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Latitude E6400 with Windows 7 X64 SP1 The speed of processor 1 in group 0 is being limited by system firmware. Kernel-Processor-Power event id37

Posted on 2011-09-02
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Hello,
I'm using a Latitude E6400  with Windows 7 X64 SP1 fully patched hardware and os with "latest" bios driver updates

During normal working hours ( especially when i'm on video conf call with skype or live messenger but not only)  the system hung and the only solution is power off the client.

On system event there is :

The speed of processor 1 in group 0 is being limited by system firmware. Kernel-Processor-Power  Event id 37

Any suggestion idea about ?

Thanks in advance
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Question by:prointech
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by:Steve Gould
ID: 36475138
I think your problem here is to do with overheating. The speed of your CPU is being throttled down because it is getting too hot. But then the system can't cool itself fast enough and just hangs. This is an odd problem that occurs with laptops, normally when they've been used on the bed and on the floor near carpets and the heat sinks just build up fluff and don't work as efficiently anymore. I would take a good look at clearance on your vents and make sure there aren't any obvious blockages. It may be worthwhile seeing if you can get the machine blown out with compressed air (the computer equipment friendly type of course).
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by:ded9
ID: 36475235
Upload the .dmp file...location windows\minidump...zip the minidump folder and upload it.



Ded9.
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by:TraJohnson
ID: 36475743
We have number of E6400's and see that error fairly often, I 2nd stevegould.  The laptop is overheating and the CPU throttles down to around 800Mhz while it cools off.  If you are like the users here when that happens the laptop is almost useless until it goes back to normal.  Its a dual core machine so there will probably be two of those messages back to back in the system log.

What I do is take the back off the laptop and use a good strong can of air to blow out the cooling fan, vents, and heat pipe fins.  That might be all that you need.  That didn't fix a couple of our units and when I pulled the heatsink off I found that the thermal paste on the CPU or video chip was off center or missing completely.  Fixing that or putting a fresh coat on the chips helps a lot too.

Also make sure you are on the latest bios, sometimes the later BIOS revisions handle heat issues better.  Good luck!
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Expert Comment

by:nobus
ID: 36477205
you can install speedfan to monitor the temperatures : http://www.almico.com/speedfan.php

for cleaning a laptop - it is best to open it  to remove the dust, since blowing into it may concentrate the dust in the insides
you can also remove the cpu heatsink, and renew the heatpaste
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prointech earned 0 total points
ID: 36556186
Hi,
thanks for your feedback.
I have solved by update  the nvidia graphic card
Thanks

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Author Closing Comment

by:prointech
ID: 36585498
I have solved by update  the nvidia graphic card
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