SP2: High power consumption after standby

[Christoph Mueller]

Hi all
I got some problems after installing service pack 2. I hope you can
help me with this one:

I have an intel centrino laptop with windows xp professional and
recently installed service pack 2 on it.

Under normal circumstances, the laptop does not get very hot, and does
not turn on the fans.

Now, whenever it wakes up from standby or hibernation, it will get very
hot and run the fans almost constantly, with greatly increased noise
and battery consumption. Only after a reset will the power consumption
be back to normal.

This will happen even if no programs are runnning, and the task manager
reports almost no processor activity, or memory access. No unusual disc
access either.

Using the SpeedswitchXP utility I found out that before standby, the
processor speed will always stay below 600Mhz. After waking up, the
speed will frequently spike to 1396Mhz.
The problem persists with or without SpeedswitchXP runnning.

How can I fix this?

Thanks for any help

 

[Maurice N ~ MVP]

Cross-posting to hardware group. Can someone help Christoph?

I have not heard of this situation before.

 

[V Green]

Stuff like this is often corrected by a BIOS
update for the laptop.

Alternatively, search support.intel.com for
Speed Step info and problem resolution.

SP2 probably overwrote a system .DLL, driver
or something else that Speed Step uses.


http://support.microsoft.com/default.aspx?scid=kb;en-us;290301
Cross-posting to hardware group. Can someone help Christoph?

I have not heard of this situation before.

 

[Maurice N ~ MVP]

Vance,
My thanks for your response.

 

[V Green]

You're welcome, Maurice.

sorry about the Installer link, that got pasted
in by mistake from another post that I was
answering.

-v.

Vance,
My thanks for your response.

 

[Christoph Mueller]

Stuff like this is often corrected by a BIOS
update for the laptop.

Alternatively, search support.intel.com for
Speed Step info and problem resolution.

Thank you Green and Maurice.

Sadly I was unable to solve this problem so far.
I indeed found a newer bios update, but it did not change anything

I found no article on support.intel.com that seemed to fit my problem,
but I tried to make sure all drivers are up-to-date. I also used the
intel inf installer and then went throught each component in the device
manager and clicked "update drivers".

I tried the Intel Processor Frequency ID Utility, which said my
processor was not supported by it and I should instead use the Intel
Processor Identification Utility

Using this, I indeed got different reported speeds before and after
standby.
My Processor is recognized as:
- Intel Pentium M Processor 1400MHz
- with reported Speed 0,95Ghz, 397Mhz Bus, before standby
- with reported Speed 1.40Ghz, 400Mhz Bus, after standby

Is there anything left I could do to pin this problem down?
It really makes working with my notebook difficult.

 

[V Green]

Don't know really where to go from here
except the following:

if it's still under warranty, send it in

if it came with CD's to restore it to "out of the
box" condition, do it and don't apply SP2. If
you're a careful user, you don't need it.