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AMD Linux Patches Aim To Improve S5 Power Consumption
An ongoing area of work for AMD's Linux client team is on enhancing the power management and overall power savings/efficiency support for Ryzen platforms on Linux
AMD Linux engineer Mario Limonciello posted the latest patches this week for improving S5 power consumption. These patches change the Linux power management code to use hibernate flows for system power off, putting PCI Express ports with downstream devices into D3 mode at hibernate, avoid evicting resources at S5 for the AMDGPU DRM graphics driver, and hooking SCSI and USB code into system suspend callbacks. If for some reason that fails or is not supported, unwind and do the previous S5 flow that will wake all devices and run their shutdown callbacks."
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