Understanding Linux* Power Management
The white paper looks at Linux* power management and troubleshooting display-related issues when resuming from S3 suspend state in Linux*, which requires an understanding of the handoff among various hardware and software components.
The document explains the sequence of steps the Intel® Embedded Graphics Driver for Linux goes through during ...power management state transitions. Device drivers are responsible for saving device states before putting them into their low power states and then restoring the device state when the system becomes active.
Read the full Understanding Linux* Power Management White Paper.