Amd Begins Plumbing Apci C4 Support in the Linux Kernel for Power Savings
Posted4 months agoActive4 months ago
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Linux KernelAmdPower ManagementAcpi
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Linux Kernel
Amd
Power Management
Acpi
AMD is adding support for ACPI C4 power state in the Linux kernel to improve power savings, but commenters are seeking more context and clarity on its implications.
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Sep 16, 2025 at 1:37 PM EDT
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Discussion (3 comments)
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notherhack
4 months ago
1 replys/APCI/ACPI/. How embarrassing for them.
LargoLasskhyfv
4 months ago
Nope. That's AMD's Power Clamping Infrastructure.
jeffbee
4 months ago
It would be nice to know what this actually does, to which CPUs, installed in what platform. There is only tenuous correspondence between ACPI C-states and the energy saving features of CPUs, and Intel started diverging from ACPI definitions around the time of Haswell, so a direct comparison is difficult.
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ID: 45265299Type: storyLast synced: 11/20/2025, 6:03:33 PM
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