I was recently checking my power consumption with powertop, and it was about 9 or 10 watts. My impression is that just sitting around with the screen not too bright it should be around 5 watts, but I wasn't monitoring this very closely until recently.
I have tried (and currently am booting with):
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GRUB_CMDLINE_LINUX_DEFAULT="quiet splash i915.i915_enable_rc6=1 i915.semaphores=1 pcie_aspm=force"
I upgraded to a recent kernel as per http://www.upubuntu.com/2013/02/installupgrade-to-linux-kernel-376-in.html.
At some point very recently (after the kernel update?) powertop (v1.97) stopped showing wattage. Odd, but maybe powertop is out of date. So I tried version 2.2 from here: https://01.org/powertop/downloads but it won't configure because it complains that it can't find ncurses. Ok, so I found a patch here https://lists.01.org/pipermail/powertop/2012-July/000200.html that is supposed to eliminate the ncurses dependency (which is also odd because it looks like ncurses is available in Mint, but not in the flavour that powertop is looking for). Anyway, the patch didn't apply properly.
I think I may be going down a rabbit trail here.
How can I fix or replace powertop so I can track my power consumption? Better yet, how do I restore the solid six (or more!) hours of battery life of which I know this otherwise lovely little laptop is capable, so I don't even need to check powertop? Suggestions? Thanks!