same problem here on the x220i (oneiric 32bit). the combination of both settings work for me too, battery usage went down from 15 to 8 watt! On Oct 16, 2011 1:30 AM, "hanfkeks" <818...@bugs.launchpad.net> wrote:
> same problem here, > pcie_aspm=force acpi=noirq > or > i915.i915_enable_rc6=1 > > by itself didn t do any good, but in combination it helped me on a > oneiric amd64 on my Thinkpad X220i with an i3. > > -- > You received this bug notification because you are subscribed to the bug > report. > https://bugs.launchpad.net/bugs/818830 > > Title: > [Sandy Bridge] serious power regression from kernel 3.0.0-6 to 3.0.0-7 > (rc6 disabled) > > Status in “linux” package in Ubuntu: > Triaged > > Bug description: > On Ubuntu Oneiric, I discovered a serious power regression from Kernel > 3.0.0-6-generic to 3.0.0-7-generic. > It is on an Intel Sandy Bridge Laptop. Unplugging the laptop from ac power > source I made the tests without any graphical user interface active with the > same brightness and other settings. When I boot into the kernels I have the > following idle power numbers with > > grep rate /proc/acpi/battery/BAT0/state: > > - Kernel 3.0.0-6: present rate: 1530-1560mW > - Kernel 3.0.0-7: present rate: 1950-2020mW > > It is a more than 30% (!!!) increase in power usage withe the same hw, > same settings, different Kernel version. > Which is really annoying as the laptop fans start working above > 1700-1800mw, so it is night and day in usage comfort the laptop with the two > kernels. > > Here is the kernel log for both versions: > > Log with 3.0.0-6: http://pastebin.com/e0UER3zf > Log with 3.0.0-7: http://pastebin.com/5JcrZ5Br > > Please let me know if you need any more data on this. > > The problem is 100% reproducible. > > To manage notifications about this bug go to: > https://bugs.launchpad.net/ubuntu/+source/linux/+bug/818830/+subscriptions > -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/818830 Title: [Sandy Bridge] serious power regression from kernel 3.0.0-6 to 3.0.0-7 (rc6 disabled) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/818830/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
