Difference between revisions of "Powertop"

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PowerTOP suggests a few methods to reduce the power consumption further. You can apply these settings at boot by using [[module parameters]], [[udev rules]] and [[sysctl]]. For details, see the [[power saving]] page.
 
PowerTOP suggests a few methods to reduce the power consumption further. You can apply these settings at boot by using [[module parameters]], [[udev rules]] and [[sysctl]]. For details, see the [[power saving]] page.
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== Troubleshooting ==
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=== Error: Cannot load from file ===
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If you get an error like the following when starting powertop, you are likely to have powertop not allowed collecting enough measurement data yet. All you need to do is to keep powertop running for a certain time whilst being on battery.
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Loaded 39 prior measurements
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Cannot load from file /var/cache/powertop/saved_parameters.powertop
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Cannot load from file /var/cache/powertop/saved_parameters.powertop

Revision as of 09:03, 16 June 2013

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PowerTOP is a tool provided by Intel to enable various powersaving modes in userspace, kernel and hardware. It is possible to monitor processes and show which of them are utilizing the CPU and wake it from its Idle-States.

Installation

Install package powertop, available in Official Repositories.

Powertop was updated to 2.0 which comes with more features (Article from the H Open). For more information, see the Release Announcement.

Tips and tricks

PowerTOP suggests a few methods to reduce the power consumption further. You can apply these settings at boot by using module parameters, udev rules and sysctl. For details, see the power saving page.

Troubleshooting

Error: Cannot load from file

If you get an error like the following when starting powertop, you are likely to have powertop not allowed collecting enough measurement data yet. All you need to do is to keep powertop running for a certain time whilst being on battery.

Loaded 39 prior measurements
Cannot load from file /var/cache/powertop/saved_parameters.powertop
Cannot load from file /var/cache/powertop/saved_parameters.powertop