If running sudo powertop -auto-tune from a terminal and re-running sudo powertop, then all the auto-tunable settings correctly show up as Good. So, it looks like the service either fails to run, or errors while running in the service context. I'm not familiar enough with systemd to know what's going on or know where to go spelunking.
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Package information
PowerTOP is a Linux utility that can monitor and display a system's electrical power usage. It is useful as a hardware monitoring and diagnostic tool. It is among the most powerful battery stretching utilities for notebook computers.
InstallationKernel
Several kernel options must be enabled in the kernel for PowerTOP to work properly. These include: CONFIG_DEBUG_FS, CONFIG_TRACING, CONFIG_BLK_DEV_IO_TRACE, CONFIG_TIMER_STATS (was removed in kernel 4.11), CONFIG_CPU_FREQ_STAT, and CONFIG_CPU_FREQ_STAT_DETAILS (removed in 4.11, and rolled into CONFIG_CPU_FREQ_STAT).
Note
CONFIG_TIMER_STATS has been removed from kernel, see https://patchwork.kernel.org/patch/9561519/
For newer Intel Core series of processors (based on the Sandy Bridge microarchitecture or newer) enable the powercap sysfs driver via CONFIG_POWERCAP and CONFIG_INTEL_RAPL.
Optionally, for wireless power saving enable: CONFIG_TRACEPOINTS.
KERNELIntel powercap sysfs driver
If the above options have not properly been enabled Portage will display warning messages at the end of the emerge. If help is required for upgrading the kernel while enabling the above options, be sure to see the kernel upgrade article!
USE flagsUSE flags forsys-power/powertoptool to diagnose issues with power consumption and power management
Data provided by the Gentoo Package Database · Last update: 2020-03-31 16:06 More information about USE flags
Emerge
After setting USE flags, emerge PowerTOP:
Configuration
Opengl package for dev c++. PowerTOP does not have any configuration other than passing options via the command-line.
Calibration
Calibration can be performed in order for PowerTOP to gain an understanding of the system:
UsageInvocationTroubleshootingCould not find a Makefile in the kernel source directory
After an emerge a message similar to the following message may be displayed:
This warning indicates the PowerTOP ebuild has attempted to verify a successful operating environment for the PowerTOP software package. In order to be sure PowerTOP will work as intended, at the end of the emerge process, a check is ran against the current kernel source configuration. In the case of the above message two warnings were provided:
See also
External resources
Retrieved from 'https://wiki.gentoo.org/index.php?title=PowerTOP&oldid=856670'
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, allowing to identify applications with particular high power demands.
Installation
Install the powertop package.
Usage
Powertop suggests a few methods to reduce the power consumption further. However, in interactive mode, powertop does not display the parameters. To find out which ones are suggested, proceed as follows:
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Powertop Auto Tune System Reviews
Apply settings
There are two ways to automatically apply the suggested settings:
TroubleshootingError: Cannot load from file
If you receive an error like the following when starting powertop, it's likely that powertop has not collected enough measurement data yet. To fix this, keep powertop running for a certain time connected to battery power only.
Calibration to prevent inaccurate measurement
If you experience inaccurate measurement, then it is likely that you need to calibrate powertop first. This can be done by running powertop with the
--calibrate parameter.
Note: Calibration will toggle various functions like backlight or wifi. Thus, it may turn your screen black for some time, lose your connection, and so on. Do not touch the machine during the calibration.
See also
Retrieved from 'https://wiki.archlinux.org/index.php?title=Powertop&oldid=604206'
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