[ltp] Re: Poor Battery life of T40 (2379-D5U)

[Binary Xerroz]

Actually i was using APM and thats where my poor battery life problem was 
comming from...
recently my dsl died so i was left with no internet, so i rebuilt my kernel 
and was messing around with ACPI, well i built the acpi cpufreq module and 
suddenly my battery life jumped!!! apparently the problem was with APM or 
earlier ACPI the processor was aslways in C1 instead of C2 or C3 power 
states, returning to C3 power state gave me a HUGE jump in battery 
life...now the only problem is my wifi doesnt work when processor is in C3 
state... :(

01011000 01100101 01110010 01110010 01101111
01111010 00001101 00001010 01111000 00111000
00110110 00100000 01000001 01110011 01110011
01100101 01101101 01100010 01101100 01100101
01110010 00100000 01000011 01101111 01100100
01100101 01110010 00001101 00001010 01000001
00100000 01011100 00100111 01010000 01110010
01101111 01100110 01100101 01110011 01110011
01101001 01101111 01101110 01100001 01101100
01011100 00100111 00000000 00000000 00000000




>From: edonia <podimeter@hotmail.com>
>Reply-To: linux-thinkpad@linux-thinkpad.org
>To: linux-thinkpad@linux-thinkpad.org
>Subject: [ltp] Re: Poor Battery life of T40 (2379-D5U)
>Date: Tue, 25 May 2004 23:56:08 +0800
>
>Am Mon, 24 May 2004 20:49:21 +0000 schrieb Binary Xerroz:
>
> > i recently bought a Thiinkpad T40 as my first laptop; and all in all im
> > very happy with it. i can do all my developing on it  and i can even 
>play
> > ET for the most part; however, one thing i am dissatisfied, is the 
>battery
> > life the the T40 compared to windows. at full charge windows will give 
>me
> > nearly 5 good hours, however, linux, has a hard time giving me 3! ive 
>done
> > everything i can think of; cpu is throttled to 600mhz, hard disk is on
> > standby, cdrom on standby, etc etc. the only thing really working is the
> > fan (which never seems to want to turn off) and the wifi  card. but even
> > in windows i have the wifi card going so i know that cant be eating 
>nearly
> > 2 hours of battery. a friend of mine has a T40, a slightly older model 
>and
> > he claims nearly 5 hours on linux. so i have no idea why im getting such
> > poor results from linux, i recently just sent the unit back  due to
> > overheating problem and they replaced teh mobo and said battery needed
> > replacing, so i got a brand new one, and i got 30 mins more (to make the
> > 3hours max). I just ordered a 9cell battery and an ultrabay battery to
> > help but i would really like to be able to get something near the 
>windows
> > battery life. any suggestions? Thank you.
> >
> > Linux 2.6.6
> > SpeedFreq
> > hdparm -c0 -d0 -B254 -S4 /dev/hda
> >
> >
> > 01011000 01100101 01110010 01110010 01101111 01111010 00001101 00001010
> > 01111000 00111000 00110110 00100000 01000001 01110011 01110011 01100101
> > 01101101 01100010 01101100 01100101 01110010 00100000 01000011 01101111
> > 01100100 01100101 01110010 00001101 00001010 01000001 00100000 01011100
> > 00100111 01010000 01110010 01101111 01100110 01100101 01110011 01110011
> > 01101001 01101111 01101110 01100001 01101100 01011100 00100111 00000000
> > 00000000 00000000
> >
> > _________________________________________________________________ 
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>
>
>I get about 5 hours on my T40p.
>The poor battery life semms to depend on the hole ACPI supplyment. I guess
>some or most of the hardware does not save what could be saved.
>
>example:
>if you use the madwifi with the thermal and processor module, the card
>will contiuosly reset.
>Or if i use the internal modem, the processor goes up to 1600...
>
>So what i would try in youre case:
>1. Try to use a fixed DSDT Table from http://acpi.sourceforge.net/
>then compare!
>2. Try amp and compare the time
>
>No further ideas. I guess it will take a long time to improve acpi so far,
>for all the hardware out there...
>
>edonia
>
>
>
>--
>The linux-thinkpad mailing list home page is at:
>http://mailman.linux-thinkpad.org/mailman/listinfo/linux-thinkpad

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