Could not launch "Main Menu" option in System Preference

Solution Verified - Updated -

Issue

  • Want to get the microphone (for Skype) working.

  • To achieve this was looking forward for Main Menu option, Could not launch "Main Menu" option in system Preference :

system->>Preferences->>Main Menu 
  • As soon as I enter the request below message is observed on screen:
Could not launch 'Main Menu'
Cailed to execute child process
"alacarte" (no such file or directory)
  • Tried installing alacarte but still cannot activate the microphone (external LogitechHD 720P)
[root@example.com]# yum install alacarte.
  • Under System -> Preferences -> Sound only "Internal Audio Analog Stereo". Tried both: Line-In and Microphone. Neither option work.

  • Does this mean the system cannot use the external camera+microphone (they plug into an USB connector)?

  • Tried to install GNU libraries to work around the issue but instead but got stuck with that installation.

Environment

  • Red Hat Enterprise Linux 6.5
  • microphone (external LogitechHD 720P)

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