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    SubjectRe: [RFC] sleepy linux
    Pavel Machek wrote:
    > On Wed 2007-12-26 12:43:56, H. Peter Anvin wrote:
    >> Oliver Neukum wrote:
    >>> Am Mittwoch, 26. Dezember 2007 19:56:59 schrieb H. Peter Anvin:
    >>>>> 3) Network card that is either down
    >>>>> or can wake up system on any packet (and not loose too many packets)
    >>>>>
    >>>> This is the big crux I see. You're going to constantly wake up the
    >>>> machine due to broadcast packets, and spend a lot of power just going in
    >>>> and out of S3.
    >>> How many machines care a lot about saving power while they are connected
    >>> to an ethernet? Wlan might be more of a problem.
    >> A lot of them should. An inordinate amount of machines sit there burning
    >> power for no reason. You can argue that S3 isn't needed -- that nohz +
    >> C3/C4 + turning off the screen would be enough, and that might be
    >> + legit.
    >
    > NOHZ + C4 + turn off screen + turn off disk + turn off SATA is still
    > ~8W on thinkpad x60.
    >
    > S3 is ~1W.
    >
    > That's quite significant difference.
    >
    > (But yes, connected-to-ethernet is not most important use scenario.)
    > Pavel

    Still... if we could get the desktops of the world down anywhere close
    to that range when not used, it would be a huge win.

    -hpa


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