Re: [Thinkpad] [A31p] Problems with SpeedStep

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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Received on Wed Jan 21 10:10:15 2004