PowerTOP version 1.2       (C) 2007 Intel Corporation                       

Cn          Avg residency (5s)  Long term residency avg
C0 (cpu running)        ( 5.2%)
C1                0.0ms ( 0.0%)                   0.0ms
C2                1.8ms ( 4.9%)                   1.9ms
C3                1.8ms (89.9%)                   1.7ms

No detailed statistics available; please enable the CONFIG_TIMER_STATS kernel option
This option is located in the Kernel Debugging section of menuconfig
(which is CONFIG_DEBUG_KERNEL=y in the config file)

Suggestion: Enable the CONFIG_NO_HZ kernel configuration option.
This option is required to get any kind of longer sleep times in the CPU.

lap@top:~/Desktop$