PowerTOP 1.12 (C) 2007, 2008 Intel Corporation Collecting data for 15 seconds Cn Avg residency C0 (cpu running) ( 1.0%) polling 0.0ms ( 0.0%) C1 mwait 0.0ms ( 0.0%) C2 mwait 63.7ms (99.0%) C3 mwait 0.0ms ( 0.0%) P-states (frequencies) Turbo Mode 0.0% 2.67 Ghz 0.0% 2.54 Ghz 0.0% 2.40 Ghz 0.0% 1.60 Ghz 100.0% Wakeups-from-idle per second : 15.5 interval: 15.0s no ACPI power usage estimate available Top causes for wakeups: 26.2% ( 16.6) [kernel scheduler] Load balancing tick 18.1% ( 11.5) [extra timer interrupt] 16.4% ( 10.4) [ata_piix, ata_piix] 15.5% ( 9.8) [Rescheduling interrupts] 7.9% ( 5.0) offlineimap 4.5% ( 2.9) [kernel core] hrtimer_start (tick_sched_timer) 3.2% ( 2.0) [kernel core] add_timer_on (clocksource_watchdog) 1.7% ( 1.1) hald-addon-stor 1.6% ( 1.0) ntpd 1.1% ( 0.7) [eth0] 1.1% ( 0.7) devkit-disks-da 0.8% ( 0.5) events/1 0.4% ( 0.3) [kernel core] enqueue_task_rt (sched_rt_period_timer) 0.3% ( 0.2) [kernel core] __mod_timer (dev_watchdog) 0.3% ( 0.2) rtkit-daemon 0.1% ( 0.1) events/2 0.1% ( 0.1) [kernel core] __mod_timer (tcp_delack_timer) 0.1% ( 0.1) sshd 0.1% ( 0.1) [kernel core] __mod_timer (neigh_timer_handler) 0.1% ( 0.1) ssh-agent 0.1% ( 0.1) [kernel core] __mod_timer (cfq_idle_slice_timer) 0.1% ( 0.1) mythbackend 0.1% ( 0.1) NetworkManager 0.1% ( 0.1) rsyslogd 0.1% ( 0.1) [kernel core] __mod_timer (sync_supers_timer_fn) Suggestion: Enable the CONFIG_USB_SUSPEND kernel configuration option. This option will automatically disable UHCI USB when not in use, and may save approximately 1 Watt of power. Recent USB suspend statistics Active Device name Recent audio activity statistics Active Device name Recent SATA AHCI link activity statistics Active Partial Slumber Device name