[Bug 373245] Re: karmic: wakeups <kernel core> : hrtimer_start_range_ns (tick_sched_timer)

[soprano]

Same problem here with Karmic, kernel  2.6.31-20-generic. Battery life
decreased to 30% of that in Jaunty (1h to 20 min.).

Top causes for wakeups:
  28.6% ( 44.7)     <kernel core> : hrtimer_start_range_ns (tick_sched_timer) 
  13.6% ( 21.3)       <interrupt> : extra timer interrupt 
   8.1% ( 12.7)       <interrupt> : ehci_hcd:usb2, uhci_hcd:usb3, uhci_hcd:usb5 
   7.9% ( 12.3)           firefox : hrtimer_start_range_ns (hrtimer_wakeup) 
   7.9% ( 12.3)   /sys/bus/usb/devices/2-1.1.1 
   7.0% ( 11.0)     <kernel core> : hrtimer_start (tick_sched_timer) 
   6.8% ( 10.7)      <kernel IPI> : Rescheduling interrupts

-- 
karmic: wakeups  <kernel core> : hrtimer_start_range_ns (tick_sched_timer) 
https://bugs.launchpad.net/bugs/373245
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