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I am using Ubuntu 12.04 and I installed fallback version of desktop. I have a problem about my network manager in system tray. I can see network manager but no button is working in network manager in system tray.

Network Manager

I could not make buttons in network manager as seen in the image worked.

What can be the solution of this problem?

Thank you!

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So you can't click on any of those buttons? Can you open a terminal (Ctrl+Alt+T) and type sudo service network-manager restart, and check again? – Alaa Ali Jul 11 '13 at 9:12
They are still not working. I can clicked but there is no reaction. – Whispered Jul 11 '13 at 9:16
up vote 1 down vote accepted

Try restarting the applet:

killall nm-applet
nm-applet &
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After numerous attempts to fix the issue,I resorted to installing an application "Wicd Network Manager" available in the Software Center.Works pretty neat.

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