[ltp] buying a new Thinkpad

[Igor V. Rafienko]

on Oct 14, 2006, 14:46, Marius Gedminas wrote:

[ ... ]

>> 	- have a good battery life. my current thinkpad draws way too much
>>        power when in suspend-to-ram - well known problem it seems - ,
>
> A kernel upgrade could fix that.
>
> (Or break it again -- I've upgraded to Ubuntu Edgy, and my laptop started
> consuming about 2--2.5 Watt while suspended.  I'm sure it was under 1 Watt
> when I had Dapper.)


1W is insane for suspend-to-ram! My ThinkPad T43 draws about 255mWh when 
suspended to RAM (2 memory sticks, 1024 + 512MB). There was an unfortunate 
issue with one of the relatively recent kernels where I had to remove 
uhci_hcd before sleeping, but once that has been established, everything 
became peachy.


>>        and battery life is now under 1hour (i have a 2.5 year old R51).
>
> A new battery could fix that ;)


:) That's true, though.


> My T42 has a 6 cell 47510 mWh battery.  It was good for about 3 hours
> of normal use when it was new (with WiFi on, Bluetooth off, CPU
> frequency scaling and laptop-mode enabled -- basically what Ubuntu
> installs by default).


A 9-cell battery (rated at around 77Wh) should be able to hold a while. 
On:

* minimum brightness
* sound off, wifi off, bluetooth off, no network
* powersave governor
* (no laptop mode, though)

... my TP is at about 12.5-12.8W. YMMV.





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