Comment 153 for bug 760131

I upgraded to 2.6.38-11 and ran the battery-power-usage test from phoronix test suite.

The results have been added to: http://openbenchmarking.org/result/1107243-GR-1107245GR40

The summary is as follows (avg power usage in mW):

unity aspm 8582.55
classic aspm 8402.90
unity 8184.63
classic 8150.33

classic is again the (no effects) variety.

Oddly, the latest kernel update has made pcie_aspm=force increase power usage vs no pcie_aspm=force. I'm completely stumped. Also, the difference between unity or classic has vanished when not using pcie_aspm=force. The difference of ~500 mW wrt 10.10 is still there though.

I'm getting the idea that pcie_aspm is a lot less related to the current power issues than we previously thought. Any ideas on extra tests to either confirm or deny this are very welcome and will be executed swiftly. I have two of these machines (identical), so can potentially perform different tests in parallel.

Greetings,

Erwin Junge