I am trying to reduce the power usage of my toshiba tecra a9. After first running powertop and agreeng to all its suggestions, powertop -d gives me on a mostly idle machine
PowerTOP 1.11 (C) 2007, 2008 Intel Corporation Collecting data for 15 seconds Cn Avg residency C0 (cpu running) ( 5.8%) C0 0.0ms ( 0.0%) C1 halt 0.0ms ( 0.0%) C2 0.3ms ( 0.0%) C3 0.1ms ( 0.0%) C4 5.6ms (94.2%) P-states (frequencies) 2.41 Ghz 1.7% 2.40 Ghz 0.0% 2.00 Ghz 0.0% 1.60 Ghz 0.0% 800 Mhz 98.3% Wakeups-from-idle per second : 173.7 interval: 15.0s Power usage (ACPI estimate): 17.3W (2.1 hours) Top causes for wakeups: 19.7% ( 42.5) <interrupt> : PS/2 keyboard/mouse/touchpad 17.4% ( 37.5) <kernel IPI> : Rescheduling interrupts 13.9% ( 29.9) <interrupt> : extra timer interrupt 10.3% ( 22.2) <interrupt> : iwl3945 8.0% ( 17.1) firefox : futex_wait (hrtimer_wakeup) 7.1% ( 15.2) xchat : schedule_hrtimeout_range (hrtimer_wakeup) 5.6% ( 12.0) Xorg : schedule_hrtimeout_range (hrtimer_wakeup) 4.2% ( 9.0) <interrupt> : i...@pci:0000:00:02.0 3.5% ( 7.6) <kernel core> : hrtimer_start (tick_sched_timer) 1.9% ( 4.0) <kernel core> : usb_hcd_poll_rh_status (rh_timer_func) 1.5% ( 3.3) xchat : do_nanosleep (hrtimer_wakeup) 0.9% ( 2.0) ktoshkeyd : schedule_timeout (process_timeout) 0.8% ( 1.8) gnome-terminal : schedule_hrtimeout_range (hrtimer_wakeup) 0.6% ( 1.2) <interrupt> : ahci 0.5% ( 1.0) hald-addon-inpu : queue_delayed_work (delayed_work_timer_fn) 0.4% ( 0.9) compiz.real : schedule_hrtimeout_range (hrtimer_wakeup) 0.4% ( 0.9) Xorg : queue_delayed_work (delayed_work_timer_fn) 0.3% ( 0.7) <kernel core> : neigh_table_init_no_netlink (neigh_periodic_timer) 0.3% ( 0.6) pidgin : schedule_hrtimeout_range (hrtimer_wakeup) 0.3% ( 0.6) <kernel core> : sk_reset_timer (tcp_delack_timer) 0.2% ( 0.5) <interrupt> : eth0 0.2% ( 0.5) <kernel core> : e1000_intr_msi (e1000_watchdog) 0.2% ( 0.5) iwl3945 : ieee80211_authenticate (ieee80211_sta_timer) 0.2% ( 0.4) NetworkManager : schedule_hrtimeout_range (hrtimer_wakeup) 0.2% ( 0.3) gnome-panel : schedule_hrtimeout_range (hrtimer_wakeup) 0.2% ( 0.3) firefox : sk_reset_timer (tcp_write_timer) 0.2% ( 0.3) gnome-screensav : schedule_hrtimeout_range (hrtimer_wakeup) 0.1% ( 0.3) <kernel core> : rs_tx_status (iwl3945_bg_rate_scale_flush) 0.1% ( 0.3) gnome-power-man : schedule_hrtimeout_range (hrtimer_wakeup) 0.1% ( 0.2) update-notifier : schedule_hrtimeout_range (hrtimer_wakeup) 0.1% ( 0.2) firefox : schedule_hrtimeout_range (hrtimer_wakeup) 0.1% ( 0.1) Xorg : hrtimer_start (it_real_fn) 0.1% ( 0.1) pidgin : sk_reset_timer (tcp_write_timer) 0.1% ( 0.1) touch : start_this_handle (commit_timeout) 0.0% ( 0.1) <interrupt> : acpi 0.0% ( 0.1) gnome-terminal : do_nanosleep (hrtimer_wakeup) 0.0% ( 0.1) <kernel core> : __enqueue_rt_entity (sched_rt_period_timer) 0.0% ( 0.1) ksoftirqd/0 : queue_delayed_work (delayed_work_timer_fn) 0.0% ( 0.1) nm-applet : schedule_hrtimeout_range (hrtimer_wakeup) 0.0% ( 0.1) gconfd-2 : blk_plug_device (blk_unplug_timeout) 0.0% ( 0.1) gconfd-2 : schedule_timeout (process_timeout) 0.0% ( 0.1) ssh-agent : schedule_hrtimeout_range (hrtimer_wakeup) 0.0% ( 0.1) <kernel module> : sta_info_start (sta_info_cleanup) 0.0% ( 0.1) <kernel core> : page_writeback_init (wb_timer_fn) 0.0% ( 0.1) syslogd : hrtimer_start (it_real_fn) 0.0% ( 0.1) <kernel core> : queue_delayed_work (delayed_work_timer_fn) 0.0% ( 0.1) hald : schedule_hrtimeout_range (hrtimer_wakeup) 0.0% ( 0.1) <kernel core> : neigh_add_timer (neigh_timer_handler) A USB device is active 100.0% of the time: /sys/bus/usb/devices/6-2 Recent USB suspend statistics Active Device name 100.0% /sys/bus/usb/devices/6-2 0.0% USB device 6-1 : Biometric Coprocessor (STMicroelectronics) 0.0% USB device usb7 : UHCI Host Controller (Linux 2.6.28-13-generic uhci_hcd) 100.0% USB device usb6 : UHCI Host Controller (Linux 2.6.28-13-generic uhci_hcd) 0.0% USB device usb5 : UHCI Host Controller (Linux 2.6.28-13-generic uhci_hcd) 0.0% USB device usb4 : UHCI Host Controller (Linux 2.6.28-13-generic uhci_hcd) 0.0% USB device usb3 : UHCI Host Controller (Linux 2.6.28-13-generic uhci_hcd) 0.0% USB device usb2 : EHCI Host Controller (Linux 2.6.28-13-generic ehci_hcd) 0.0% USB device usb1 : EHCI Host Controller (Linux 2.6.28-13-generic ehci_hcd) The USB device active 100% is Bus 006 Device 002: ID 0483:2016 SGS Thomson Microelectronics Fingerprint Reader Is there any way to turn this off? uname -a Linux clifford-laptop 2.6.28-13-generic #45-Ubuntu SMP Tue Jun 30 19:49:51 UTC 2009 i686 GNU/Linux Raphael P.S. I'd also love to get rid of 17.4% ( 37.5) <kernel IPI> : Rescheduling interrupts 13.9% ( 29.9) <interrupt> : extra timer interrupt if anyone knows how to. _______________________________________________ Power mailing list [email protected] http://www.bughost.org/mailman/listinfo/power
