Ubuntu网络连接图标丢失 Network manager indicator missing

问题：

I recently upgraded from 11.10 to 12.04. My first attempt failed, and I received an error stating that not all of the required packages were downloaded. Before (successfully) attempting again, I noticed that there was no longer a networking indicator in the upper panel. The indicator did not reappear with the installation of 12.04.

To be clear, my wireless connection has experienced no problems, despite the missing indicator.

Here are the solutions that I have found which did not work for me:

1. Editing/etc/NetworkManager/NetworkManager.confand replacing[ifupdown] managed=falsewith=true.
2. Reinstallingnetwork-manager(viaapt-get install --reinstall).

I am currently running 12.04 on an Asus Eee PC 1005 HA, and I am new to seeking solutions through forums, so I apologize if I have neglected to provide some vital information about my hardware.

最佳答案：

Motivated by this post on Ubuntuforums.org, I have found a solution to my issue in two steps.

1. Purge and reinstall network-manager-gnome:

   sudo apt-get purge network-manager-gnome && sudo apt-get install network-manager-gnome

2. Add nm-applet to the Startup Applications (which may be found by entering "Startup Applications" in the Dash).

I verified that the latter step was necessary, as the indicator did not appear after login without this addition of nm-applet to the Startup Applications.

Ｃyper: 我试了最后一步并不需要，安装直接重启就可以．（不过装完后，我敲nm-applet命令玩了一下，敲完后panel上就会出现那个网络图标）