[akkartik]

Here's a snapshot from my powertop:

    Usage     Device name
   3598 rpm     Laptop fan
    1.7%        CPU use
  100.0%        Display backlight
  100.0%        PCI Device: Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 4
  100.0%        PCI Device: Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller
  100.0%        PCI Device: Ricoh Co Ltd Device e823
  100.0%        PCI Device: Intel Corporation Centrino Ultimate-N 6300
  100.0%        PCI Device: Intel Corporation 6 Series/C200 Series Chipset Family SMBus Controller
  100.0%        PCI Device: Intel Corporation 6 Series/C200 Series Chipset Family 6 port SATA AHCI Controller
  100.0%        PCI Device: Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 2
  100.0%        PCI Device: Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 1
  100.0%        PCI Device: Intel Corporation 6 Series/C200 Series Chipset Family High Definition Audio Controller
  100.0%        PCI Device: Intel Corporation 6 Series/C200 Series Chipset Family KT Controller
  100.0%        PCI Device: Intel Corporation 2nd Generation Core Processor Family DRAM Controller
  100.0%        Radio device: iwlagn
  100.0%        PCI Device: Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 5
    0.0 pkts/s  Network interface: wlan0 (iwlagn)
    0.0 pkts/s  Network interface: eth2 (e1000e)