On 02/27/10 16:10, Konnor Jean wrote: > I applied almost all the powersaving tricks and tips from lesswatts.org > and still on total idle with the screen dimmed to maximum, my laptop is > draining over 72 Watts. Here is what's PowerTop is saying: > > ------------------------------------------------------------------------------------------------------------------------------ > < Detailed C-state information is not P-states (frequencies) > 1.60 Ghz 0.0% > 800 Mhz 100.0% > > > Wakeups-from-idle per second : 451.1 interval: 10.0s > Power usage (5 minute ACPI estimate) : 72.5 W (0.3 hours left) > > Top causes for wakeups: > 45.3% (407.4)<kernel IPI> : Rescheduling interrupts > 29.9% (269.2)<kernel core> : hrtimer_start_range_ns (tick_sched_timer) > 7.2% ( 65.1)<interrupt> : extra timer interrupt > 5.6% ( 50.0) touchfreeze : hrtimer_start_range_ns > (hrtimer_wakeup) > 5.3% ( 48.1)<interrupt> : ath > 1.9% ( 17.4) thunderbird-bin : hrtimer_start_range_ns > (hrtimer_wakeup) > 1.0% ( 9.1)<interrupt> : nvidia > 0.6% ( 5.8) cairo-dock : hrtimer_start_range_ns (hrtimer_wakeup) > 0.6% ( 5.0)<kernel core> : hrtimer_start (tick_sched_timer) > 0.3% ( 3.0) rainlendar2 : hrtimer_start_range_ns (hrtimer_wakeup) > 0.3% ( 2.6)<kernel IPI> : TLB shootdowns > 0.2% ( 2.0)<interrupt> : sata_nv > 0.2% ( 2.0) thunderbird-bin : sk_reset_timer (tcp_write_timer) > 0.2% ( 2.0) emerald : hrtimer_start_range_ns (hrtimer_wakeup) > 0.2% ( 1.7) gnome-terminal : hrtimer_start_range_ns (hrtimer_wakeup) > 0.1% ( 1.3)<kernel core> : sk_reset_timer (tcp_delack_timer) > 0.1% ( 1.1) checkgmail : hrtimer_start_range_ns (hrtimer_wakeup) > 0.1% ( 1.0) cpupowerd : hrtimer_start_range_ns (hrtimer_wakeup) > 0.1% ( 1.0)<kernel core> : nv_kern_rc_timer (nv_kern_rc_timer) > 0.1% ( 0.7) gam_server : hrtimer_start_range_ns (hrtimer_wakeup) > ------------------------------------------------------------------------------------------------------------------------------ > > If I surf the web or listen to music, wakeups go haywire reaching 2500+ > Please, help me with that as I am getting barely 15 minutes of battery > life while in windows it is well over an hour.
only an hour of battery life ? wow :) what kind of hardware are we actually talking about? 70W is crazy for a laptop. looking at the above numbers, you're still nowhere near absolute idle. I'd almost suggest booting into init S once and running powertop at that time (in the console as root). Try and see what you get without any X application running. take a look at /proc/interrupts (watch -d cat /proc/interrupts) and see if some of your hardware is causing excessive interrupts. as for the 70+ watt number, that's most likely not due to the software but rather likely due to a kernel driver leaving some hardware device (graphics?) on at full power (compositing enabled?) or even dead hardware. does your laptop get really hot? a spinning fan can up the power envelope by lots of watts as well, throwing you in a viscious circle... Auke _______________________________________________ Power mailing list [email protected] http://www.bughost.org/mailman/listinfo/power
