Ubuntu – Network Manager stops working after an update to ca-certificates

network-manager

Fresh Beta install on Aspire 5741 (NEW70) – network ok

After installation, run update (485 updates) – install completes ok

After update and reboot, Network Manager fails to open. Unable to connect to LAN.

Though my hardware, both WLAN and LAN, are still recognised, however network icon disappears from taskbar, and I am unable to launch NM-APPLET both from menu and terminal.

Error "missing folder" in terminal

Tried both the amd64 and i386 versions.

Ubuntu 10.10 runs fine on laptop.

Best Answer

The same happened to me this morning. You can activate yout network like this:

sudo service network-manager stop
sudo dhclient eth0
sudo dpkg --configure -a

After that you can start a partial upgrade:

sudo apt-get dist-upgrade -f

If this doesn't work look here:

Network-Manager

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Network Manager Applet Menu Freezes and Does Not Respond – Troubleshooting

Certain sources (notably Elementary Desktop's PPA) have a version of network-manager-gnome which is newer than the one in the canonical maverick repository. A fix has been issued for Natty, but is not in the Maverick repos yet. So Ubuntu sees the newer version in elementary-desktop, uses that instead of the canonical one and, hence, the bug.

The solution is to roll back the version of network-manager-gnome to the 0.8.1+git.20100809t190028.290dc70-0ubuntu3 from 0.8.2+git.20101123t161608.f143e76-0ubuntu1

This can be done from synaptic by searching for network-manager-gnome and then clicking 'force version' in the package menu and selecting the 0.8.1 version.

Ubuntu – network manager not working

Check your network configuration files are same or not. These files are default configuration of Ubuntu.

Open Terminal and type these commands:

sudo nano /etc/network/interfaces

Now edit the file:

auto lo eth0
iface lo inet loopback
inface eth0 inet dhcp

Now save that file.

After this step you have to open another file via terminal.

sudo nano /etc/NetworkManager/NetworkManager.conf

[main]
plugins=ifupdown,keyfile,ofono
dns=dnsmasq

[ifupdown]
managed=false

After doing this editing job. Run this final command :

sudo service network-manager restart

And then restart your Ubuntu.

Best Answer

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Network Manager Applet Menu Freezes and Does Not Respond – Troubleshooting

Ubuntu – network manager not working

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