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)
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: start_range_ ns (hrtimer_wakeup) start_range_ ns (hrtimer_wakeup) start_range_ ns (tick_sched_timer) start_range_ ns (hrtimer_wakeup) start_range_ ns (hrtimer_wakeup) start_range_ ns (hrtimer_wakeup) timeout_ uninterruptible (process_timeout) 0000:00: 02.0 start_range_ ns (hrtimer_wakeup)
96.1% (43222.2) <interrupt> : extra timer interrupt
2.0% (887.4) pidgin : hrtimer_
0.6% (286.6) firefox : hrtimer_
0.5% (229.4) <kernel core> : hrtimer_
0.3% (115.8) amarok : hrtimer_
0.2% ( 98.6) <interrupt> : HDA Intel
0.0% ( 21.6) gnome-panel : hrtimer_
0.0% ( 21.0) skype : hrtimer_
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_
0.0% ( 5.4) <interrupt> : i915@pci:
0.0% ( 4.2) VBoxSVC : hrtimer_
0.0% ( 3.6) <interrupt> : acpi
0.0% ( 2.4) <kernel core> : hrtimer_start (tick_sched_timer)