I recently installed ubuntu and now have a dual boot windows and ubuntu machine. The problem is that whenever I run ubuntu, the computer heats up even when I'm doing the most meager of tasks. For example, when it's idle it's usually at 64 degrees C and once I open firefox and only have a couple of tabs open it shoots up to over 80 degrees C! My computer runs much cooler on windows. I suspect some unnecessary use of resources.
The question, what's the best way to diagnose what's going on?