Unfortunately kernel 2.6.38-12.51 doesn't improve the situation that much for me either. Maybe a bit, but I'm not sure about that. I was surprised to find out that even pcie_aspm=force and i915_enable_rc6=1 don't improve power consumption anymore. Some months back pcie_aspm=force still improved the situation for me.
My system is a ThinkPad T420 with Sandy Bridge i5, integrated i915 video controller and running up-to-date Ubuntu Natty. I compared the output of powertop with kernel 2.6.38-11.50 and with kernel 2.6.38-12.51, both with and without the boot options, and with and without firefox running. See my exact results attached. ** Attachment added: "comparison of powertop output" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/760131/+attachment/2515497/+files/powertop-comparison.txt -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/760131 Title: Power consumption raised significantly in natty To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-release-notes/+bug/760131/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
