I have Linux Mint 12 with Gnome on my laptop (Acer Aspire 5750G - Intel i3 2310m(Sandy-Bridge) - 4 GB DDR3-RAM - Hybrid-Graphics by Nvidia Geforce and Intel HD).
My problem now is, that I have a AC runtime of ca. 2 - 2,5 hours.. As a comparison: Under Win7, my runtime is at least 4 hours..
And yes, i tried powertop, jupiter-applet, tlp and so on, but nothing works fine..
My fan is running hard under LM12 and the laptop gets comparative warm.
I'm researching for the problems for about a month and don't find a solution.
So my questions: 1) How can i apply the tips from powertop?
2) I have read, that there are wake-up problems with the Sandybridge-Chipsets, is there any solution?!
I hope, anybody can help me, because i really love to work with LM!
Oh, and sorry for my creepy English!