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<p></p> <p><b>New page</b></p><div> PowerTOP version 1.9 (C) 2007 Intel Corporation<br /> <br /> Cn Avg residency P-states (frequencies)<br /> C0 (cpu running) (12.0%) 2.11 Ghz 28.2%<br /> C1 0.0ms ( 0.0%) 1.60 Ghz 1.0%<br /> C2 0.2ms ( 0.6%) 1200 Mhz 0.8%<br /> C3 1.6ms (87.3%) 800 Mhz 70.0%<br /> <br /> <br /> Wakeups-from-idle per second : 568.1 interval: 15.0s<br /> <br /> Power usage (ACPI estimate): 16.1W (1.9 hours)<br /> <br /> Top causes for wakeups:<br /> 70.6% (406.2) &lt;interrupt&gt; : PS/2 keyboard/mouse/touchpad <br /> 14.8% ( 85.4) &lt;kernel IPI&gt; : Rescheduling interrupts <br /> 3.6% ( 20.9) Xorg : schedule_timeout (process_timeout) <br /> 2.6% ( 14.8) &lt;interrupt&gt; : iwl3945 <br /> 1.7% ( 9.8) &lt;interrupt&gt; : ata_piix<br /> 1.3% ( 7.6) &lt;interrupt&gt; : ehci_hcd:usb2, uhci_hcd:usb5<br /> 1.2% ( 6.8) gnome-terminal : schedule_timeout (process_timeout)<br /> 1.0% ( 6.0) USB device 2-6 : USB2.0-CRW (Generic)<br /> 0.9% ( 5.0) gnome-system-mo : schedule_timeout (process_timeout)<br /> 0.4% ( 2.4) &lt;interrupt&gt; : acpi<br /> 0.2% ( 1.1) &lt;kernel module&gt; : neigh_table_init_no_netlink (neigh_periodic_timer)<br /> 0.2% ( 1.0) cpufreq-applet : schedule_timeout (process_timeout)<br /> 0.2% ( 0.9) hald-addon-stor : schedule_timeout (process_timeout)<br /> 0.2% ( 0.9) &lt;kernel core&gt; : ehci_work (ehci_watchdog)<br /> 0.1% ( 0.6) &lt;interrupt&gt; : ahci<br /> 0.1% ( 0.5) iwl3945 : ieee80211_sta_work (ieee80211_sta_timer)<br /> <br /> Suggestion: Disable 'hal' from polling your cdrom with: <br /> <br /> hal-disable-polling --device /dev/scd0 <br /> <br /> 'hal' is the component that auto-opens a window if you plug in a CD but disables SATA power saving from kicking in.<br /> <br /> Q - Quit R - Refresh K - kill hald-addon-storage<br /> <br /> <br /> ASUS F9E-2P174<br /> Intel Core 2 Duo T8100 2.1GHz, <br /> 1GB RAM, 120GB HDD, <br /> VGA Intel GMA X3100, <br /> 12.1 inch screen<br /> <br /> [fa9@asus ~]$ uname -a<br /> Linux asus 2.6.25.14-108.fc9.i686 #1 SMP Mon Aug 4 14:08:11 EDT 2008 i686 i686 i386 GNU/Linux<br /> <br /> As Normal, laptop was at '''16v''' something<br /> <br /> ==writeback==<br /> Suggestion: increase the VM dirty writeback time from 4.99 to 15 seconds with:<br /> <br /> echo 1500 &gt; /proc/sys/vm/dirty_writeback_centisecs<br /> <br /> This wakes the disk up less frequenty for background VM activity<br /> <br /> so to reverse this I guess you'd do<br /> <br /> echo 500 &gt; /proc/sys/vm/dirty_writeback_centisec<br /> <br /> '''|Done, no visible change|'''<br /> <br /> ==OpticalDrivePolling==<br /> Suggestion: Disable 'hal' from polling your cdrom with:<br /> <br /> hal-disable-polling --device /dev/scd0<br /> <br /> 'hal' is the component that auto-opens a window if you plug in a CD but disables SATA power saving from kicking in.<br /> <br /> to revert, I assume it will be:<br /> <br /> hal-disable-polling --device /dev/scd0<br /> <br /> '''|Done, not much changes either''', keeps on complaining I should diable but it's done already and reported as such by my system|<br /> <br /> ==Spare some on the HDD==<br /> Suggestion: Enable SATA ALPM link power management via:<br /> <br /> echo min_power &gt; /sys/class/scsi_host/host0/link_power_management_policy<br /> <br /> How to reverese this one??? echo '''max'''_power looks delirious...<br /> <br /> '''|Done anyway, won a full half volt out of it. Cool|'''<br /> <br /> ==End Result==<br /> <br /> Now around '''13.5v''' I am NOT happy with this lappie. 2 hours to 2.5 if lucky hours max.<br /> <br /> powertop says<br /> <br /> Power usage (ACPI estimate): 13.0W (3.0 hours)<br /> [[Category:Linux]] [[Category:Howtos]]</div>

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