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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