Upgrade to 12.04 in ubuntu stuck

Upgrade to 12.04 in ubuntu stuck

This time the crash is quiet. Nothing is happening. The screen displays the following and the disk light occasionally blinks but there is no progress indicated on the screen.

During previous upgrades, something similar happened at different points with absolutely no way to fix the problem. This time there is a secret message. You have to select the ► in front of Terminal to find out what is happening. The following is the result.

The solution, after you find the hidden problem, is to tab down to <Ok> and press enter.

NetworkManager Is Not Running...

The Ubuntu network icon displays the message NetworkManager is not running.... You can start the Network manager in a variety of ways. The most common suggestion on the Web is to go back to 1980, open a DOS/terminal box/window and type in the following command. (Pretend you are using 1935 teletype to create paper tape to feed into the first electronic computer in the world (Invented by the British at Bletchley Park).)

sudo /etc/init.d/network-manager start