如何获取笔记本显示屏亮度？WinAPI调用遇I2C总线错误

我目前使用以下代码尝试获取显示屏亮度：

#include <iostream>
#include <Windows.h>
#include <physicalmonitorenumerationapi.h>
#include <highlevelmonitorconfigurationapi.h>

int main()
{
    HMONITOR monitor = MonitorFromWindow(NULL, MONITOR_DEFAULTTONEAREST);
    DWORD numPhysicalMonitors;
    if (!GetNumberOfPhysicalMonitorsFromHMONITOR(monitor, &numPhysicalMonitors))
    {
        std::cerr << "Failed to get the number of physical monitors.\n";
        return 1;
    }

    PHYSICAL_MONITOR* physicalMonitors = new PHYSICAL_MONITOR[numPhysicalMonitors];
    if (!GetPhysicalMonitorsFromHMONITOR(monitor, numPhysicalMonitors, physicalMonitors))
    {
        std::cerr << "Failed to get physical monitors.\n";
        delete[] physicalMonitors;
        return 1;
    }

    for (DWORD i = 0; i < numPhysicalMonitors; i++)
    {
        DWORD minimumBrightness, currentBrightness, maximumBrightness;
        if (!GetMonitorBrightness(physicalMonitors[i].hPhysicalMonitor, &minimumBrightness, &currentBrightness, &maximumBrightness))
        {
            std::cerr << "Failed to get monitor brightness.\n";
            delete[] physicalMonitors;
            return 1;
        }

        std::cout << "Monitor " << i + 1 << ":\n"
            << "Minimum Brightness: " << minimumBrightness << "\n"
            << "Current Brightness: " << currentBrightness << "\n"
            << "Maximum Brightness: " << maximumBrightness << "\n";
    }

    delete[] physicalMonitors;
    return 0;
}

我对WinAPI完全不了解，这段代码是通过在微软文档网站搜索“Brightness”并跳转至相关函数后拼凑而成的。

设备与系统信息 #

• 联想笔记本，搭载AMD芯片、NVIDIA独立显卡
• 系统版本：Windows 11
• 显示模式：曾设置为“仅NVIDIA GPU”，切换回Optimus模式问题依旧

遇到的问题 #

• 代码无法正常调用亮度获取功能，错误信息翻译为“向I2C总线上的设备传输数据时发生错误”
• “仅NVIDIA GPU”模式下系统亮度调节栏呈灰色，Optimus模式下显示正常；但两种模式下都能通过Fn+F5/6功能键调节显示屏亮度

编译环境 #

• Visual Studio 2022社区版，采用C++最新标准、x64平台Debug配置
• 已链接user32.lib、gdi32.lib、dxva2.lib库，Windows SDK版本为10.0

希望能获取相关解决信息或WinAPI相关文档内容，感谢帮助。

内容的提问来源于stack exchange，提问作者PhanLong