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Old 12-07-2012, 04:59 AM   #1
Mustafa^Qasim
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Registered: Dec 2005
Location: Lahore, PK
Distribution: Fedora 14
Posts: 105

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Intel Corei Processor Power Management


Hi,

Intel's drivers for Windows does excellent power management for Corei family processors and put un used cores to sleep. It saves a significant amount of battery.

However I do use Ubuntu on my HP ProBook Corei7 and it keeps all the processors active everytime.

I've tried dual booting Windows7/Ubuntu and monitored the performance.

When using Windows with Intel's all drivers installed two things happens

* During normal work load only half or few cores are active and crunching data while others are totally sleeping.

* Optimized usages of cores increases the battery time and it also helps generates less heat as the fan runs after a long period to exhaust the heat.

When I boot into Ubuntu the performance utility shows me that all 8 cores are active are only crunching tiny bits of data. When using Ubuntu the battery time is less then compared to Windows and the fan runs frequently (as I believe running all the cores generates more heat)


Has anyone monitored same issues with Corei family processor laptops?

How I can better manage the processors and optimize their usage?
 
Old 12-07-2012, 05:43 AM   #2
markush
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Registered: Apr 2007
Location: Germany
Distribution: Slackware
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Please open a terminal in Ubuntu and post the output of
Code:
cpufreq-info
Markus
 
  


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