[ltp] 600x cpu speed ?? - no on AC power

[Frank Scott]

On Wed, Dec 18, 2002 at 12:07:19PM -0800, Dan Sawyer wrote:
> All,
> 
> Thank you. No boot is under AC power. I do not see how to change it 
> under tpctl. I may have to try ps2.
> 
> 
> Robert Hollis wrote:
> 
> >
> >
> >Yes, primarily because the CPU if booted off battery immediately goes into
> >power saving mode.  ps2.exe may allow this to be changed (or tpctl from
> >sourceforge) but I'm not sure.
> >
 
Are you running on AC power with the battery removed?

>From the IBM web site :-

 TP A2x, T2x, 600X - CPU Speed slows down when battery is removed
   Applicable countries/regions
	Worldwide
	  Service hints & tips
	  Symptom
	  ThinkPad A2x, T2x, 600X with Intel Speed Step microprocessor will
	  slow down to Battery Optimized speed when the battery is removed
	  from the machine.

	  Affected configurations
	  ThinkPad A20, A21, A22, T20, T21, T22, and 600X models with Intel
	  Speed Step microprocessor.

	  Solution
	  This is working as designed. Please have the battery inserted to
	  run the CPU at full speed.

	  Additional information
	  When operating at highest CPU speed and with high current usage
	  peripherals attached (CardBus cards, USB devices, etc.), the
	  required operating current may momentarily exceed the capability of
	  the AC Adapter. When the battery is installed, the battery can
	  supplement the power during the momentary peaks.

	  When the battery is removed from the ThinkPad computer, it switches
	  to "Battery Optimized" speed (lower speed) to reduce peak power
	  demands and to prevent the possibility of input voltage dropping
	  too low, causing the ThinkPad computer to power off.

	  Document id:  MIGR-4R4SC9
	  Last modified:  2001-07-06
	  Copyright © 2002 IBM Corporation

HTH
   Frank