Now that I have my desktop beast running I barely use my laptop any more so I decided to run this as my $1,500 facebook machine and use Ubuntu as the daily OS. The problem isn't that I'm getting about 3 hours of battery life (4 hours with the screen brightness on lowest, keyboard backlight off, and volume on mute) but it's that the guide I was using doesn't fully work as it says.
I used this guide and installed a compiled version of Ubuntu 12.10 for MacBook Pro 8,1
I used that guide and followed all the steps, I used an ethernet connection to do all of the updates and had to manually enable WiFi like it says further down that page. After enabling WiFi I went down futher to the battery section and there is a link that brought me here.
From there it says to do a number of things for the battery.
My battery reads 57.7wH however using the code
won't work. I had to use a different code I googled.
To start up PowerTop the code supplied says
however I had to use
which then shows that my watt hour usage is 21.7wH
sudo powertop --calibrate
I've tried the other codes further down the page and nothing seems to be working for me, I'm still only getting between 3 and 4 hours battery life when I should be getting between 8 and 12.
I would really like to start using this as my daily laptop again but this time with Ubuntu but this battery thing is killing me, I'm away from a charger for a lot longer then 3 to 4 hours a day. I would just barely make it though the day on a full battery running OS X so I need that battery life back to make this a feasible reality.
Thanks for any input, I looked into laptop-mode but that is apparently been disabled in 12.10.