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Matthew Garrett - Red Hat

Run time power management - it's not just suspend and resume

Suspend and resume may be the most obvious components of power management, but in many ways they are the least important. The overall power consumption of a system is related to battery life, electricity bills and heat production. Reducing the power draw of a system at runtime improves all of these. The trick is in doing it in such a way that the user doesn't notice.

This presentation covers the runtime power management functionality available in Linux, ranging from CPU voltage scaling through LVDS reclocking to USB autosuspend. How can you act to reduce your bills now, and how are we going to make things even better in the future?