Re: overheating in ubuntu 12.04
A temp of 60-65 is not bad, for a laptop -- unless you get MUCH lower temps in Windows.
There was a kernel bug in recent Ubuntu versions that prevented the processor from throttling back to idle state, causing it to run faster -- and hotter.
That bug did not get fixed in Ubuntu 12.04 and don't know if it got fixed in 12.10.
Jupiter is really about the only recourse you have.
Ubuntu 16.04 Mate, Mint 17.3; MS Win 8.1, MS Win10 Pro.
Will not respond to PM requests for support -- use the forums.