AMD engineers have begun ironing out ACPI C4 support for the Linux kernel in order to provide greater power savings on newer AMD Ryzen platforms that have begun to support this deeper sleep state. Sent out to the Linux kernel mailing list yesterday were the initial patches for preparing ACPI C4 support within the ACPI "processor_idle" driver. AMD Linux engineer Mario Limonciello commented on the patch series: "Some AMD systems have introduced support for ACPI C4. Systems that support ACPI C4 wi...