主页 / ubuntu / 问题 / 992699
Accepted
umpirsky
Asked: 2018-01-06 10:10:51 +0800 CST

空闲/活动时运行命令

  • 772

我需要在以下情况下运行自定义命令：

  1. 计算机空闲 X 分钟（未按下任何键）
  2. 按键

我实际上想要实现的是我的键盘的省电功能。

我想使用：

g413-led -a 000000
g413-led -a FFFFFF

使用https://github.com/MatMoul/g810-led打开/关闭键盘背光。

第一个相当容易使用以下之一：

  • 西德勒
  • xprintidle
  • 自动锁定

如果有更好，更优化的方法，请指教？

但是如何在按键或从空闲状态恢复时再次点亮它？我猜在每个按键上运行命令都过大了。是否有节电选项的事件？显示器节能是如何工作的？

在此处输入图像描述

我可以重复使用相同的事件/超时吗？

gnome

2 个回答

  1. Best Answer

    我想出的解决方案是 DBUS 事件。

    我首先运行dbus-monitor以查看当监视器从睡眠中进入/唤醒时会触发哪些事件：

    signal time=1515274499.244468 sender=org.freedesktop.DBus -> destination=:1.394 serial=2 path=/org/freedesktop/DBus; interface=org.freedesktop.DBus; member=NameAcquired
string ":1.394"
signal time=1515274499.244502 sender=org.freedesktop.DBus -> destination=:1.394 serial=4 path=/org/freedesktop/DBus; interface=org.freedesktop.DBus; member=NameLost
string ":1.394"
signal time=1515274559.337480 sender=:1.6 -> destination=:1.2 serial=29015 path=/org/gnome/Mutter/IdleMonitor/Core; interface=org.gnome.Mutter.IdleMonitor; member=WatchFired
uint32 440
signal time=1515274559.337878 sender=:1.2 -> destination=(null destination) serial=3288 path=/org/gnome/SessionManager/Presence; interface=org.gnome.SessionManager.Presence; member=StatusChanged
uint32 3
signal time=1515274559.338267 sender=:1.2 -> destination=(null destination) serial=3290 path=/org/gnome/SessionManager/Presence; interface=org.freedesktop.DBus.Properties; member=PropertiesChanged
string "org.gnome.SessionManager.Presence"
array [
dict entry(
string "status"
variant uint32 3
)
]
array [
]
signal time=1515274569.389778 sender=:1.6 -> destination=(null destination) serial=29018 path=/org/gnome/Shell; interface=org.gnome.Shell.Extensions; member=ExtensionStatusChanged
string "[email protected]"
int32 2
string ""
signal time=1515274569.398929 sender=:1.6 -> destination=(null destination) serial=29019 path=/org/gnome/Shell; interface=org.gnome.Shell.Extensions; member=ExtensionStatusChanged
string "[email protected]"
int32 2
string ""
signal time=1515274569.399633 sender=org.freedesktop.DBus -> destination=:1.6 serial=5195 path=/org/freedesktop/DBus; interface=org.freedesktop.DBus; member=NameLost
string "org.kde.StatusNotifierWatcher"
signal time=1515274569.399660 sender=org.freedesktop.DBus -> destination=(null destination) serial=850 path=/org/freedesktop/DBus; interface=org.freedesktop.DBus; member=NameOwnerChanged
string "org.kde.StatusNotifierWatcher"
string ":1.6"
string ""
signal time=1515274569.404274 sender=:1.6 -> destination=(null destination) serial=29022 path=/org/gnome/Shell; interface=org.gnome.Shell.Extensions; member=ExtensionStatusChanged
string "[email protected]"
int32 2
string ""
signal time=1515274569.442137 sender=:1.6 -> destination=(null destination) serial=29025 path=/org/gnome/Shell; interface=org.gnome.Shell.Extensions; member=ExtensionStatusChanged
string "[email protected]"
int32 2
string ""
signal time=1515274569.455035 sender=:1.6 -> destination=(null destination) serial=29027 path=/org/gnome/ScreenSaver; interface=org.gnome.ScreenSaver; member=ActiveChanged
boolean true
signal time=1515274569.657300 sender=:1.6 -> destination=:1.42 serial=29037 path=/org/gnome/Mutter/IdleMonitor/Core; interface=org.gnome.Mutter.IdleMonitor; member=WatchFired
uint32 491
signal time=1515274569.657404 sender=:1.6 -> destination=(null destination) serial=29038 path=/org/gnome/Mutter/DisplayConfig; interface=org.freedesktop.DBus.Properties; member=PropertiesChanged
string "org.gnome.Mutter.DisplayConfig"
array [
dict entry(
string "PowerSaveMode"
variant int32 3
)
]
array [
]
signal time=1515276608.243100 sender=:1.6 -> destination=:1.2 serial=29039 path=/org/gnome/Mutter/IdleMonitor/Core; interface=org.gnome.Mutter.IdleMonitor; member=WatchFired
uint32 489
signal time=1515276608.243573 sender=:1.2 -> destination=(null destination) serial=3291 path=/org/gnome/SessionManager/Presence; interface=org.gnome.SessionManager.Presence; member=StatusChanged
uint32 0
signal time=1515276608.243843 sender=:1.2 -> destination=(null destination) serial=3292 path=/org/gnome/SessionManager/Presence; interface=org.freedesktop.DBus.Properties; member=PropertiesChanged
string "org.gnome.SessionManager.Presence"
array [
dict entry(
string "status"
variant uint32 0
)
]
array [
]
signal time=1515276608.244032 sender=:1.6 -> destination=:1.42 serial=29040 path=/org/gnome/Mutter/IdleMonitor/Core; interface=org.gnome.Mutter.IdleMonitor; member=WatchFired
uint32 494
signal time=1515276608.270459 sender=:1.6 -> destination=(null destination) serial=29042 path=/org/gnome/Mutter/DisplayConfig; interface=org.freedesktop.DBus.Properties; member=PropertiesChanged
string "org.gnome.Mutter.DisplayConfig"
array [
dict entry(
string "PowerSaveMode"
variant int32 0
)
]
array [
]
signal time=1515276623.523917 sender=:1.6 -> destination=:1.42 serial=29043 path=/org/gnome/Mutter/IdleMonitor/Core; interface=org.gnome.Mutter.IdleMonitor; member=WatchFired
uint32 491
signal time=1515276623.554451 sender=:1.6 -> destination=(null destination) serial=29047 path=/org/gnome/Mutter/DisplayConfig; interface=org.freedesktop.DBus.Properties; member=PropertiesChanged
string "org.gnome.Mutter.DisplayConfig"
array [
dict entry(
string "PowerSaveMode"
variant int32 3
)
]
array [
]
signal time=1515276668.529836 sender=:1.6 -> destination=:1.2 serial=29048 path=/org/gnome/Mutter/IdleMonitor/Core; interface=org.gnome.Mutter.IdleMonitor; member=WatchFired
uint32 440
signal time=1515276668.530236 sender=:1.2 -> destination=(null destination) serial=3293 path=/org/gnome/SessionManager/Presence; interface=org.gnome.SessionManager.Presence; member=StatusChanged
uint32 3
signal time=1515276668.530565 sender=:1.2 -> destination=(null destination) serial=3295 path=/org/gnome/SessionManager/Presence; interface=org.freedesktop.DBus.Properties; member=PropertiesChanged
string "org.gnome.SessionManager.Presence"
array [
dict entry(
string "status"
variant uint32 3
)
]
array [
]
signal time=1515279067.394398 sender=:1.6 -> destination=:1.2 serial=29051 path=/org/gnome/Mutter/IdleMonitor/Core; interface=org.gnome.Mutter.IdleMonitor; member=WatchFired
uint32 498
signal time=1515279067.394982 sender=:1.2 -> destination=(null destination) serial=3296 path=/org/gnome/SessionManager/Presence; interface=org.gnome.SessionManager.Presence; member=StatusChanged
uint32 0
signal time=1515279067.395139 sender=:1.2 -> destination=(null destination) serial=3297 path=/org/gnome/SessionManager/Presence; interface=org.freedesktop.DBus.Properties; member=PropertiesChanged
string "org.gnome.SessionManager.Presence"
array [
dict entry(
string "status"
variant uint32 0
)
]
array [
]
signal time=1515279067.395662 sender=:1.6 -> destination=:1.42 serial=29052 path=/org/gnome/Mutter/IdleMonitor/Core; interface=org.gnome.Mutter.IdleMonitor; member=WatchFired
uint32 496
signal time=1515279067.414904 sender=:1.6 -> destination=(null destination) serial=29054 path=/org/gnome/Mutter/DisplayConfig; interface=org.freedesktop.DBus.Properties; member=PropertiesChanged
string "org.gnome.Mutter.DisplayConfig"
array [
dict entry(
string "PowerSaveMode"
variant int32 0
)
]
array [
]
signal time=1515279076.828255 sender=:1.6 -> destination=(null destination) serial=29063 path=/org/gnome/Shell; interface=org.gnome.Shell.Extensions; member=ExtensionStatusChanged
string "[email protected]"
int32 1
string ""
signal time=1515279076.829775 sender=org.freedesktop.DBus -> destination=(null destination) serial=851 path=/org/freedesktop/DBus; interface=org.freedesktop.DBus; member=NameOwnerChanged
string "org.kde.StatusNotifierWatcher"
string ""
string ":1.6"
signal time=1515279076.829812 sender=org.freedesktop.DBus -> destination=:1.6 serial=5215 path=/org/freedesktop/DBus; interface=org.freedesktop.DBus; member=NameAcquired
string "org.kde.StatusNotifierWatcher"
signal time=1515279076.829824 sender=:1.6 -> destination=(null destination) serial=29066 path=/org/gnome/Shell; interface=org.gnome.Shell.Extensions; member=ExtensionStatusChanged
string "[email protected]"
int32 1
string ""
signal time=1515279076.841923 sender=:1.6 -> destination=(null destination) serial=29067 path=/org/gnome/Shell; interface=org.gnome.Shell.Extensions; member=ExtensionStatusChanged
string "[email protected]"
int32 1
string ""
signal time=1515279076.844396 sender=:1.6 -> destination=(null destination) serial=29068 path=/org/gnome/Shell; interface=org.gnome.Shell.Extensions; member=ExtensionStatusChanged
string "[email protected]"
int32 1
string ""
signal time=1515279076.851323 sender=:1.6 -> destination=(null destination) serial=29069 path=/org/gnome/ScreenSaver; interface=org.gnome.ScreenSaver; member=ActiveChanged
boolean false
signal time=1515279076.896958 sender=:1.6 -> destination=(null destination) serial=29218 path=/StatusNotifierWatcher; interface=org.kde.StatusNotifierWatcher; member=StatusNotifierItemRegistered
string "/"
signal time=1515279076.921110 sender=:1.38 -> destination=(null destination) serial=2735 path=/org/gnome/evolution/dataserver/CalendarView/1887/93; interface=org.gnome.evolution.dataserver.CalendarView; member=complete
array [
string ""
string ""
]
signal time=1515279076.924727 sender=:1.34 -> destination=(null destination) serial=2701 path=/org/gnome/evolution/dataserver/CalendarView/1870/92; interface=org.gnome.evolution.dataserver.CalendarView; member=complete
array [
string ""
string ""
]
signal time=1515279077.686970 sender=:1.6 -> destination=(null destination) serial=30014 path=/StatusNotifierWatcher; interface=org.freedesktop.DBus.Properties; member=PropertiesChanged
string "org.kde.StatusNotifierWatcher"
array [
dict entry(
string "RegisteredStatusNotifierItems"
variant array [
string ":1.66/org/ayatana/NotificationItem/software_update_available"
]
)
]
array [

    我第一次尝试 for org.gnome.Mutter.IdleMonitor，但uint32值不断增加，不知道为什么？

    我选择了 StatusChanged，这是最终的脚本：

    #!/bin/bash
# Turn keyboard backlight on/off using https://github.com/MatMoul/g810-led

g413-led -a FFFFFF # always turn on on startup (it turns off for some reason on reboot)

dbus-monitor --session "type=signal,interface=org.gnome.SessionManager.Presence,member=StatusChanged" |
  while read x; do
      case "$x" in
        *"uint32 3"*) g413-led -a 000000;;
        *"uint32 0"*) g413-led -a FFFFFF;;
      esac
  done

    屏幕保护程序事件也可以工作：

    g413-led -a FFFFFF # always turn on on startup (it turns off for some reason on reboot)

dbus-monitor --session "type='signal',interface='org.gnome.ScreenSaver'" |
  while read x; do
      case "$x" in
        *"boolean true"*) g413-led -a 000000;;
        *"boolean false"*) g413-led -a FFFFFF;;
      esac
  done

    当然，你可以输入任何你想要的命令。与此相比，第一个脚本的优点是它在用户登录之前点亮键盘，这使得输入密码更容易。

    唯一的缺点是键盘在用户登录后亮起，而不是在按键时亮起，但我可以忍受。

    我正在尝试：

    dbus-monitor --session "type='signal',interface='org.freedesktop.DBus.Properties',path='/org/gnome/Mutter/DisplayConfig'" | grep 'variant int32' |
  while read x; do
      case "$x" in
        *"variant int32 3"*) g413-led -a 000000;;
        *"variant int32 0"*) g413-led -a FFFFFF;;
      esac
  done

    但由于某种原因它不起作用，可能是grep问题。

    • 4

  2. 微小的后台进程

    对于一个简单的问题，您的设置似乎相当复杂。我要做的只是简单地运行一个小后台进程，每 2 秒左右检查一次空闲时间，如果空闲时间超过限制，则采取一项行动，如果切换到低于设定的空闲时间，则采取另一项行动。

    剧本：

    #!/usr/bin/env python3
import time
import subprocess

# set idle time (seconds)
t = 60

# set commands
on_idle = ["g413", "-led", "-a", "000000"]
on_active = ["g413", "-led", "-a", "FFFFFF"]

def set_state(cmd):
    subprocess.Popen(cmd)

def get_idle():
    return int(subprocess.check_output("xprintidle").decode("utf-8").strip())/1000

idle1 = 0

while True:
    time.sleep(2)
    idle2 = get_idle()
    # if idle time exceeds (passes) the limit, run one command
    if all([idle2 >= t, idle1 < t]):
        set_state(on_idle)
    # if idle time switches to below (passes) the limit, run another command
    elif all([idle2 <= t, idle1 > t]):
        set_state(on_active)
    idle1 = idle2

    使用

    • 确保xprintidle已安装

      sudo apt install xprintidle

    • 将脚本复制到一个空文件中，另存为switch_light.py

    • 设置所需的空闲时间以在以下时间采取行动：

      # set idle time (seconds)
t = 60

    • 通过以下命令运行它：

      python3 /path/to/switch_light.py

    • 如果一切正常，请将其添加到启动应用程序。

    笔记）

    • 由于我没有您的键盘，因此无法对其进行测试，但是使用其他命令进行了测试，它可以很好地完成工作。

    • 您可以将脚本与任何其他命令一起使用：

      # set commands
on_idle = ["g413", "-led", "-a", "000000"]
on_active = ["g413", "-led", "-a", "FFFFFF"]

      只要确保像示例中那样分开参数即可。

    • 如果您只想对超过空闲时间（或相反）采取行动，只需注释掉：

      # if idle time switches to below (passes) the limit, run another 
elif all([idle2 <= t, idle1 > t]):
    set_state(on_active)
    • 2

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