I did some power tests on my Samsung N220 Plus (atom n450 based netbook) using phoronix test suite battery power usage test.
The details are published here: http://openbenchmarking.org/result/1107249-GR-1107245GR43 In summary, the results are this (average power use in mW): 10.10 7660.37 11.04 unity pcie_aspm=force 8263.59 11.04 classic (no effects) pcie_aspm=force 8156.98 11.04 unity 8795.90 11.04 classic (no effects) 8194.49 Especially notice the following points: - Difference between unity and classic (no effects) when not using pcie_aspm=force --> ~600 mW (~7%) - Difference between unity and classic (no effects) when using pcie_aspm=force --> ~100 mW (~1%) - Lack of difference between pcie_aspm=force and regular when using classic (no effects) --> ~40 mW (~0.5%) - Difference between 10.10 and 11.04 classic (no effects) with or without pcie_aspm=force --> ~500 mW (~7%) Notes: 10.10 was using no effects, desktop edition ubuntu (so no compiz) Conclusions: - pcie_aspm=force makes a difference when using unity - pcie_aspm=force makes no difference when not using desktop effects - when not using desktop effects, 11.04 still takes 500 mW more than 10.10 (independent of pcie_aspm=force) So pcie_aspm=force does not fix the entire problem and (at least in my tests) only makes a difference when unity/compiz is used. This might be related to gpu usage for desktop rendering, but I don't know enough about the differences to really comment on this. If anyone knows more tests I can do to further narrow down what might be the cause, please let me know. Greetings, Erwin Junge -- 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 ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
