pcie_aspm=force added to my grub boot menu is what netted me the largest gain. I am running an i5 with intel graphics and kernel 3.1.4. I am going to try a 3.2 kernel later on to see if there is any difference. The other options (i915.i915_enable***, etc.) provided about the same increase in battery life as powertop. Phoronix has a really good article about these and about the different kernels.
Last edited by xyzzyman; December 29th, 2011 at 07:35 AM.
The best option is to wait for next Ubuntu release
A stopped clock shows right time twice a day
Last edited by divergex; December 29th, 2011 at 09:01 AM.
I had the exact same problem as fictivetoast (though I have a dell vostro v131). I edited grub as you were suggesting, and everything seems fine, but I was wondering what kind of problems this may cause, so that I can keep an eye on them. For example, is it possible that this fix cause a slight overheating? I didn't check cpus and hdd temperatures before changing grub, but now using lm-sensors I saw the cpus stay between 47°C and 51°C and hdd around 40°C. Is it normal?
Last edited by mattia.tamellini; December 29th, 2011 at 12:05 PM.
hello! i'm not a professional ubuntu user, i have a dell latitude E5420 i5. ubuntu battery life is quite lower than on windows 7. how can i add "those additional parameters to my grub conf"??