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Power consumptionPower consumptionPosted Apr 26, 2010 21:47 UTC (Mon) by nix (subscriber, #2304)In reply to: Power consumption by pr1268 Parent article: The cpuidle subsystem
Perhaps C-states are disabled in your BIOS. (Personally, I've disabled them on my suspended-when-not-in-use desktop simply because when C states are disabled, if the TSC is otherwise stable it can be used as a time source rather than the expensive HPET. On always-on servers and power-important laptops and netbooks, a bit of timekeepoing expense is worth the power saving, so it's best to turn C states on.)
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Power consumption Posted Apr 27, 2010 0:45 UTC (Tue) by pr1268 (subscriber, #24648) [Link] I've got S3 enabled in BIOS (I actually rebooted just to look), but I'm curious whether I've got all the proper kernel options set and modules compiled/installed. Sounds like a research project... :-) Thanks for the replies.
S3 is different Posted Apr 29, 2010 22:29 UTC (Thu) by pflugstad (subscriber, #224) [Link]
IIRC, S3 is suspend-system-to-RAM, as opposed to the C states, which are just CPU states.
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