[ltp] poll: battery life under T43

[Jiang Qian]

Hi Paul:
Thanks for you response. 

I didn't know about wireless power management, but if it reduce the 
power by 2w, it will really help me. At least make me to put back up my 
screen to readable level.

Whoa you seem to get really good powermanagement! What's your hardware 
configuration? Do you have Somona architecture so that your hard drive 
shows up as sda? I worry a bit about using hdparm to tune the 
power hard drive in my case because it is using a passthrough layer in 
kernel that's not enable for default because it is too immature.
How often do your hard drive  enter standby? How fast is your screen?

I read somewhere you don't save too much by going down below 800MHz, 
but I'll try 600. Yeah I also put my governor to conservative. If I 
really try I can put it on always lowest to reduce my laptop to a 
600MHz machine!

Jiang

On Thu, Sep 01, 2005 at 09:25:30AM +0200, Paul RIVIER wrote:
> 
> >What I did to get conserve power: enable dynamic clock xorg, put scaling 
> >governor to conservative(which pretty much keep my computer at 800MHz).  
> > 
> >
> Can't you go to 600Mhz ?
> I use a daemon awith a lazy-to-raise policy, that is really efficient 
> for powersaving and quiet comfortable.
> 
> >I don't use laptop mode because I worry about the repeated spin up and 
> >spin down destroying HD. 
> >
> HDD on -> + 2W
> FAN on -> +1W
> DynamicClock off -> + 2W
> Wifi powermanagement off -> + 2W
> USB-mouse -> +2W
> 
> When idle (I even dont touch the keyboard), using ubuntu hoary & gnome, 
> my laptop stabilize to 10,5W in laptop mode (hdd in standby).
> For a 6-cell wbattery of 42Wh (like mine) It can run exactly 4 hours.
> When in use, average consumption is 12W.
> 
> paul
> 
> 
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