[ltp] buying a new Thinkpad

[Igor V. Rafienko]

on Oct 17, 2006, 10:49, Michael Kamper wrote:

[ ... ]

>> 1W is insane for suspend-to-ram! My ThinkPad T43 draws about 255mWh
>> when suspended to RAM (2 memory sticks, 1024 + 512MB).
>
> That sounds amazing, I never got fewer than about 1W on my Thinkpad
> X31. (except for windows...) Do you have ati-graphics?


Yes, and I am using fglrx. Just to underline, this is suspend to ram power 
draw, not regular usage :)

An obvious (?) place to check is to see which state your CPU is in. With 
uhci_hcd loaded, I had a few issues there, but with it removed in sus2ram, 
all is well.

I'd be happy to share my configs, if that is of any interest.


> Anybody else achieved so few power consumption on his X31 in 
> suspend-to-ram? 255mW would make suspend-to-disk really obsolete.


Not really. With my battery 255mW is typically "one week without power 
while suspended." Longer off-the-power-grid times require sus2disk :)

The power drain is measured through tp_smapi (in its simplest form, read 
the battery capacity, take the time and suspend. Upon wakeup, read the 
battery capacity, take the time and calculate the result).





ivr
-- 
First rule of optimization: "Don't do it."
Second rule (for experts only): "Don't do it yet."