Top causes for wakeups:
  25,2% ( 55,6)       <interrupt> : i8042 
  16,3% ( 36,0)                sh : queue_delayed_work_on (delayed_work_timer_fn) 
  10,7% ( 23,7)       <interrupt> : iwl3945 
   6,2% ( 13,7)     mixer_applet2 : schedule_timeout (process_timeout) 
   5,1% ( 11,3)       <interrupt> : libata 
   4,5% ( 10,0)     scim-launcher : schedule_timeout (process_timeout) 
   4,4% (  9,8)              Xorg : do_setitimer (it_real_fn)
   3,6% (  8,0)         amarokapp : schedule_timeout (process_timeout)
   3,6% (  8,0)   <kernel module> : usb_hcd_poll_rh_status (rh_timer_func)
   3,4% (  7,4)             xchat : schedule_timeout (process_timeout)
   2,0% (  4,4)       firefox-bin : futex_wait (hrtimer_wakeup)
   2,0% (  4,4)    scim-panel-gtk : schedule_timeout (process_timeout)
   1,0% (  2,3)   multiload-apple : schedule_timeout (process_timeout)
   0,9% (  2,0)              kadu : schedule_timeout (process_timeout)
   0,7% (  1,5)         nm-applet : schedule_timeout (process_timeout)
   0,7% (  1,5)            mysqld : schedule_timeout (process_timeout)
   0,7% (  1,5)    wpa_supplicant : schedule_timeout (process_timeout)
   0,6% (  1,3)       <interrupt> : acpi
   0,5% (  1,0)       <interrupt> : uhci_hcd:usb4, nvidia
   0,5% (  1,0)      yum-updatesd : schedule_timeout (process_timeout)
   0,5% (  1,0)        pm-suspend : queue_delayed_work_on (delayed_work_timer_fn)
   0,5% (  1,0)            dhcdbd : schedule_timeout (process_timeout)
   0,5% (  1,0)    cpufreq-applet : schedule_timeout (process_timeout)