[ltp] poll: battery life under T43

[dillon lawson]

Can you send me a link to the ata patches i have yet to find them.  I 
get about 3.5hours with mine  as well.

--dillon

Jiang Qian wrote:

>Hi All:
>I've been tinkering to get the battery lifetime longer on my laptop and 
>would like to see people's mileage. 
>
>I have a T43(2668W12) with 1.86GHz Dothan, ati X300(M22 chip)  Hitachi  
>7200rpm hard drive and 6cell battery(capacity 51840mWh). I use ubuntu 
>hoary and a kernel 2.6.12.4 and 0.11 of ibm_acpi.  I patched the kernel 
>ata drivers to get suspend to ram working
>
>What I did to get conserve power: enable dynamic clock xorg, put scaling 
>governor to conservative(which pretty much keep my computer at 800MHz).  
>I don't use laptop mode because I worry about the repeated spin up and 
>spin down destroying HD. 
>Now some number. I got 17W(3 hours 3 min) if I put screen to dimmest 
>and turn the fan off. Although I worry turning the fan off what the 
>heat does to battery(with fan on temperature stabilizes around 54C for 
>both CPU and GPU and 44C 38C for battery and 38C for HDD. With fan it 
>does some kind of cycle between 55 and 65C)
>With fan on and screen to brightest I have 20.3W, i.e. 2hour 33 min.
>With fan off and screen to brightest I have 19.8W 2hour 37 min.
>All these are down under gnome and with only light typing, not even web 
>browsing. This is much lower than 4.5 hour as they advertise!
>
>What else I can do to prolong battery time? What kind of number shall I 
>expect? I got some ideas from
>http://www.sas.upenn.edu/~vbraun/computing/T41/power.html
>Although given my computer's more powerful chip should I expect less 
>battery lifetime than he got? Any more optimization I can do?
>Thanks a bunch!
>Jiang
>  
>