Show Your Support: This site is primarily supported by advertisements. Ads are what have allowed this site to be maintained on a daily basis for the past 18+ years. We do our best to ensure only clean, relevant ads are shown, when any nasty ads are detected, we work to remove them ASAP. If you would like to view the site without ads while still supporting our work, please consider our ad-free Phoronix Premium.
Significant ACPI & Power Management Changes In Linux 3.19
Of interest to most Phoronix readers is that the Intel P-State driver now supports hardware P-States. This Intel CPU scaling driver for modern CPUs now uses CPUID to check whether a feature is supported by the processor, when enabling features by default.
The ACPI/PM changes also have a unified interface for accessiing device properties provided by platform firmware, support for a platform firmware interface based on ACPI regions used in PMIC chips on Bay Trail hardware, ACPI core improvements, and a CPUfreq driver for the Loongson 1B processor.
The full write-up on what these power related changes mean for the Linux 3.19 kernel can be found via the 3.19 merge window pull request.