Antheas Kapenekakis has introduced a new proposal for a runtime standby ABI within the Linux operating system. This development mirrors features seen in Microsoft's Windows Modern Standby, aiming to enhance the system’s power management capabilities while maintaining responsiveness.
Linux Integration and Advancements
The new ABI for Linux could enable user-space control akin to Windows' Modern Standby. This mode optimizes low-power operations, keeping the network active and the system responsive when the display is turned off. Unlike previous solutions, this proposal promises a more intricate handling of ACPI LPS0 notifications.
The proposed ABI facilitates the sending of firmware notifications to simulate an asleep appearance without actually suspending the kernel. This allows essential tasks and computations to continue running in the background.
Implementation and User Impact
The patches, as outlined by Kapenekakis, transition Device Specific Methods (DSMs) from their traditional call point at suspend's end to a new initiation at its onset. This transition function is now accessible via
Although the patches are still in testing phases, the essential framework is available for initial evaluation, setting the stage for future user-space access once fully vetted.
Future Outlook
This proposed runtime standby ABI marks a significant milestone for Linux, enabling operations similar to those in Windows Modern Standby. If widely adopted, it could provide a substantial tailwind for Linux by enhancing its ability to manage power and maintain system activity efficiently.
