Intel SpeedStep Technology and IBM ThinkPad 600X

Archived from groups: comp.sys.laptops (More info?)

hi there,

i was wondering if anyone has a solution to the problem:

in my 2645-5FU is a 650MHz mobile pentium III with speedstep enabled,
and in battery optimized mode it goes down to 500MHz. so far so good.

when i boot with ac-adapter and _no_ battery inside it always runs at 500MHz,
when it's supposed to run at 650MHz full speed, impossible to change in
windows (w2k), the maximum performance mode is greyed out.

only with battery inside it is possible to change between the battery
optimized mode (500 MHz) and maximum performance mode (650 MHz), no
matter if ac-adapter is connected or not - always.

so, wtf is it not running 650 MHz without battery when it has all the
current in the world from the ac-adapter to do so.

is the bios buggy?
is it a feature?

(using intel speedstep utility 1.10 from ibm website)

thanks

tpd.