I have ubuntu 12.04 and my temperatures are constantly over 55°C
I've tried jupiter power saving mode without results.
I've tried installing ATI proprietary drivers but there wasn't a significant change; although there is a post-installation upgrade driver ubuntu is not able to install, due to some errors I can't understand.
I've not yet tried opening and cleaning the laptop, but I don't think this could be the problem, since on windows, on the same laptop, the temperatures are lower. (When on Ubuntu I can physically sense the heat coming a side of the pc).
What else should I tried?