JSI Tip 3762. Your laptop computer may be unable to enter the C3 processor power-saving state?

The active bus polling that is required to maintain communications with USB devices can prevent the CPU from switching to a C3 power-saving state.

The default polling interval for USB devices is one millisecond, which may interferewith the ability to enter a C3 power-saving state.

NOTE: This problem can exist even if no devices are connected to the USB controller.

To resolve the issue:

1. Use Regedt32 to navigate to HKEY_LOCAL_MACHINESystemCurrentControlSetControlClass\{36FC9E60-C465-11CF-8056-444553540000}000.

2. Edit or Add Value name IdleEnable, a REG_DWORD data type. Set the data value to a number between 2 - 5 milliseconds.

3. If additional subkey exists (01, 02, etc.), repeat step 2 for each subkey.