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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.

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marked as duplicate by belacqua, Thomas Ward, user68186, Eric Carvalho, Luis Alvarado May 4 '13 at 4:09

This question was marked as an exact duplicate of an existing question.

One of the problems is the fact that the governor is always set on performance. Jupiter corrects that, but still a noticeable difference. – Tiago Mar 9 '13 at 0:09
  1. Modify your governor to "quiet" or "Battery Performance"
  2. If you don't know how to do that, go into your BIOS settings and look for a Fan setting
  3. If it doesn’t have one, download "Speed Fan" and modify the value, so that the fan will only run when the CPU is active beyond a certain percent, Or when your machine reaches a threshold of temperature.
  4. Hope this helped
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