I have an Acer 5740dg (core i5) and Ubuntu 11.10. After tweaking a little with the grub workaround and jupiter I don't have any heating problems anymore. Its even cooler than Windows. Except I'm playing media. Even under Audacious it heats 10° C up. Is this normal for such simple Audio Player (I have this with every player)? I already switched from Pulse to ALSA, but doesn't help. With htop I see that the CPU isn't asked very much. What could be the reason?