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How to judge whether the power mode is successfully switched?

Anonymous
2024-05-06T06:52:41+00:00

When switch power mode in Settings -> System -> Power& battery, how to judge whether the power mode is successfully switched? best performance/

I followed below link and tried powercfg and ETW, but no helpful information was found.

https://learn.microsoft.com/en-us/windows-hardware/customize/desktop/customize-power-slider

I want to know:

a. Is there any status value that indicates the current power mode?

b. Is there any method to trace the mode mode status ?

Windows for home | Windows 11 | Settings

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  1. Anonymous
    2024-05-13T03:22:38+00:00

    Thank you for your reply. As far as I know, the “powercfg” you mentioned displays the power plan set in the Control Panel (Control Panel - Power Options). At present, I have not found any information in my known database about the status corresponding to the power mode in UWP settings.

    Best Energy Efficiency: This mode is suitable for long-term use of battery power, such as using a laptop in a place without a power socket. This mode will limit the performance of the computer to extend the battery life. This means that the speed of the computer may slow down, but it can use the battery power more effectively.

    Balanced : This mode is suitable for general daily use, such as using a laptop in an office or home environment with a power socket. This mode will balance between performance and energy efficiency to provide a better user experience and battery life.

    Best Performance: This mode is suitable for tasks that require high performance, such as gaming, video editing, or other work that requires a lot of computing resources. In this mode, all the hardware of the computer will perform at its best, the graphics card and CPU will perform at their maximum computing power, and the system will perform excellently.

    These three modes are all power management schemes, and each power management scheme corresponds to a uuid. The configuration of the power mode is hidden from the user, and it is generally believed that it is okay to use the configuration in the power plan directly. However, if the configuration set by yourself also exists in the power plan, it cannot take effect because it is overridden.

    Since Microsoft’s official has not yet provided a detailed explanation of this feature, the above content is just my personal understanding. If you still have doubts about this, It is more suitable for publishing on Windows 11 - Microsoft Q&A (English only), you can click on "Ask a question", there are experts who can provide more professional solutions in that place. 

    Best Regards

    Leo Z | Microsoft Community Support Specialist

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  1. Anonymous
    2024-05-11T07:00:40+00:00

    Hi Leo.Z,

    I haven't seen any Spec from Microsoft describing this part in detail.

    Since the CPU frequency changes dynamically, it cannot be used to accurately determine whether the switching has actually occurred. Moreover, there is no detailed explanation of the impact of different power-saving modes on frequency.

    Image

    So I would like to know if there is any status bit information/msr/tools or someting else that can confirm the switch is actually successful.

    Thanks!

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  2. Anonymous
    2024-05-07T07:29:58+00:00

    lin qi Hi,

    Welcome to Microsoft Community

    I understand your question. Power plans and energy-saving modes are two different concepts. Based on your description, you might be asking about the functionality of energy-saving mode.

    Energy-saving mode is primarily used to enable or disable specific system features to reduce power consumption. It does not change your power plan but operates based on the current power plan. Energy-saving mode typically reduces CPU performance and lowers display brightness to extend battery life.

    In high-performance mode, enabling this mode may not be directly associated with a specific setting. However, you can observe the effects by checking screen brightness and monitoring CPU speed changes in the “Performance” screen of the Task Manager (when enabled, the frequency will decrease to some extent).

    Best Wish

    Leo Z| Microsoft Community Support Specialist

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