[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?
>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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