Re: [Thinkpad] [A31p] Problems with SpeedStep

I too have that very same symthoms when I remove the
battery while having my unit plugged into an AC
adapter I noticed that processor speed dropped and
when I inserted my battery back after a couple of
minutes it'll jump back up to maxmimum speed.

I have read it some where on this list that 'newer'
thinkpad need to have battery inserted while connected
to AC adapter in order to get 'all' cpu speed.

Is this still a correct assumption?

--- STeve Andre' <andres@msu.edu> wrote:
> On Wednesday 21 January 2004 09:07 am, Dimitrios
> wrote:
> > Hello everyone. I'm an oldie in the list, though i
> haven't posted
> > anything for over a year, anyway, back to my
> problem...
> >
> > I own an A31p (P4-M 2.0ghz, 1gb ram, 80gb hdd, 15"
> tft, dvdrw, dvdrom),
> > my older thinpads were a T23 and a 600E.
> >
> > Now, when the laptop is powered by the mains and
> the battery is inside
> > the laptop, then performance is at maximum of
> 2.0ghz.
> >
> > But, when i remove the battery (laptop still
> connected to the mains)
> > SpeedStep kicks in and reduces my performance to
> 1.1ghz and then to 750ghz.
> >
> > I've asked around and apparently other people have
> seen the same problem
> > on other thinkpad models.
> >
> >
> > Any help would be appriciated :]
>
> I think things are working as they should. The P4
> is an absolute hogg
> when it comes to power, so when you are off the AC
> power the CPU
> is stepped down in order to conserve power. There
> is a bios setting
> you can do to disable that if you'd like.
>
> I don't know the specifics (I have a 1.8GHz cousin
> of your A31p) but
> the idea of stepping down twice makes sense.
> Possibly different speed
> cpu's slow down at different rates. It's probably
> in the ibm help files, or
> in the specs for the A31p.
>
> So, thats a fature, not a bug. The bug is the P4
> itself.
>
> --STeve Andre'
>
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=====
-nat

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Received on Wed Jan 21 10:34:27 2004