I would also like to know if it is possible to reduce Rescheduling interrupts. Is this due to the Intel chipset which produces 35% of the wakeups (81 wakeups from uhci_hcd:USB4, HDA Intel, i915@pci:0000:00:02.0) or ACPI which produces 20% (72) wakeups?
Currently my Asus EeePC 901 spends only 20% in C2 and 20% in C4 state due to this problem producing an estimated 10W power usage at constant 800MHz. The CPU is supposed to use 0.1W
in C4 state and 2.5W in C0 (I know it is coupled with an ancient 90nm Chipset) (OpenSUSE 11.1 + KDE 4.2)