I updgraded my ubuntu to 12.04 LTS and then installed gnome classic since I do not like unity. But then the volume icon at the up-right corner has disappeared. How can I get it back to that place. Thanks for any help.
from your screenshot, it looks like you have removed the
indicator applet complete applet
Alt+Win+ right click the panel to add the applet. You can similarly remove the other gnome-applets.
If the applet doesnt appear in your list, install the applet from software-center:
or via the command line:
sudo apt-get install indicator-applet-complete
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