On Thu, 27 Jan 2011, Phillip Susi wrote: > The voltage is controlled by the platform and should already be set to a > level appropriate for that frequency. AFAIK, recent intel cpus have > MSRs that configure the voltage for each P-state, but these are set up > by the bios and shouldn't need changed. "Need", certainly not. But downvolting and downclocing are very effective ways to get some extra battery time (or at least used to be, I have no idea if they still are that useful in the newest processors), so you will find that there is a community of "downclockers" among laptop enthusiasts, much like the "overclock" community on the gaming enthusiasts :P -- "One disk to rule them all, One disk to find them. One disk to bring them all and in the darkness grind them. In the Land of Redmond where the shadows lie." -- The Silicon Valley Tarot Henrique Holschuh -- 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