[ltp] Power saving on my T41p

[Patrick Huber]

Hi

To turn the wlan off I have to load and unload the modules twice after a 
reboot. After this initial cycles, a normal load and unload will do. I have a 
small script to do this for me.

Also make sure you have the cpu governors compiled in the kernel and loaded. 
Then select either ondemand or conservative. Ondemand jumps to 100% power as 
soon as its necessary and goes slowly down again. Conservative steps slow in 
both directions.

cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_available_governors
echo "ondemand" > /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor

regards,
Patrick



--- start /root/bin/reload-wlan-modules.sh ---
#!/bin/bash

rmmodules() {
        rmmod ath_pci
        rmmod ath_rate_onoe
        rmmod ath_hal
        rmmod ath_rate_amrr
        rmmod wlan_wep
        rmmod wlan
}

mpmodules() {
        modprobe wlan
        modprobe wlan_wep
        modprobe ath_hal
        modprobe ath_rate_onoe
        modprobe ath_rate_amrr
        modprobe ath_pci
}

case $1 in
        "start")
                mpmodules
        ;;
        "stop")
                rmmodules
        ;;
        "restart")
                rmmodules
                mpmodules
        ;;
        *)
                echo "usage: start, stop, restart"
        ;;
esac
--- end /root/bin/reload-wlan-modules.sh ---


Am Donnerstag, 11. August 2005 06.16 schrieb Cameron McCormack:
> Hey everyone.
>
> I've got a long flight on Saturday (MEL to LHR, 23 hours!) and I
> recently bought a new battery for my T41p so I can get some good usage
> out of it.  This new battery (which isn't a genuine IBM one, this is
> from www.global-batteries.com.au) is a 9-cell one.  I've just charged it
> up and running 'acpi' estimates that it lasts about 3.5 hours at full
> LCD brightness.
>
> I have the Atheros mini-PCI WiFi card in the machine, but I'm not sure
> if it is power up or not.  I don't have the ath_pci.ko module loaded,
> but the WiFi LED is lit up.  I want to make sure that it actually isn't
> powered so that I'm not just wasting power.
>
> Along with turning the Bluetooth off, turning down the LCD brightness
> and getting the two hard disks I have in it powered down, does anyone
> have any other tips for power conversation?
>
> Thanks,
>
> Cameron
>
> --
>   e-mail : cam (at) mcc.id.au    	icq : 26955922
>      web : http://mcc.id.au/	        msn : cam-msn (at) aka.mcc.id.au
>   office : +61399055779		     jabber : heycam (at) jabber.org