Re: [RFC] sleepy linux

H. Peter Anvin
2007-12-26T20:43:56Z

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. Heck, I'm constantly frustrated by every distro upgrade breaking
power management for my monitor.

-hpa