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I bought an Asus U36 ultrabook some time ago, because it had 4-6 battery hours (average real values).
Now that I updated to Ubuntu 12.10 x64, My battery lasts less than 3:15 with the type of use I would get 5 hours at least in Windows 7.
First I wondered that the GPU was always "on", rather that using the IGP (low consumption within ivy bridge). However I ran some commands that clearly have shown that I do not even have the GPU working (only the IGP) - which is fine by me.
I also installed bumblebee and jupiter to try to control the power consumption - but the problem is the same - altough I might notice that with jupiter is less bad (also, on demand governor works fine) - but clearly this not normal. I suppose that in a "normal" notebook with 1:30 battery would get 30 minutes or something (which is very bad).
What can I do ?
It's probably related the very strange fact that: it's cold in my domestic environment, and my fan is ALWAYS working very fast. Even when I'm doing nothing, and has power saving governor.