Comment 39 for bug 177895

Same here

using :
Intel core 2 duo T5200
Linux clbr 2.6.24-11-generic #1 SMP Fri Feb 29 22:08:31 UTC 2008 i686 GNU/Linux

     PowerTOP version 1.9 (C) 2007 Intel Corporation

Cn Avg residency P-states (frequencies)
C0 (cpu running) (12.4%) 1.60 Ghz 1.7%
C1 0.0ms ( 0.0%) 1333 Mhz 0.0%
C2 0.4ms ( 1.1%) 1067 Mhz 0.0%
C3 1.5ms (86.6%) 800 Mhz 98.3%

Wakeups-from-idle per second : 609.8 interval: 5.0s
no ACPI power usage estimate available

Top causes for wakeups:
  48.5% (448.8) <kernel IPI> : Rescheduling interrupts
  28.3% (261.6) <interrupt> : PS/2 keyboard/mouse/touchpad
   4.8% ( 44.0) <interrupt> : HDA Intel
   4.2% ( 38.8) <interrupt> : extra timer interrupt
   3.3% ( 30.8) <interrupt> : iwl3945
   1.8% ( 16.8) totem : schedule_timeout (process_timeout)