Missing panel icons at top right

Question

I have been using 11.10 for a month or two, and I always had these icons at the top right (mail/messenger, battery state, volume control):

After upgrading to 12.04, I lost all of these tray entries except the time. After about 5 or 6 hours of wrangling, I found that I needed to reconfigure network settings in recovery mode and whitelist every program using the tray. I managed to do this, but it's only given me network strength, Dropbox, User Accounts menu and the top-right system menu.

This is all I really need for basic operation of the system, but since I'm used to having Banshee and all my messaging services up there, I'd really appreciate being able to revert to the old settings. I have read that I need to use "Add to panel" but I can't find a way to do this anywhere. If I do right-click, alt-right-click or windows-alt-right-click on the panel, nothing happens at all, so I can't access the menu that way. Anyone with any help would be welcomed. Thanks in advance.

EDIT: Ok, after fiddling with a whole lot of things and several reboots, the missing icons have reappeared. I think what probably did it was purging and re-installing alsa, but I have no idea why. I guess that solves my problem. Now I just need to fix my microphone!

Solution 1

After fiddling with a whole lot of things and several reboots, the missing icons have reappeared. I think I've figured out what happened. I had forgotten that I did the following (not sure if it's all relevant):

sudo add-apt-repository ppa:jconti/gnome3
sudo apt-get update
sudo apt-get install indicator-applet-complete
sudo reboot

I guess that solves my problem, except it would still be nice to be able to access the "Add to Panel" menu. As I said above, the special right-clicks still don't work.

Solution 2

This happened to me when I upgraded from 11.10 to 12.04 but I rebooted in the middle of the installation.

After managing to finish the package installation, this exact same problem was happening to me, and I fixed it by going through Synaptic Package Manager, searching for the indicator- packages, and updating all those that can be updated (in my case, marked with a grey exclamation mark [!]). After restarting Unity, all indicators were back.

Comments

[Eliah Kagan]

Since you've fixed your problem and you believe you know how, I recommend posting your solution as an answer to your own question. (You can then accept your own answer after a short time passes.)

[Murmur]

I was in the process of doing so just now but the question has been closed and I can no longer post answers.

[Anwar]

I see the question is open

[Murmur]

Ok it's open now but when I was writing my answer a message popped up saying I could not. I will answer in 4 hours when I am permitted to. Incidentally, I still can't access the "Add to Panel" menu. (Alt/Windows+Alt) + right clicking does nothing.

[nilsonneto]

is this gnome-classic or unity?

[Murmur]

As far as I know, it's in Unity.

[Sliq]

this does not work as the add-apt-get-repository command does not even exist

[Murmur]

@Panique, maybe it was sudo add apt-get-repository ppa:jconti/gnome3 then. I don't recall, I'm afraid. Edited for formatting.

[Sliq]

i struggled around with this for a while, but found out it is: sudo add-apt-repository XXX

[Ravi Kumar]

Yes it did worked