see this post:
http://askubuntu.com/questions/125367/enabling-mic-mute-button-and-light-on-lenovo-thinkpads
January 20, 2013
0
getting mic mute button to work on w510 and other lenovo laptops
By thomas in Ubuntu 12.04, w510Warning: count(): Parameter must be an array or an object that implements Countable in /var/www/mgis.dk/about/wp-includes/class-wp-comment-query.php on line 399