Comment 32 for bug 524281

Maybe the problem is wider as it extends to intel atom too: here is my N270 from ASUS 1201NL:

Wakeup-da-idle al secondo: 130,6 intervallo: 5,0s
Utilizzo energetico (stima ACPI): 9,4W (2,9 ore)

Cause principali di wakeup:
  22,0% ( 38,0) [kernel scheduler] Load balancing tick
  13,7% ( 23,6) [ath9k] <interrupt>
  13,0% ( 22,4) firefox-bin
  12,2% ( 21,0) [extra timer interrupt]