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 -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html _______________________________________________ linux-pm mailing list linux-pm@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/linux-pm
