[ltp] ibm r40 2722 cpu cooler running even when idle and battery runtime

[Neil Weisenfeld]

Not sure if it's related, but when looking at a friend's T40p under
Windows XP, I noticed that one of the control panels stated that it was
in a really low speed setting while idle -- either 122 MHz or 200 MHz. 
I forget which. 

In any case, Linux now refuses to go below 600 MHz because that's the
officially documented lower limit.

This may be part of the discrepancy.


Neil



On Fri, 2003-11-21 at 21:02, flokno wrote:
> hello all!
> 
> i own an ibm r40 2722, pentium m 1.5 ghz.
> 
> kernel=2.4.22-ac4 with enhanced speedstep and apm enabled. acpi still
> seems broken. i also use cpudynd as a userspace daemon.
> 
> when i let the computer switched on for a longer time (maybe 10 minutes)
> the cpu cooler starts to blow about every 5 minutes for 40 seconds even
> though the cpu is at 600mhz then.
> 
> the behaviour is the same when on battery or on a/c.
> but when using windows xp the cpu is quite all the time when idle.
> 
> what can i do to keep my cpu fan quite under linux too?
> 
> another point is that my runtime on battery is only 3:10 hours compared
> to 5:something hours when in windows.
> so it doesn't seem that the cpu is completely speed stepped down. (or
> voltage is lowered?)
> i also want to have these 5 hours under linux...
> the two problems seem to be dependend somehow.
> 
> maybe somebody knows any hints for my problems with this particular
> laptop!
> 
> thanks in advance, 
>  flo
>