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笔记本电脑亮度脚本位于哪里？

tag-icon • tag-icon shortcut-keys scripts laptop brightness backlight
笔记本电脑亮度脚本位于哪里？

在网上我找到了命令：

echo 1 > /sys/class/backlight/acpi_video0/brightness

为了将屏幕亮度设置为最低值，目前我正在整个磁盘中查找该路径，寻找笔记本电脑热键脚本的位置，以便我可以将步长更改为 1（因此按下我的热键只会将亮度改变 1%）。我知道有些人可能会觉得这很慢，但我对夜间屏幕亮度非常挑剔，范围的低端更加明显，因此我希望对其进行精细控制。

答案1

我找不到问题的答案（这很方便），但编写了一个带滑块的 Python GUI。我编写了两个版本，一个使用 wxPython，一个使用 Tk。

这是 tk 版本，更短一些：

import os
import subprocess
from Tkinter import *

class BrightnessSlider(object):
    find_max_brightness_cmd = ['cat', '/sys/class/backlight/intel_backlight/max_brightness']
    find_brightness_cmd = ['cat', '/sys/class/backlight/intel_backlight/actual_brightness']

    def __init__(self, master):
        min_brightness = 92
        p1 = subprocess.Popen(self.find_brightness_cmd,
                              stdout=subprocess.PIPE)
        p2 = subprocess.Popen(self.find_max_brightness_cmd,
                              stdout=subprocess.PIPE)
        current_brightness, stderr = p1.communicate()
        max_brightness, stderr = p2.communicate()

        self.slider = Scale(master,
                  from_=int(min_brightness),
                  to=int(max_brightness),
                  orient=HORIZONTAL,
                  command=self.on_slide)
        self.slider.set(current_brightness)
        self.slider.pack()
        self.slider.focus_set()

    def on_slide(self, new_value):
        self.set_brightness(new_value)

    def set_brightness(self, new_val):
        with open('/sys/class/backlight/intel_backlight/brightness', 'w') as f:
            f.write(new_val)


if __name__ == "__main__":
    master = Tk()
    b = BrightnessSlider(master)
    mainloop()

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