Re: [RFD] Automatic suspend

[Matthew Garrett]

On Mon, Feb 16, 2009 at 11:58:31PM +0100, Pavel Machek wrote:

> If no devices are being used, and next wakeup is far enough in the
> future, just put system to sleep. Long enough == so far away that
> suspend/wakeup is short compared to that... like 20 seconds on PC.

This is intrinsically difficult with PCs, since we have such a poorly 
defined set of wakeup events. We can't wakeup on generic network 
traffic, just WoL. Many machines won't wake up on keyboard events. 
Meanwhile, on embedded it's becoming a less interesting problem because 
idle and suspended are often now equivalent states. Concentrating on 
runtime PM of as much hardware as possible is arguably more interesting 
for the majority of use cases.

-- 
Matthew Garrett | mjg59@xxxxxxxxxxxxx
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/