Issues with intel_idle

OS must manage platform/device latency limitations
No ACPI BM_STS bit...
Exactly what PM_QOS is for...

OS must manage AC/DC C-state policy (if any)
No ACPI _CST re-evaluation upon AC/DC transition
PM_QOS useful here?

OS must handle any hardware/platform bugs
No bug workarounds via ACPI BIOS update