Dear list,
I am owning an ASUS Eee PC 701 4G. Debian Sid is installed. $ uname -a Linux uinonah 2.6.26-1-686 #1 SMP Sat Nov 8 19:00:26 UTC 2008 i686 GNU/Linux The LVDS is turned off via $ xrandr --output LVDS --off I am logged in over ssh and LXDE [1] is running I logged in before turning off the LVDS. $ LANG=C sudo powertop --dump PowerTOP 1.10 (C) 2007, 2008 Intel Corporation Collecting data for 15 seconds Cn Avg residency C0 (cpu running) ( 0.7%) polling 0.0ms ( 0.0%) C1 0.0ms ( 0.0%) C2 1.7ms ( 0.1%) C3 61.2ms (99.2%) P-states (frequencies) Wakeups-from-idle per second : 16.8 interval: 15.0s no ACPI power usage estimate available Top causes for wakeups: 33.9% ( 7.5) <interrupt> : uhci_hcd:usb1, ehci_hcd:usb5 21.2% ( 4.7) USB device 5-5 : UB6225 (ENE) 6.1% ( 1.3) lxpanel : schedule_timeout (process_timeout) 4.5% ( 1.0) dhcdbd : schedule_timeout (process_timeout) 4.5% ( 1.0) ntpd : do_setitimer (it_real_fn) 4.5% ( 1.0) Xorg : schedule_timeout (process_timeout) 4.2% ( 0.9) udevd : ehci_work (ehci_watchdog) 2.4% ( 0.5) <kernel module> : neigh_table_init_no_netlink (neigh_periodic_timer) 2.4% ( 0.5) <kernel core> : schedule_delayed_work_on (delayed_work_timer_fn) 2.1% ( 0.5) hald-addon-stor : schedule_timeout (process_timeout) 1.8% ( 0.4) kacpid : schedule_timeout (process_timeout) 1.2% ( 0.3) <interrupt> : acpi 1.2% ( 0.3) <interrupt> : eth0 1.2% ( 0.3) gam_server : schedule_timeout (process_timeout) 1.2% ( 0.3) ifconfig : atl2_open (atl2_watchdog) 1.2% ( 0.3) <kernel core> : neigh_table_init_no_netlink (neigh_periodic_timer) 0.9% ( 0.2) <interrupt> : ata_piix 0.9% ( 0.2) <kernel core> : page_writeback_init (wb_timer_fn) 0.9% ( 0.2) events/0 : __netdev_watchdog_up (dev_watchdog) 0.6% ( 0.1) init : schedule_timeout (process_timeout) 0.6% ( 0.1) ntpd : do_adjtimex (sync_cmos_clock) 0.3% ( 0.1) <kernel core> : sk_reset_timer (tcp_delack_timer) 0.3% ( 0.1) sshd : sk_reset_timer (tcp_write_timer) 0.3% ( 0.1) <kernel core> : addrconf_verify (addrconf_verify) 0.3% ( 0.1) ssh-agent : schedule_timeout (process_timeout) 0.3% ( 0.1) touch : start_this_handle (commit_timeout) 0.3% ( 0.1) <kernel module> : acpi_thermal_check (acpi_thermal_run) 0.3% ( 0.1) screen : do_setitimer (it_real_fn) A USB device is active 100.0% of the time: USB device 5-5 : UB6225 (ENE) Suggestion: increase the VM dirty writeback time from 5.00 to 15 seconds with: echo 1500 > /proc/sys/vm/dirty_writeback_centisecs This wakes the disk up less frequenty for background VM activity Suggestion: Disable 'hal' from polling your cdrom with: hal-disable-polling --device /dev/cdrom 'hal' is the component that auto-opens a window if you plug in a CD but disables SATA power saving from kicking in. Recent USB suspend statistics Active Device name 100.0% USB device 5-5 : UB6225 (ENE) 100.0% USB device usb5 : EHCI Host Controller (Linux 2.6.26-1-686 ehci_hcd) 0.0% USB device usb4 : UHCI Host Controller (Linux 2.6.26-1-686 uhci_hcd) 0.0% USB device usb3 : UHCI Host Controller (Linux 2.6.26-1-686 uhci_hcd) 0.0% USB device usb2 : UHCI Host Controller (Linux 2.6.26-1-686 uhci_hcd) 0.0% USB device usb1 : UHCI Host Controller (Linux 2.6.26-1-686 uhci_hcd) 1. Hmm, I do not know why the output no ACPI power usage estimate available. It was shown before dumping. It was between 0,1 and 0,4 Watts. Running PowerTOP it is also not shown. Strange … 2. Otherwise the USB device, lxpanel and ntpd are causing a lot of wakeups. Do you know of any fixes? I enabled USB autosuspend hitting u, but did not restart anything yet. 3. Are the two suggestions (VM dirty writeback and hal-disable-polling) also useful for the Eee PC? It has a SSD and no CD drive. Thanks, Paul [1] http://www.lxde.org/
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