuration of your network interface: In this step you will manually configure your network interface by editing the following two files using your preferred text editor(nano gedit vi). For the purpose of this example I am using the nano editor.
Step 2.1 – Manually configure your network interface file: You can edit the appropriate file by entering the following command into the terminal:
sudo nano /etc/network/interfaces
Once your prefered editor opens the file you want to enter the following information (changing your addresses where necessary):
auto lo eth0
iface lo inet loopback
iface eth0 inet static
address xxx.xxx.xxx.xxx(enter your ip here)
netmask xxx.xxx.xxx.xxx
gateway xxx.xxx.xxx.xxx(enter gateway ip here)
Be sure to save your changes.
Step 2.2 – Manually configure your dns configuration file: You can edit the appropriate file by entering the following command into the terminal:
sudo nano /etc/resolv.conf
Once your preferred editor opens the file you want to enter the following information (changing your addresses where necessary):
# Generated by NetworkManager
nameserver xxx.xxx.xxx.xxx(enter your dns server ip)
nameserver xxx.xxx.xxx.xxx(enter your alt dns server ip)
Be sure to save your changes.
Step 2.3 – Manually restart your network interface with the new settings: Enter the following command in the terminal:
sudo /etc/init.d/networking restart
This should return a result that looks like the following:
*Reconfiguring network interfaces… [OK]
At this point in your terminal you should be able to run the ifconfig command and the results should reflect your new settings. If the addressing is correct you should have full network access, even after a system restart.
Haven’t tried reinstalling the Network Manger after doing these steps to see if it still works.
Solution 2
Install Wicd if you need both wired and wireless connection
Solution 3
Also, it is said that adding a new config in networkmanager (instead of editing the system default ‘Auto eth0′ stuff) and assign the right MAC address (and the static ip) will fix it, every thing’s fine even after reboot, and you can still use that gnome-networkmanager.
Check this simple guide
Credit Goes here
Static IP ok with solution #8 BUT I would also like to know how to make resolv.conf stay the way we edit it.
Anyone?
I found here how to avoid your resolv.conf:
sudo chattr +i /etc/resolv.conf
Note: this locks the file so even as root you wont be able to edit it. To unlock it use: sudo chattr -i /etc/resolv.conf
Artist, i did your solution steps, and works, I have two issues,
1.- Network Manager doesnt start at Start Up.
2.- I cant resolve DNS and Internet traficct doesnt Work.
if somebody can help me.
Great dude, I was having this problem and now It’s fixed.
Reply 20 by Fabio worked for me. Thanks.
# 20 worked for me too! Thanks Fabio Dude…
#8 and #32 makes my system with static IP thanks a lot.
As soon as i disable the Gnome network manager my nic stops working and i cant seem to get Eth0 back
Thanx, it worked …
Hi Phil!
I think you missed put eth0, after auto lo:
auto lo eth0
Your interfaces file at /etc/network/ must look like this:
auto lo eth0
iface lo inet loopback
iface eth0 inet static
address xxx.xxx.xxx.xxx(enter your ip here)
netmask xxx.xxx.xxx.xxx(enter your netmask here)
gateway xxx.xxx.xxx.xxx(enter gateway ip here)
I hope you can solve your probem.
Hey, great thanks! Any word on whether it’s better practice to add eht0 after auto lo as Peter Mercedes suggested?
Just a quick one… this sometimes NEEDS a reboot to work… well it does with a VirtualBox Ubuntu 9 machine running on OSX. Otherwise.. works like a charm.
i did all the steps bu it says :
warttan@warttan-desktop:~$ sudo /etc/init.d/networking restart
* Reconfiguring network interfaces…
Don’t seem to be have all the variables for eth0/inet.
Failed to bring up eth0.
[ OK ]
warttan@warttan-desktop:~$
please help me
If you check the status of the network interface cards you should be able to see if they have been successfully been assigned a static ip at that point.. do ifconfig again and see. S
I was getting that too, but my statis IP was still working.. maybe its because we stopped the service or something.
I used this when I had Ubuntu 8.10 but now that I’ve upgraded to Ubuntu 9.04 I want to undo this but couldn’t. I tried to reverse whatever I did but it doesn’t seem to work. Any tips?
Under Ubuntu 9.04 I simply disabled Network Manager from System|Preferences|Startup applications. Edit the two files as suggested and reboot and the PC came up answering at the new IP.
OK, after reboot I had to re-edit /etc/resolv.conf and put the name servers back as it dumped the info.