那些遇到过的问题

空闲/活动时运行命令

ump*_*sky 4 gnome bash keyboard events power-management

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. 按下按键

我实际上想要实现的是键盘的省电功能。

我想使用：

g413-led -a 000000
g413-led -a FFFFFF
Run Code Online (Sandbox Code Playgroud)

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：

  • 西德尔
  • xprint空闲
  • 自动锁定

请指教是否有更好、更优化的方法？

但是，如果按下按键或从空闲状态恢复时再次将其点亮呢？我想在每个按键上运行命令是多余的。有省电选项的活动吗？显示器节电功能如何发挥作用？

在此输入图像描述

我可以重复使用相同的事件/超时吗？

ump*_*sky 5

我想出的解决方案是 DBUS 事件。

我首先运行dbus-monitor查看监视器从睡眠状态进入/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 "auto-move-windows@gnome-shell-extensions.gcampax.github.com"
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 "clipboard-indicator@tudmotu.com"
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 "ubuntu-appindicators@ubuntu.com"
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 "ubuntu-dock@ubuntu.com"
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 "ubuntu-dock@ubuntu.com"
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 "ubuntu-appindicators@ubuntu.com"
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 "clipboard-indicator@tudmotu.com"
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 "auto-move-windows@gnome-shell-extensions.gcampax.github.com"
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 [
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我首先尝试选择org.gnome.Mutter.IdleMonitor，但uint32值不断增加，不知道为什么？

我用 StatusChanged 解决了，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
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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
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当然，您可以输入任何您想要的命令。与此脚本相比，第一个脚本的优点是它在用户登录之前点亮键盘，这使得输入密码变得更容易。

唯一的缺点是键盘在用户登录后亮起，而不是按键时亮起，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
Run Code Online (Sandbox Code Playgroud)

但由于某种原因它不起作用，可能是 grep 问题。

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