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

Dan Sawyer linux-thinkpad@linux-thinkpad.org
Wed, 18 Dec 2002 16:12:55 -0800


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Thank you,

No, the battery is installed.

/proc/cpuinfo shows 170 MHz and 365 bobomips.

(It sure runs cool. The fan is on low speed most all the time.)

Dan

Frank Scott wrote:

>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
>  
>


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Thank you,<br>
<br>
No, the battery is installed. <br>
<br>
/proc/cpuinfo shows 170 MHz and 365 bobomips. <br>
<br>
(It sure runs cool. The fan is on low speed most all the time.)<br>
<br>
Dan<br>
<br>
Frank Scott wrote:<br>
<blockquote type="cite"
 cite="mid20021218221540.GA8653@frasco.demon.co.uk">
  <pre wrap="">On Wed, Dec 18, 2002 at 12:07:19PM -0800, Dan Sawyer wrote:
  </pre>
  <blockquote type="cite">
    <pre wrap="">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:

    </pre>
    <blockquote type="cite">
      <pre wrap="">
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.

      </pre>
    </blockquote>
  </blockquote>
  <pre wrap=""><!----> 
Are you running on AC power with the battery removed?

&gt;From the IBM web site :-

 TP A2x, T2x, 600X - CPU Speed slows down when battery is removed
   Applicable countries/regions
	Worldwide
	  Service hints &amp; 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
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