Messages in this thread | | | Date | Thu, 14 Jun 2007 16:56:43 +0900 | From | Tejun Heo <> | Subject | Re: [patch 0/3] AHCI Link Power Management |
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Kristen Carlson Accardi wrote: >>>>> I'm not sure about this. We need better PM framework to support >>>>> powersaving in other controllers and some ahcis don't save much >>>>> when only link power management is used, >>>> do you have data to support this? >>> Yeah, it was some Lenovo notebook. Pavel is more familiar with the >>> hardware. Pavel, what was the notebook which didn't save much power >>> with standard SATA power save but needed port to be completely turned off? >> Thinkpad x60. Some one Kristen probably used while developing the >> patch :-). > > Yes - that confirms my conclusion that the first patch just wasn't > done correctly - cause when I measure the power savings with a power > meter on the X60 with my patches I see ~ 1W.
Hmmm... Could it be that the controller doesn't enter powersave state when SControl is written to?
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