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    SubjectRe: [patch 0/3] AHCI Link Power Management
    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?

    --
    tejun
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