Comment 1 for bug 370173

I can confirm this issue in a Sony Vaio VGN-NS150J.

Also, battery time has been considerably reduced from Ubuntu 8.10. Powertop output:

Top causes for wakeups:
  96.1% (43222.2) <interrupt> : extra timer interrupt
   2.0% (887.4) pidgin : hrtimer_start_range_ns (hrtimer_wakeup)
   0.6% (286.6) firefox : hrtimer_start_range_ns (hrtimer_wakeup)
   0.5% (229.4) <kernel core> : hrtimer_start_range_ns (tick_sched_timer)
   0.3% (115.8) amarok : hrtimer_start_range_ns (hrtimer_wakeup)
   0.2% ( 98.6) <interrupt> : HDA Intel
   0.0% ( 21.6) gnome-panel : hrtimer_start_range_ns (hrtimer_wakeup)
   0.0% ( 21.0) skype : hrtimer_start_range_ns (hrtimer_wakeup)
   0.0% ( 20.0) <interrupt> : ahci
   0.0% ( 15.2) <interrupt> : iwlagn
   0.0% ( 10.0) async/0 : timer_action (ehci_watchdog)
   0.0% ( 5.6) python : schedule_timeout_uninterruptible (process_timeout)
   0.0% ( 5.4) <interrupt> : i915@pci:0000:00:02.0
   0.0% ( 4.2) VBoxSVC : hrtimer_start_range_ns (hrtimer_wakeup)
   0.0% ( 3.6) <interrupt> : acpi
   0.0% ( 2.4) <kernel core> : hrtimer_start (tick_sched_timer)