[lkml]   [2007]   [Jun]   [14]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
    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?

    To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
    the body of a message to
    More majordomo info at
    Please read the FAQ at

     \ /
      Last update: 2007-06-14 09:59    [W:0.028 / U:13.056 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site