> I have been looking into the possibility of having the system > automatically enter and exit S1 to save power when idle, but actively in > use. For instance, while you are only browsing the web on your laptop, > your eyes spend 15 seconds scanning the page while the system is > otherwise, doing nothing but wait for your next input. It would be nice > if it could seamlessly enter S1 during this time to save power, and exit > when you press a key, move the mouse, or receive a message on IRC. > > Unlike S3, S1 keeps the Vcc power plane on and all devices remain in D0 > or D1, so the screen remains on and visible, so it should be possible to > use this state transparently without the user even being aware of it. > Since everything remains on, no hardware needs reinitialized when > resuming from S1. I'm not aware of any ACPI systems that can keep the display enabled when in S1 (or S3). If you've been able to get into this state, I'd like to know more about it. Please measure the power difference between S0 and S1 -- don't assume that S1 consumes less power than S0. Also, note that the latency difference between S1 and S3 may effectively be 0. cheers -Len Brown, Intel Open Source Technology Center -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
