Are there any tricks (like boot parameter or unofficial kernel or anything), which would improve Ubuntu 12.10 on sandy bridge with Intel HD 3000? It is not totally bad now, but maybe there is something to do to make notebook cooler and quieter?
Depending on your kernel version, try adding
I'm on Debian, so maybe looks different in Ubuntu. Also some kernel-versions run hotter, like kernel 3.7 runs 10°C hotter for me (I heard in upcoming kernel 3.8 above options aren't needed).
If there's a seperate Nvidia graphics card, checkout Bumblebee for turning it off, which also should help on temps and noise.