In message <FA5C4E2B-D499-4A31-9512-CC726F216DA4@invisible.ca>, "Jared D. McNei
ll" writes:
>On 28-May-06, at 8:59 PM, Tracy Di Marco White wrote:
>
>> I'm going to be spending the next week at a conference, and I know
>> I won't always be able to be near an outlet.  A co-worker running
>> one of those other OSs (his is from Redmond) with the same laptop
>> can get nearly double the time out of his two batteries that I can.
>>
>> What tips do people have for making your battery last as long as
>> possible, when you want to use the computer?
>>
>> I have an atheros wireless card, which I guess I can't do powersave
>> with.  I have radeontools installed for shutting off the backlight,
>> I have estd set up to adjust the CPU frequency down when I'm not on
>> AC. I mount / (my only partition) with noatime, nodevmtime, and soft
>> dependencies.
>>
>> I've got a Latitude D600. I'm running a few days old current.
>
>I have ACPI S3 working on the D600 if you're interested.

I'm interested.  Will all my devices come back up properly with it?

>Apart from that, on my Vaio I do things with powerd such as dimming  
>the screen on battery, slowing down the processor, using atactl  
>setstandby/setidle, shutting off cron, and restarting syslogd to use  
>an alternate config file that doesn't write to any files, only ttyE7.

What is a reasonable setting for atactl setstandby/setidle?

>I use powersave with ral/ural when acadapter is disconnected also; I  
>suspect that this will be a huge drain on your battery if ath doesn't  
>support it. You may also want to ifconfig bge0 down (as Windows does)  
>when using the wireless adapter on battery.

I'll make sure I have my orinoco card along, so I can down the ath0
and have power management with my wireless.

>I'll have to check tomorrow to see if radeontool can dim the display  
>without turning it off completely. I never tried.

Thanks!  I can dim the display by hand with fn-up / fn-down, but
there's no automated control.

-Tracy