[ubuntu] High Pitched whine in Dell Latitude D820 using Ubuntu 12.04

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http://ubuntuforums.org – Hello everyone, I have a Dell Latitude D820. I am running Ubuntu 12.04. I removed Windows 7 completely (It was running fine then). There seems to be a very high pitched sound coming from within the chassis. This is not a speaker or a fan sound. Sort of a car horn that has been turned down in the background but held in place with a glue tape. I tried the tweak at the support.dell.com website (the c3 state thing). It did not go away. I observed that whenever I scroll (firefox only mostly using the touchpad or the arrow keys), the sound stops. Also, when there is flickering of the the second LE (Hardware)