Same problem here, Sony VAIO laptop with Intel Core II Duo, NVIDIA graphics (so this isn't Intel graphics related).
I'm lucky to get 45 minutes battery life, compared to 3 hours under Windows. Top causes for wakeups: 21.5% ( 63.2) <kernel IPI> : Rescheduling interrupts 21.0% ( 61.7) <kernel core> : hrtimer_start_range_ns (tick_sched_timer) 20.6% ( 60.6) <interrupt> : nvidia 10.2% ( 30.1) firefox : hrtimer_start_range_ns (hrtimer_wakeup) 5.8% ( 17.1) <interrupt> : extra timer interrupt 4.3% ( 12.7) <interrupt> : ehci_hcd:usb2, uhci_hcd:usb5 4.3% ( 12.7) USB device 5-2 : Optical Mouse ( KYE ) (This was taken when running under mains power. Under battery power it is similar except nvidia drops off the list, so I doubt this is graphics card related at all). uname -a Linux hoss 2.6.31-18-generic #55-Ubuntu SMP Fri Jan 8 14:55:26 UTC 2010 i686 GNU/Linux This is a serious problem. Battery life of 1/4 that under Windows is not acceptable. -- karmic: wakeups <kernel core> : hrtimer_start_range_ns (tick_sched_timer) https://bugs.launchpad.net/bugs/373245 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
