Volume panel not there any more in 11.10

Verify if indicator-sound is installed.
Please open a terminal: ctrl+alt+t
Insert:
sudo apt-get install indicator-sound

In case make sure to have all updates:
sudo apt-get update
sudo apt-get upgrade
sudo apt-get -f install

https://help.ubuntu.com/community/AptGet/Howto

Hello. Thank you for your fast answer.

I first checked and have all the updates. Then I did the command sudo apt-get install indicator-sound.

Here is the prompt:

Reading state information... Done
indicator-sound is already the newest version.
The following package was automatically installed and is no longer required:
  libgladeui-1-11
Use 'apt-get autoremove' to remove them.
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.

Should I use the command: apt-get autoremove

Thank you,
Gil

By the way I have sound is working and did after the upgrade. Just no longer have a panel it in the notification.

Thx

Not sure what's missing there.
Did you reboot?
Please post output of:
/usr/lib/indicator-sound/indicator-sound-service

Maybe try removal and reinstallation of indicator-sound.
Create a test-user account to see if it appears there.

/usr/lib/indicator-sound/indicator-sound-service
** (process:2208): DEBUG: Building new Mute Menu Item
** (process:2208): DEBUG: Attempt a pulse connection
** (process:2208): DEBUG: connecting - waiting for the server to become available
** (process:2208): DEBUG: music-player-bridge.vala:62: interested client found : banshee
** (process:2208): DEBUG: music-player-bridge.vala:239: determine key result = banshee

(process:2208): GLib-GIO-CRITICAL **: g_file_info_get_name: assertion `G_IS_FILE_INFO (info)' failed
** (process:2208): DEBUG: metadata-menu-item.vala:82: file name = (null)

** (process:2208): WARNING **: metadata-menu-item.vala:66: could not create a temp dir for remote album art, it must have been created already
** (process:2208): DEBUG: metadata-menu-item.vala:42: JUST ABOUT TO ATTEMPT PLAYER NAME SETTING Banshee
** (process:2208): DEBUG: player-controller.vala:141: establish_mpris_connection - Not ready to connect
** (process:2208): DEBUG: player-controller.vala:76: New player controller for Banshee with icon name media-player-banshee
** (process:2208): DEBUG: music-player-bridge.vala:62: interested client found : rhythmbox
** (process:2208): DEBUG: music-player-bridge.vala:239: determine key result = rhythmbox

(process:2208): GLib-GIO-CRITICAL **: g_file_info_get_name: assertion `G_IS_FILE_INFO (info)' failed
** (process:2208): DEBUG: metadata-menu-item.vala:82: file name = (null)

** (process:2208): WARNING **: metadata-menu-item.vala:66: could not create a temp dir for remote album art, it must have been created already
** (process:2208): DEBUG: metadata-menu-item.vala:42: JUST ABOUT TO ATTEMPT PLAYER NAME SETTING Rhythmbox
** (process:2208): DEBUG: player-controller.vala:141: establish_mpris_connection - Not ready to connect
** (process:2208): DEBUG: player-controller.vala:76: New player controller for Rhythmbox with icon name rhythmbox
** (process:2208): DEBUG: Authorizing
** (process:2208): DEBUG: Setting name
** (process:2208): DEBUG: PA_CONTEXT_READY
** (process:2208): DEBUG: server info callback
** (process:2208): DEBUG: default sink name from the server ain't null'
** (process:2208): DEBUG: default source name from the server is not null'
** (process:2208): DEBUG: Pulse Server has handed us a new default sink
** (process:2208): DEBUG: emitting state signal with value 2

(process:2208): libindicator-WARNING **: Name request failed.
** (process:2208): DEBUG: Service shutdown !

I figured out the problem.
A simple one.
After installing 11.10. I went straight to system settings> appearance.
I hated the theme that came up after the install.
I changed the theme to "high contrast".
That's when I must have lost some of my icons but did not notice.
After I twigged on what I might have done, I put it to Radiance.
All my icons are back.

I believe the "High Contrast" config file must have been busted.

Thank you for your help

Thanks for adding the information regarding 'high contrast' and getting it solved by switching the theme. However it isn't expected that indicators disappear when switching the theme, maybe consider to report a bug.